src/inspircd.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  Inspire is copyright (C) 2002-2005 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 /* Now with added unF! ;) */
  18
  19 using namespace std;
  20
  21 #include "inspircd_config.h"
  22 #include "inspircd.h"
  23 #include "inspircd_io.h"
  24 #include "inspircd_util.h"
  25 #include <unistd.h>
  26 #include <fcntl.h>
  27 #include <sys/errno.h>
  28 #include <sys/ioctl.h>
  29 #include <sys/utsname.h>
  30 #include <time.h>
  31 #include <string>
  32 #ifdef GCC3
  33 #include <ext/hash_map>
  34 #else
  35 #include <hash_map>
  36 #endif
  37 #include <map>
  38 #include <sstream>
  39 #include <vector>
  40 #include <deque>
  41 #include <sched.h>
  42 #ifdef THREADED_DNS
  43 #include <pthread.h>
  44 #endif
  45 #include "users.h"
  46 #include "ctables.h"
  47 #include "globals.h"
  48 #include "modules.h"
  49 #include "dynamic.h"
  50 #include "wildcard.h"
  51 #include "message.h"
  52 #include "mode.h"
  53 #include "commands.h"
  54 #include "xline.h"
  55 #include "inspstring.h"
  56 #include "dnsqueue.h"
  57 #include "helperfuncs.h"
  58 #include "hashcomp.h"
  59 #include "socketengine.h"
  60 #include "userprocess.h"
  61 #include "socket.h"
  62 #include "dns.h"
  63 #include "typedefs.h"
  64
  65 InspIRCd* ServerInstance;
  66
  67 int WHOWAS_STALE = 48; // default WHOWAS Entries last 2 days before they go 'stale'
  68 int WHOWAS_MAX = 100;  // default 100 people maximum in the WHOWAS list
  69
  70 extern std::vector<Module*> modules;
  71 extern std::vector<ircd_module*> factory;
  72 std::vector<InspSocket*> module_sockets;
  73
  74 extern int MODCOUNT;
  75 int openSockfd[MAXSOCKS];
  76 sockaddr_in client,server;
  77 socklen_t length;
  78
  79 extern InspSocket* socket_ref[65535];
  80
  81 time_t TIME = time(NULL), OLDTIME = time(NULL);
  82
  83 SocketEngine* SE = NULL;
  84
  85 // This table references users by file descriptor.
  86 // its an array to make it VERY fast, as all lookups are referenced
  87 // by an integer, meaning there is no need for a scan/search operation.
  88 userrec* fd_ref_table[65536];
  89
  90 serverstats* stats = new serverstats;
  91 Server* MyServer = new Server;
  92 ServerConfig *Config = new ServerConfig;
  93
  94 user_hash clientlist;
  95 chan_hash chanlist;
  96 whowas_hash whowas;
  97 command_table cmdlist;
  98 servernamelist servernames;
  99 int BoundPortCount = 0;
 100 std::vector<userrec*> all_opers;
 101 char lowermap[255];
 102
 103
 104 void AddOper(userrec* user)
 105 {
 106         log(DEBUG,"Oper added to optimization list");
 107         all_opers.push_back(user);
 108 }
 109
 110 void AddServerName(std::string servername)
 111 {
 112         log(DEBUG,"Adding server name: %s",servername.c_str());
 113         for (servernamelist::iterator a = servernames.begin(); a < servernames.end(); a++)
 114         {
 115                 if (*a == servername)
 116                         return;
 117         }
 118         servernames.push_back(servername);
 119 }
 120
 121 const char* FindServerNamePtr(std::string servername)
 122 {
 123         for (servernamelist::iterator a = servernames.begin(); a < servernames.end(); a++)
 124         {
 125                 if (*a == servername)
 126                         return a->c_str();
 127         }
 128         AddServerName(servername);
 129         return FindServerNamePtr(servername);
 130 }
 131
 132 void DeleteOper(userrec* user)
 133 {
 134         for (std::vector<userrec*>::iterator a = all_opers.begin(); a < all_opers.end(); a++)
 135         {
 136                 if (*a == user)
 137                 {
 138                         log(DEBUG,"Oper removed from optimization list");
 139                         all_opers.erase(a);
 140                         return;
 141                 }
 142         }
 143 }
 144
 145 std::string InspIRCd::GetRevision()
 146 {
 147         /* w00t got me to replace a bunch of strtok_r
 148          * with something nicer, so i did this. Its the
 149          * same thing really, only in C++. It places the
 150          * text into a std::stringstream which is a readable
 151          * and writeable buffer stream, and then pops two
 152          * words off it, space delimited. Because it reads
 153          * into the same variable twice, the first word
 154          * is discarded, and the second one returned.
 155          */
 156         std::stringstream Revision("$Revision$");
 157         std::string single;
 158         Revision >> single >> single;
 159         return single;
 160 }
 161
 162
 163 /* This function pokes and hacks at a parameter list like the following:
 164  *
 165  * PART #winbot,#darkgalaxy :m00!
 166  *
 167  * to turn it into a series of individual calls like this:
 168  *
 169  * PART #winbot :m00!
 170  * PART #darkgalaxy :m00!
 171  *
 172  * The seperate calls are sent to a callback function provided by the caller
 173  * (the caller will usually call itself recursively). The callback function
 174  * must be a command handler. Calling this function on a line with no list causes
 175  * no action to be taken. You must provide a starting and ending parameter number
 176  * where the range of the list can be found, useful if you have a terminating
 177  * parameter as above which is actually not part of the list, or parameters
 178  * before the actual list as well. This code is used by many functions which
 179  * can function as "one to list" (see the RFC) */
 180
 181 int loop_call(handlerfunc fn, char **parameters, int pcnt, userrec *u, int start, int end, int joins)
 182 {
 183         char plist[MAXBUF];
 184         char *param;
 185         char *pars[32];
 186         char blog[32][MAXBUF];
 187         char blog2[32][MAXBUF];
 188         int j = 0, q = 0, total = 0, t = 0, t2 = 0, total2 = 0;
 189         char keystr[MAXBUF];
 190         char moo[MAXBUF];
 191
 192         for (int i = 0; i <32; i++)
 193                 strcpy(blog[i],"");
 194
 195         for (int i = 0; i <32; i++)
 196                 strcpy(blog2[i],"");
 197
 198         strcpy(moo,"");
 199         for (int i = 0; i <10; i++)
 200         {
 201                 if (!parameters[i])
 202                 {
 203                         parameters[i] = moo;
 204                 }
 205         }
 206         if (joins)
 207         {
 208                 if (pcnt > 1) /* we have a key to copy */
 209                 {
 210                         strlcpy(keystr,parameters[1],MAXBUF);
 211                 }
 212         }
 213
 214         if (!parameters[start])
 215         {
 216                 return 0;
 217         }
 218         if (!strchr(parameters[start],','))
 219         {
 220                 return 0;
 221         }
 222         strcpy(plist,"");
 223         for (int i = start; i <= end; i++)
 224         {
 225                 if (parameters[i])
 226                 {
 227                         strlcat(plist,parameters[i],MAXBUF);
 228                 }
 229         }
 230
 231         j = 0;
 232         param = plist;
 233
 234         t = strlen(plist);
 235         for (int i = 0; i < t; i++)
 236         {
 237                 if (plist[i] == ',')
 238                 {
 239                         plist[i] = '\0';
 240                         strlcpy(blog[j++],param,MAXBUF);
 241                         param = plist+i+1;
 242                         if (j>20)
 243                         {
 244                                 WriteServ(u->fd,"407 %s %s :Too many targets in list, message not delivered.",u->nick,blog[j-1]);
 245                                 return 1;
 246                         }
 247                 }
 248         }
 249         strlcpy(blog[j++],param,MAXBUF);
 250         total = j;
 251
 252         if ((joins) && (keystr) && (total>0)) // more than one channel and is joining
 253         {
 254                 strcat(keystr,",");
 255         }
 256
 257         if ((joins) && (keystr))
 258         {
 259                 if (strchr(keystr,','))
 260                 {
 261                         j = 0;
 262                         param = keystr;
 263                         t2 = strlen(keystr);
 264                         for (int i = 0; i < t2; i++)
 265                         {
 266                                 if (keystr[i] == ',')
 267                                 {
 268                                         keystr[i] = '\0';
 269                                         strlcpy(blog2[j++],param,MAXBUF);
 270                                         param = keystr+i+1;
 271                                 }
 272                         }
 273                         strlcpy(blog2[j++],param,MAXBUF);
 274                         total2 = j;
 275                 }
 276         }
 277
 278         for (j = 0; j < total; j++)
 279         {
 280                 if (blog[j])
 281                 {
 282                         pars[0] = blog[j];
 283                 }
 284                 for (q = end; q < pcnt-1; q++)
 285                 {
 286                         if (parameters[q+1])
 287                         {
 288                                 pars[q-end+1] = parameters[q+1];
 289                         }
 290                 }
 291                 if ((joins) && (parameters[1]))
 292                 {
 293                         if (pcnt > 1)
 294                         {
 295                                 pars[1] = blog2[j];
 296                         }
 297                         else
 298                         {
 299                                 pars[1] = NULL;
 300                         }
 301                 }
 302                 /* repeatedly call the function with the hacked parameter list */
 303                 if ((joins) && (pcnt > 1))
 304                 {
 305                         if (pars[1])
 306                         {
 307                                 // pars[1] already set up and containing key from blog2[j]
 308                                 fn(pars,2,u);
 309                         }
 310                         else
 311                         {
 312                                 pars[1] = parameters[1];
 313                                 fn(pars,2,u);
 314                         }
 315                 }
 316                 else
 317                 {
 318                         fn(pars,pcnt-(end-start),u);
 319                 }
 320         }
 321
 322         return 1;
 323 }
 324
 325
 326
 327 void kill_link(userrec *user,const char* r)
 328 {
 329         user_hash::iterator iter = clientlist.find(user->nick);
 330
 331         char reason[MAXBUF];
 332
 333         strncpy(reason,r,MAXBUF);
 334
 335         if (strlen(reason)>MAXQUIT)
 336         {
 337                 reason[MAXQUIT-1] = '\0';
 338         }
 339
 340         log(DEBUG,"kill_link: %s '%s'",user->nick,reason);
 341         Write(user->fd,"ERROR :Closing link (%s@%s) [%s]",user->ident,user->host,reason);
 342         log(DEBUG,"closing fd %lu",(unsigned long)user->fd);
 343
 344         if (user->registered == 7) {
 345                 FOREACH_MOD OnUserQuit(user,reason);
 346                 WriteCommonExcept(user,"QUIT :%s",reason);
 347         }
 348
 349         user->FlushWriteBuf();
 350
 351         FOREACH_MOD OnUserDisconnect(user);
 352
 353         if (user->fd > -1)
 354         {
 355                 FOREACH_MOD OnRawSocketClose(user->fd);
 356                 SE->DelFd(user->fd);
 357                 user->CloseSocket();
 358         }
 359
 360         // this must come before the WriteOpers so that it doesnt try to fill their buffer with anything
 361         // if they were an oper with +s.
 362         if (user->registered == 7) {
 363                 purge_empty_chans(user);
 364                 // fix by brain: only show local quits because we only show local connects (it just makes SENSE)
 365                 if (user->fd > -1)
 366                         WriteOpers("*** Client exiting: %s!%s@%s [%s]",user->nick,user->ident,user->host,reason);
 367                 AddWhoWas(user);
 368         }
 369
 370         if (iter != clientlist.end())
 371         {
 372                 log(DEBUG,"deleting user hash value %lu",(unsigned long)user);
 373                 if (user->fd > -1)
 374                         fd_ref_table[user->fd] = NULL;
 375                 clientlist.erase(iter);
 376         }
 377         delete user;
 378 }
 379
 380 void kill_link_silent(userrec *user,const char* r)
 381 {
 382         user_hash::iterator iter = clientlist.find(user->nick);
 383
 384         char reason[MAXBUF];
 385
 386         strncpy(reason,r,MAXBUF);
 387
 388         if (strlen(reason)>MAXQUIT)
 389         {
 390                 reason[MAXQUIT-1] = '\0';
 391         }
 392
 393         log(DEBUG,"kill_link: %s '%s'",user->nick,reason);
 394         Write(user->fd,"ERROR :Closing link (%s@%s) [%s]",user->ident,user->host,reason);
 395         log(DEBUG,"closing fd %lu",(unsigned long)user->fd);
 396
 397         user->FlushWriteBuf();
 398
 399         if (user->registered == 7) {
 400                 FOREACH_MOD OnUserQuit(user,reason);
 401                 WriteCommonExcept(user,"QUIT :%s",reason);
 402         }
 403
 404         FOREACH_MOD OnUserDisconnect(user);
 405
 406         if (user->fd > -1)
 407         {
 408                 FOREACH_MOD OnRawSocketClose(user->fd);
 409                 SE->DelFd(user->fd);
 410                 user->CloseSocket();
 411         }
 412
 413         if (user->registered == 7) {
 414                 purge_empty_chans(user);
 415         }
 416
 417         if (iter != clientlist.end())
 418         {
 419                 log(DEBUG,"deleting user hash value %lu",(unsigned long)user);
 420                 if (user->fd > -1)
 421                         fd_ref_table[user->fd] = NULL;
 422                 clientlist.erase(iter);
 423         }
 424         delete user;
 425 }
 426
 427
 428 InspIRCd::InspIRCd(int argc, char** argv)
 429 {
 430         Start();
 431         module_sockets.clear();
 432         this->startup_time = time(NULL);
 433         srand(time(NULL));
 434         log(DEBUG,"*** InspIRCd starting up!");
 435         if (!FileExists(CONFIG_FILE))
 436         {
 437                 printf("ERROR: Cannot open config file: %s\nExiting...\n",CONFIG_FILE);
 438                 log(DEFAULT,"main: no config");
 439                 printf("ERROR: Your config file is missing, this IRCd will self destruct in 10 seconds!\n");
 440                 Exit(ERROR);
 441         }
 442         if (argc > 1) {
 443                 for (int i = 1; i < argc; i++)
 444                 {
 445                         if (!strcmp(argv[i],"-nofork")) {
 446                                 Config->nofork = true;
 447                         }
 448                         if (!strcmp(argv[i],"-wait")) {
 449                                 sleep(6);
 450                         }
 451                         if (!strcmp(argv[i],"-nolimit")) {
 452                                 Config->unlimitcore = true;
 453                         }
 454                 }
 455         }
 456
 457         strlcpy(Config->MyExecutable,argv[0],MAXBUF);
 458
 459         // initialize the lowercase mapping table
 460         for (unsigned int cn = 0; cn < 256; cn++)
 461                 lowermap[cn] = cn;
 462         // lowercase the uppercase chars
 463         for (unsigned int cn = 65; cn < 91; cn++)
 464                 lowermap[cn] = tolower(cn);
 465         // now replace the specific chars for scandanavian comparison
 466         lowermap[(unsigned)'['] = '{';
 467         lowermap[(unsigned)']'] = '}';
 468         lowermap[(unsigned)'\\'] = '|';
 469
 470
 471         OpenLog(argv, argc);
 472         Config->ClearStack();
 473         Config->Read(true,NULL);
 474         CheckRoot();
 475         SetupCommandTable();
 476         AddServerName(Config->ServerName);
 477         CheckDie();
 478         BoundPortCount = BindPorts();
 479
 480         printf("\n");
 481         if (!Config->nofork)
 482         {
 483                 if (DaemonSeed() == ERROR)
 484                 {
 485                         printf("ERROR: could not go into daemon mode. Shutting down.\n");
 486                         Exit(ERROR);
 487                 }
 488         }
 489
 490         /* Because of limitations in kqueue on freebsd, we must fork BEFORE we
 491          * initialize the socket engine.
 492          */
 493         SE = new SocketEngine();
 494
 495         /* We must load the modules AFTER initializing the socket engine, now */
 496         LoadAllModules();
 497
 498         printf("\nInspIRCd is now running!\n");
 499
 500         return;
 501 }
 502
 503 template<typename T> inline string ConvToStr(const T &in)
 504 {
 505         stringstream tmp;
 506         if (!(tmp << in)) return string();
 507         return tmp.str();
 508 }
 509
 510 /* re-allocates a nick in the user_hash after they change nicknames,
 511  * returns a pointer to the new user as it may have moved */
 512
 513 userrec* ReHashNick(char* Old, char* New)
 514 {
 515         //user_hash::iterator newnick;
 516         user_hash::iterator oldnick = clientlist.find(Old);
 517
 518         log(DEBUG,"ReHashNick: %s %s",Old,New);
 519
 520         if (!strcasecmp(Old,New))
 521         {
 522                 log(DEBUG,"old nick is new nick, skipping");
 523                 return oldnick->second;
 524         }
 525
 526         if (oldnick == clientlist.end()) return NULL; /* doesnt exist */
 527
 528         log(DEBUG,"ReHashNick: Found hashed nick %s",Old);
 529
 530         userrec* olduser = oldnick->second;
 531         clientlist[New] = olduser;
 532         clientlist.erase(oldnick);
 533
 534         log(DEBUG,"ReHashNick: Nick rehashed as %s",New);
 535
 536         return clientlist[New];
 537 }
 538
 539 /* adds or updates an entry in the whowas list */
 540 void AddWhoWas(userrec* u)
 541 {
 542         whowas_hash::iterator iter = whowas.find(u->nick);
 543         WhoWasUser *a = new WhoWasUser();
 544         strlcpy(a->nick,u->nick,NICKMAX);
 545         strlcpy(a->ident,u->ident,IDENTMAX);
 546         strlcpy(a->dhost,u->dhost,160);
 547         strlcpy(a->host,u->host,160);
 548         strlcpy(a->fullname,u->fullname,MAXGECOS);
 549         strlcpy(a->server,u->server,256);
 550         a->signon = u->signon;
 551
 552         /* MAX_WHOWAS:   max number of /WHOWAS items
 553          * WHOWAS_STALE: number of hours before a WHOWAS item is marked as stale and
 554          *               can be replaced by a newer one
 555          */
 556
 557         if (iter == whowas.end())
 558         {
 559                 if (whowas.size() >= (unsigned)WHOWAS_MAX)
 560                 {
 561                         for (whowas_hash::iterator i = whowas.begin(); i != whowas.end(); i++)
 562                         {
 563                                 // 3600 seconds in an hour ;)
 564                                 if ((i->second->signon)<(TIME-(WHOWAS_STALE*3600)))
 565                                 {
 566                                         // delete the old one
 567                                         if (i->second) delete i->second;
 568                                         // replace with new one
 569                                         i->second = a;
 570                                         log(DEBUG,"added WHOWAS entry, purged an old record");
 571                                         return;
 572                                 }
 573                         }
 574                         // no space left and user doesnt exist. Don't leave ram in use!
 575                         log(DEBUG,"Not able to update whowas (list at WHOWAS_MAX entries and trying to add new?), freeing excess ram");
 576                         delete a;
 577                 }
 578                 else
 579                 {
 580                         log(DEBUG,"added fresh WHOWAS entry");
 581                         whowas[a->nick] = a;
 582                 }
 583         }
 584         else
 585         {
 586                 log(DEBUG,"updated WHOWAS entry");
 587                 if (iter->second) delete iter->second;
 588                 iter->second = a;
 589         }
 590 }
 591
 592 #ifdef THREADED_DNS
 593 void* dns_task(void* arg)
 594 {
 595         userrec* u = (userrec*)arg;
 596         log(DEBUG,"DNS thread for user %s",u->nick);
 597         DNS dns1;
 598         DNS dns2;
 599         std::string host;
 600         std::string ip;
 601         if (dns1.ReverseLookup(u->ip))
 602         {
 603                 log(DEBUG,"DNS Step 1");
 604                 while (!dns1.HasResult())
 605                 {
 606                         usleep(100);
 607                 }
 608                 host = dns1.GetResult();
 609                 if (host != "")
 610                 {
 611                         log(DEBUG,"DNS Step 2: '%s'",host.c_str());
 612                         if (dns2.ForwardLookup(host))
 613                         {
 614                                 while (!dns2.HasResult())
 615                                 {
 616                                         usleep(100);
 617                                 }
 618                                 ip = dns2.GetResultIP();
 619                                 log(DEBUG,"DNS Step 3 '%s'(%d) '%s'(%d)",ip.c_str(),ip.length(),u->ip,strlen(u->ip));
 620                                 if (ip == std::string(u->ip))
 621                                 {
 622                                         log(DEBUG,"DNS Step 4");
 623                                         if (host.length() < 160)
 624                                         {
 625                                                 log(DEBUG,"DNS Step 5");
 626                                                 strcpy(u->host,host.c_str());
 627                                                 strcpy(u->dhost,host.c_str());
 628                                         }
 629                                 }
 630                         }
 631                 }
 632         }
 633         u->dns_done = true;
 634         return NULL;
 635 }
 636 #endif
 637
 638 /* add a client connection to the sockets list */
 639 void AddClient(int socket, char* host, int port, bool iscached, char* ip)
 640 {
 641         string tempnick;
 642         char tn2[MAXBUF];
 643         user_hash::iterator iter;
 644
 645         tempnick = ConvToStr(socket) + "-unknown";
 646         sprintf(tn2,"%lu-unknown",(unsigned long)socket);
 647
 648         iter = clientlist.find(tempnick);
 649
 650         // fix by brain.
 651         // as these nicknames are 'RFC impossible', we can be sure nobody is going to be
 652         // using one as a registered connection. As theyre per fd, we can also safely assume
 653         // that we wont have collisions. Therefore, if the nick exists in the list, its only
 654         // used by a dead socket, erase the iterator so that the new client may reclaim it.
 655         // this was probably the cause of 'server ignores me when i hammer it with reconnects'
 656         // issue in earlier alphas/betas
 657         if (iter != clientlist.end())
 658         {
 659                 userrec* goner = iter->second;
 660                 delete goner;
 661                 clientlist.erase(iter);
 662         }
 663
 664         /*
 665          * It is OK to access the value here this way since we know
 666          * it exists, we just created it above.
 667          *
 668          * At NO other time should you access a value in a map or a
 669          * hash_map this way.
 670          */
 671         clientlist[tempnick] = new userrec();
 672
 673         NonBlocking(socket);
 674         log(DEBUG,"AddClient: %lu %s %d %s",(unsigned long)socket,host,port,ip);
 675
 676         clientlist[tempnick]->fd = socket;
 677         strlcpy(clientlist[tempnick]->nick, tn2,NICKMAX);
 678         strlcpy(clientlist[tempnick]->host, host,160);
 679         strlcpy(clientlist[tempnick]->dhost, host,160);
 680         clientlist[tempnick]->server = (char*)FindServerNamePtr(Config->ServerName);
 681         strlcpy(clientlist[tempnick]->ident, "unknown",IDENTMAX);
 682         clientlist[tempnick]->registered = 0;
 683         clientlist[tempnick]->signon = TIME + Config->dns_timeout;
 684         clientlist[tempnick]->lastping = 1;
 685         clientlist[tempnick]->port = port;
 686         strlcpy(clientlist[tempnick]->ip,ip,16);
 687
 688         // set the registration timeout for this user
 689         unsigned long class_regtimeout = 90;
 690         int class_flood = 0;
 691         long class_threshold = 5;
 692         long class_sqmax = 262144;      // 256kb
 693         long class_rqmax = 4096;        // 4k
 694
 695         for (ClassVector::iterator i = Config->Classes.begin(); i != Config->Classes.end(); i++)
 696         {
 697                 if (match(clientlist[tempnick]->host,i->host) && (i->type == CC_ALLOW))
 698                 {
 699                         class_regtimeout = (unsigned long)i->registration_timeout;
 700                         class_flood = i->flood;
 701                         clientlist[tempnick]->pingmax = i->pingtime;
 702                         class_threshold = i->threshold;
 703                         class_sqmax = i->sendqmax;
 704                         class_rqmax = i->recvqmax;
 705                         break;
 706                 }
 707         }
 708
 709         clientlist[tempnick]->nping = TIME+clientlist[tempnick]->pingmax + Config->dns_timeout;
 710         clientlist[tempnick]->timeout = TIME+class_regtimeout;
 711         clientlist[tempnick]->flood = class_flood;
 712         clientlist[tempnick]->threshold = class_threshold;
 713         clientlist[tempnick]->sendqmax = class_sqmax;
 714         clientlist[tempnick]->recvqmax = class_rqmax;
 715
 716         ucrec a;
 717         a.channel = NULL;
 718         a.uc_modes = 0;
 719         for (int i = 0; i < MAXCHANS; i++)
 720                 clientlist[tempnick]->chans.push_back(a);
 721
 722         if (clientlist.size() > Config->SoftLimit)
 723         {
 724                 kill_link(clientlist[tempnick],"No more connections allowed");
 725                 return;
 726         }
 727
 728         if (clientlist.size() >= MAXCLIENTS)
 729         {
 730                 kill_link(clientlist[tempnick],"No more connections allowed");
 731                 return;
 732         }
 733
 734         // this is done as a safety check to keep the file descriptors within range of fd_ref_table.
 735         // its a pretty big but for the moment valid assumption:
 736         // file descriptors are handed out starting at 0, and are recycled as theyre freed.
 737         // therefore if there is ever an fd over 65535, 65536 clients must be connected to the
 738         // irc server at once (or the irc server otherwise initiating this many connections, files etc)
 739         // which for the time being is a physical impossibility (even the largest networks dont have more
 740         // than about 10,000 users on ONE server!)
 741         if ((unsigned)socket > 65534)
 742         {
 743                 kill_link(clientlist[tempnick],"Server is full");
 744                 return;
 745         }
 746
 747
 748         char* e = matches_exception(ip);
 749         if (!e)
 750         {
 751                 char* r = matches_zline(ip);
 752                 if (r)
 753                 {
 754                         char reason[MAXBUF];
 755                         snprintf(reason,MAXBUF,"Z-Lined: %s",r);
 756                         kill_link(clientlist[tempnick],reason);
 757                         return;
 758                 }
 759         }
 760         fd_ref_table[socket] = clientlist[tempnick];
 761         SE->AddFd(socket,true,X_ESTAB_CLIENT);
 762 }
 763
 764 /* shows the message of the day, and any other on-logon stuff */
 765 void FullConnectUser(userrec* user)
 766 {
 767         stats->statsConnects++;
 768         user->idle_lastmsg = TIME;
 769         log(DEBUG,"ConnectUser: %s",user->nick);
 770
 771         if ((strcmp(Passwd(user),"")) && (!user->haspassed))
 772         {
 773                 kill_link(user,"Invalid password");
 774                 return;
 775         }
 776         if (IsDenied(user))
 777         {
 778                 kill_link(user,"Unauthorised connection");
 779                 return;
 780         }
 781
 782         char match_against[MAXBUF];
 783         snprintf(match_against,MAXBUF,"%s@%s",user->ident,user->host);
 784         char* e = matches_exception(match_against);
 785         if (!e)
 786         {
 787                 char* r = matches_gline(match_against);
 788                 if (r)
 789                 {
 790                         char reason[MAXBUF];
 791                         snprintf(reason,MAXBUF,"G-Lined: %s",r);
 792                         kill_link_silent(user,reason);
 793                         return;
 794                 }
 795                 r = matches_kline(user->host);
 796                 if (r)
 797                 {
 798                         char reason[MAXBUF];
 799                         snprintf(reason,MAXBUF,"K-Lined: %s",r);
 800                         kill_link_silent(user,reason);
 801                         return;
 802                 }
 803         }
 804
 805
 806         WriteServ(user->fd,"NOTICE Auth :Welcome to \002%s\002!",Config->Network);
 807         WriteServ(user->fd,"001 %s :Welcome to the %s IRC Network %s!%s@%s",user->nick,Config->Network,user->nick,user->ident,user->host);
 808         WriteServ(user->fd,"002 %s :Your host is %s, running version %s",user->nick,Config->ServerName,VERSION);
 809         WriteServ(user->fd,"003 %s :This server was created %s %s",user->nick,__TIME__,__DATE__);
 810         WriteServ(user->fd,"004 %s %s %s iowghraAsORVSxNCWqBzvdHtGI lvhopsmntikrRcaqOALQbSeKVfHGCuzN",user->nick,Config->ServerName,VERSION);
 811         // the neatest way to construct the initial 005 numeric, considering the number of configure constants to go in it...
 812         std::stringstream v;
 813         v << "WALLCHOPS MODES=13 CHANTYPES=# PREFIX=(ohv)@%+ MAP SAFELIST MAXCHANNELS=" << MAXCHANS;
 814         v << " MAXBANS=60 NICKLEN=" << NICKMAX;
 815         v << " TOPICLEN=" << MAXTOPIC << " KICKLEN=" << MAXKICK << " MAXTARGETS=20 AWAYLEN=" << MAXAWAY << " CHANMODES=ohvb,k,l,psmnti NETWORK=";
 816         v << Config->Network;
 817         std::string data005 = v.str();
 818         FOREACH_MOD On005Numeric(data005);
 819         // anfl @ #ratbox, efnet reminded me that according to the RFC this cant contain more than 13 tokens per line...
 820         // so i'd better split it :)
 821         std::stringstream out(data005);
 822         std::string token = "";
 823         std::string line5 = "";
 824         int token_counter = 0;
 825         while (!out.eof())
 826         {
 827                 out >> token;
 828                 line5 = line5 + token + " ";
 829                 token_counter++;
 830                 if ((token_counter >= 13) || (out.eof() == true))
 831                 {
 832                         WriteServ(user->fd,"005 %s %s:are supported by this server",user->nick,line5.c_str());
 833                         line5 = "";
 834                         token_counter = 0;
 835                 }
 836         }
 837         ShowMOTD(user);
 838
 839         // fix 3 by brain, move registered = 7 below these so that spurious modes and host changes dont go out
 840         // onto the network and produce 'fake direction'
 841         FOREACH_MOD OnUserConnect(user);
 842         FOREACH_MOD OnGlobalConnect(user);
 843         user->registered = 7;
 844         WriteOpers("*** Client connecting on port %lu: %s!%s@%s [%s]",(unsigned long)user->port,user->nick,user->ident,user->host,user->ip);
 845 }
 846
 847
 848 /* shows the message of the day, and any other on-logon stuff */
 849 void ConnectUser(userrec *user)
 850 {
 851         // dns is already done, things are fast. no need to wait for dns to complete just pass them straight on
 852         if ((user->dns_done) && (user->registered >= 3) && (AllModulesReportReady(user)))
 853         {
 854                 FullConnectUser(user);
 855         }
 856 }
 857
 858 std::string InspIRCd::GetVersionString()
 859 {
 860         char versiondata[MAXBUF];
 861 #ifdef THREADED_DNS
 862         char dnsengine[] = "multithread";
 863 #else
 864         char dnsengine[] = "singlethread";
 865 #endif
 866         snprintf(versiondata,MAXBUF,"%s Rev. %s %s :%s [FLAGS=%lu,%s,%s]",VERSION,GetRevision().c_str(),Config->ServerName,SYSTEM,(unsigned long)OPTIMISATION,SE->GetName().c_str(),dnsengine);
 867         return versiondata;
 868 }
 869
 870 void handle_version(char **parameters, int pcnt, userrec *user)
 871 {
 872         WriteServ(user->fd,"351 %s :%s",user->nick,ServerInstance->GetVersionString().c_str());
 873 }
 874
 875
 876 bool is_valid_cmd(const char* commandname, int pcnt, userrec * user)
 877 {
 878         for (unsigned int i = 0; i < cmdlist.size(); i++)
 879         {
 880                 if (!strcasecmp(cmdlist[i].command,commandname))
 881                 {
 882                         if (cmdlist[i].handler_function)
 883                         {
 884                                 if ((pcnt>=cmdlist[i].min_params) && (strcasecmp(cmdlist[i].source,"<core>")))
 885                                 {
 886                                         if ((strchr(user->modes,cmdlist[i].flags_needed)) || (!cmdlist[i].flags_needed))
 887                                         {
 888                                                 if (cmdlist[i].flags_needed)
 889                                                 {
 890                                                         if ((user->HasPermission((char*)commandname)) || (is_uline(user->server)))
 891                                                         {
 892                                                                 return true;
 893                                                         }
 894                                                         else
 895                                                         {
 896                                                                 return false;
 897                                                         }
 898                                                 }
 899                                                 return true;
 900                                         }
 901                                 }
 902                         }
 903                 }
 904         }
 905         return false;
 906 }
 907
 908 // calls a handler function for a command
 909
 910 void call_handler(const char* commandname,char **parameters, int pcnt, userrec *user)
 911 {
 912         for (unsigned int i = 0; i < cmdlist.size(); i++)
 913         {
 914                 if (!strcasecmp(cmdlist[i].command,commandname))
 915                 {
 916                         if (cmdlist[i].handler_function)
 917                         {
 918                                 if (pcnt>=cmdlist[i].min_params)
 919                                 {
 920                                         if ((strchr(user->modes,cmdlist[i].flags_needed)) || (!cmdlist[i].flags_needed))
 921                                         {
 922                                                 if (cmdlist[i].flags_needed)
 923                                                 {
 924                                                         if ((user->HasPermission((char*)commandname)) || (is_uline(user->server)))
 925                                                         {
 926                                                                 cmdlist[i].handler_function(parameters,pcnt,user);
 927                                                         }
 928                                                 }
 929                                                 else
 930                                                 {
 931                                                         cmdlist[i].handler_function(parameters,pcnt,user);
 932                                                 }
 933                                         }
 934                                 }
 935                         }
 936                 }
 937         }
 938 }
 939
 940
 941 void force_nickchange(userrec* user,const char* newnick)
 942 {
 943         char nick[MAXBUF];
 944         int MOD_RESULT = 0;
 945
 946         strcpy(nick,"");
 947
 948         FOREACH_RESULT(OnUserPreNick(user,newnick));
 949         if (MOD_RESULT) {
 950                 stats->statsCollisions++;
 951                 kill_link(user,"Nickname collision");
 952                 return;
 953         }
 954         if (matches_qline(newnick))
 955         {
 956                 stats->statsCollisions++;
 957                 kill_link(user,"Nickname collision");
 958                 return;
 959         }
 960
 961         if (user)
 962         {
 963                 if (newnick)
 964                 {
 965                         strncpy(nick,newnick,MAXBUF);
 966                 }
 967                 if (user->registered == 7)
 968                 {
 969                         char* pars[1];
 970                         pars[0] = nick;
 971                         handle_nick(pars,1,user);
 972                 }
 973         }
 974 }
 975
 976
 977 int process_parameters(char **command_p,char *parameters)
 978 {
 979         int j = 0;
 980         int q = strlen(parameters);
 981         if (!q)
 982         {
 983                 /* no parameters, command_p invalid! */
 984                 return 0;
 985         }
 986         if (parameters[0] == ':')
 987         {
 988                 command_p[0] = parameters+1;
 989                 return 1;
 990         }
 991         if (q)
 992         {
 993                 if ((strchr(parameters,' ')==NULL) || (parameters[0] == ':'))
 994                 {
 995                         /* only one parameter */
 996                         command_p[0] = parameters;
 997                         if (parameters[0] == ':')
 998                         {
 999                                 if (strchr(parameters,' ') != NULL)
1000                                 {
1001                                         command_p[0]++;
1002                                 }
1003                         }
1004                         return 1;
1005                 }
1006         }
1007         command_p[j++] = parameters;
1008         for (int i = 0; i <= q; i++)
1009         {
1010                 if (parameters[i] == ' ')
1011                 {
1012                         command_p[j++] = parameters+i+1;
1013                         parameters[i] = '\0';
1014                         if (command_p[j-1][0] == ':')
1015                         {
1016                                 *command_p[j-1]++; /* remove dodgy ":" */
1017                                 break;
1018                                 /* parameter like this marks end of the sequence */
1019                         }
1020                 }
1021         }
1022         return j; /* returns total number of items in the list */
1023 }
1024
1025 void process_command(userrec *user, char* cmd)
1026 {
1027         char *parameters;
1028         char *command;
1029         char *command_p[127];
1030         char p[MAXBUF], temp[MAXBUF];
1031         int j, items, cmd_found;
1032
1033         for (int i = 0; i < 127; i++)
1034                 command_p[i] = NULL;
1035
1036         if (!user)
1037         {
1038                 return;
1039         }
1040         if (!cmd)
1041         {
1042                 return;
1043         }
1044         if (!cmd[0])
1045         {
1046                 return;
1047         }
1048
1049         int total_params = 0;
1050         if (strlen(cmd)>2)
1051         {
1052                 for (unsigned int q = 0; q < strlen(cmd)-1; q++)
1053                 {
1054                         if ((cmd[q] == ' ') && (cmd[q+1] == ':'))
1055                         {
1056                                 total_params++;
1057                                 // found a 'trailing', we dont count them after this.
1058                                 break;
1059                         }
1060                         if (cmd[q] == ' ')
1061                                 total_params++;
1062                 }
1063         }
1064
1065         // another phidjit bug...
1066         if (total_params > 126)
1067         {
1068                 *(strchr(cmd,' ')) = '\0';
1069                 WriteServ(user->fd,"421 %s %s :Too many parameters given",user->nick,cmd);
1070                 return;
1071         }
1072
1073         strlcpy(temp,cmd,MAXBUF);
1074
1075         std::string tmp = cmd;
1076         for (int i = 0; i <= MODCOUNT; i++)
1077         {
1078                 std::string oldtmp = tmp;
1079                 modules[i]->OnServerRaw(tmp,true,user);
1080                 if (oldtmp != tmp)
1081                 {
1082                         log(DEBUG,"A Module changed the input string!");
1083                         log(DEBUG,"New string: %s",tmp.c_str());
1084                         log(DEBUG,"Old string: %s",oldtmp.c_str());
1085                         break;
1086                 }
1087         }
1088         strlcpy(cmd,tmp.c_str(),MAXBUF);
1089         strlcpy(temp,cmd,MAXBUF);
1090
1091         if (!strchr(cmd,' '))
1092         {
1093                 /* no parameters, lets skip the formalities and not chop up
1094                  * the string */
1095                 log(DEBUG,"About to preprocess command with no params");
1096                 items = 0;
1097                 command_p[0] = NULL;
1098                 parameters = NULL;
1099                 for (unsigned int i = 0; i <= strlen(cmd); i++)
1100                 {
1101                         cmd[i] = toupper(cmd[i]);
1102                 }
1103                 command = cmd;
1104         }
1105         else
1106         {
1107                 strcpy(cmd,"");
1108                 j = 0;
1109                 /* strip out extraneous linefeeds through mirc's crappy pasting (thanks Craig) */
1110                 for (unsigned int i = 0; i < strlen(temp); i++)
1111                 {
1112                         if ((temp[i] != 10) && (temp[i] != 13) && (temp[i] != 0) && (temp[i] != 7))
1113                         {
1114                                 cmd[j++] = temp[i];
1115                                 cmd[j] = 0;
1116                         }
1117                 }
1118                 /* split the full string into a command plus parameters */
1119                 parameters = p;
1120                 strcpy(p," ");
1121                 command = cmd;
1122                 if (strchr(cmd,' '))
1123                 {
1124                         for (unsigned int i = 0; i <= strlen(cmd); i++)
1125                         {
1126                                 /* capitalise the command ONLY, leave params intact */
1127                                 cmd[i] = toupper(cmd[i]);
1128                                 /* are we nearly there yet?! :P */
1129                                 if (cmd[i] == ' ')
1130                                 {
1131                                         command = cmd;
1132                                         parameters = cmd+i+1;
1133                                         cmd[i] = '\0';
1134                                         break;
1135                                 }
1136                         }
1137                 }
1138                 else
1139                 {
1140                         for (unsigned int i = 0; i <= strlen(cmd); i++)
1141                         {
1142                                 cmd[i] = toupper(cmd[i]);
1143                         }
1144                 }
1145
1146         }
1147         cmd_found = 0;
1148
1149         if (strlen(command)>MAXCOMMAND)
1150         {
1151                 WriteServ(user->fd,"421 %s %s :Command too long",user->nick,command);
1152                 return;
1153         }
1154
1155         for (unsigned int x = 0; x < strlen(command); x++)
1156         {
1157                 if (((command[x] < 'A') || (command[x] > 'Z')) && (command[x] != '.'))
1158                 {
1159                         if (((command[x] < '0') || (command[x]> '9')) && (command[x] != '-'))
1160                         {
1161                                 if (strchr("@!\"$%^&*(){}[]_=+;:'#~,<>/?\\|`",command[x]))
1162                                 {
1163                                         stats->statsUnknown++;
1164                                         WriteServ(user->fd,"421 %s %s :Unknown command",user->nick,command);
1165                                         return;
1166                                 }
1167                         }
1168                 }
1169         }
1170
1171         for (unsigned int i = 0; i != cmdlist.size(); i++)
1172         {
1173                 if (cmdlist[i].command[0])
1174                 {
1175                         if (strlen(command)>=(strlen(cmdlist[i].command))) if (!strncmp(command, cmdlist[i].command,MAXCOMMAND))
1176                         {
1177                                 if (parameters)
1178                                 {
1179                                         if (parameters[0])
1180                                         {
1181                                                 items = process_parameters(command_p,parameters);
1182                                         }
1183                                         else
1184                                         {
1185                                                 items = 0;
1186                                                 command_p[0] = NULL;
1187                                         }
1188                                 }
1189                                 else
1190                                 {
1191                                         items = 0;
1192                                         command_p[0] = NULL;
1193                                 }
1194
1195                                 if (user)
1196                                 {
1197                                         /* activity resets the ping pending timer */
1198                                         user->nping = TIME + user->pingmax;
1199                                         if ((items) < cmdlist[i].min_params)
1200                                         {
1201                                                 log(DEBUG,"process_command: not enough parameters: %s %s",user->nick,command);
1202                                                 WriteServ(user->fd,"461 %s %s :Not enough parameters",user->nick,command);
1203                                                 return;
1204                                         }
1205                                         if ((!strchr(user->modes,cmdlist[i].flags_needed)) && (cmdlist[i].flags_needed))
1206                                         {
1207                                                 log(DEBUG,"process_command: permission denied: %s %s",user->nick,command);
1208                                                 WriteServ(user->fd,"481 %s :Permission Denied- You do not have the required operator privilages",user->nick);
1209                                                 cmd_found = 1;
1210                                                 return;
1211                                         }
1212                                         if ((cmdlist[i].flags_needed) && (!user->HasPermission(command)))
1213                                         {
1214                                                 log(DEBUG,"process_command: permission denied: %s %s",user->nick,command);
1215                                                 WriteServ(user->fd,"481 %s :Permission Denied- Oper type %s does not have access to command %s",user->nick,user->oper,command);
1216                                                 cmd_found = 1;
1217                                                 return;
1218                                         }
1219                                         /* if the command isnt USER, PASS, or NICK, and nick is empty,
1220                                          * deny command! */
1221                                         if ((strncmp(command,"USER",4)) && (strncmp(command,"NICK",4)) && (strncmp(command,"PASS",4)))
1222                                         {
1223                                                 if ((!isnick(user->nick)) || (user->registered != 7))
1224                                                 {
1225                                                         log(DEBUG,"process_command: not registered: %s %s",user->nick,command);
1226                                                         WriteServ(user->fd,"451 %s :You have not registered",command);
1227                                                         return;
1228                                                 }
1229                                         }
1230                                         if ((user->registered == 7) && (!strchr(user->modes,'o')))
1231                                         {
1232                                                 std::stringstream dcmds(Config->DisabledCommands);
1233                                                 while (!dcmds.eof())
1234                                                 {
1235                                                         std::string thiscmd;
1236                                                         dcmds >> thiscmd;
1237                                                         if (!strcasecmp(thiscmd.c_str(),command))
1238                                                         {
1239                                                                 // command is disabled!
1240                                                                 WriteServ(user->fd,"421 %s %s :This command has been disabled.",user->nick,command);
1241                                                                 return;
1242                                                         }
1243                                                 }
1244                                         }
1245                                         if ((user->registered == 7) || (!strncmp(command,"USER",4)) || (!strncmp(command,"NICK",4)) || (!strncmp(command,"PASS",4)))
1246                                         {
1247                                                 if (cmdlist[i].handler_function)
1248                                                 {
1249
1250                                                         /* ikky /stats counters */
1251                                                         if (temp)
1252                                                         {
1253                                                                 cmdlist[i].use_count++;
1254                                                                 cmdlist[i].total_bytes+=strlen(temp);
1255                                                         }
1256
1257                                                         int MOD_RESULT = 0;
1258                                                         FOREACH_RESULT(OnPreCommand(command,command_p,items,user));
1259                                                         if (MOD_RESULT == 1) {
1260                                                                 return;
1261                                                         }
1262
1263                                                         /* WARNING: nothing may come after the
1264                                                          * command handler call, as the handler
1265                                                          * may free the user structure! */
1266
1267                                                         cmdlist[i].handler_function(command_p,items,user);
1268                                                 }
1269                                                 return;
1270                                         }
1271                                         else
1272                                         {
1273                                                 WriteServ(user->fd,"451 %s :You have not registered",command);
1274                                                 return;
1275                                         }
1276                                 }
1277                                 cmd_found = 1;
1278                         }
1279                 }
1280         }
1281         if ((!cmd_found) && (user))
1282         {
1283                 stats->statsUnknown++;
1284                 WriteServ(user->fd,"421 %s %s :Unknown command",user->nick,command);
1285         }
1286 }
1287
1288 bool removecommands(const char* source)
1289 {
1290         bool go_again = true;
1291         while (go_again)
1292         {
1293                 go_again = false;
1294                 for (std::deque<command_t>::iterator i = cmdlist.begin(); i != cmdlist.end(); i++)
1295                 {
1296                         if (!strcmp(i->source,source))
1297                         {
1298                                 log(DEBUG,"removecommands(%s) Removing dependent command: %s",i->source,i->command);
1299                                 cmdlist.erase(i);
1300                                 go_again = true;
1301                                 break;
1302                         }
1303                 }
1304         }
1305         return true;
1306 }
1307
1308
1309 void process_buffer(const char* cmdbuf,userrec *user)
1310 {
1311         if (!user)
1312         {
1313                 log(DEFAULT,"*** BUG *** process_buffer was given an invalid parameter");
1314                 return;
1315         }
1316         char cmd[MAXBUF];
1317         if (!cmdbuf)
1318         {
1319                 log(DEFAULT,"*** BUG *** process_buffer was given an invalid parameter");
1320                 return;
1321         }
1322         if (!cmdbuf[0])
1323         {
1324                 return;
1325         }
1326         while (*cmdbuf == ' ') cmdbuf++; // strip leading spaces
1327
1328         strlcpy(cmd,cmdbuf,MAXBUF);
1329         if (!cmd[0])
1330         {
1331                 return;
1332         }
1333         int sl = strlen(cmd)-1;
1334         if ((cmd[sl] == 13) || (cmd[sl] == 10))
1335         {
1336                 cmd[sl] = '\0';
1337         }
1338         sl = strlen(cmd)-1;
1339         if ((cmd[sl] == 13) || (cmd[sl] == 10))
1340         {
1341                 cmd[sl] = '\0';
1342         }
1343         sl = strlen(cmd)-1;
1344         while (cmd[sl] == ' ') // strip trailing spaces
1345         {
1346                 cmd[sl] = '\0';
1347                 sl = strlen(cmd)-1;
1348         }
1349
1350         if (!cmd[0])
1351         {
1352                 return;
1353         }
1354         log(DEBUG,"CMDIN: %s %s",user->nick,cmd);
1355         tidystring(cmd);
1356         if ((user) && (cmd))
1357         {
1358                 process_command(user,cmd);
1359         }
1360 }
1361
1362 char* InspIRCd::ModuleError()
1363 {
1364         return MODERR;
1365 }
1366
1367 void InspIRCd::erase_factory(int j)
1368 {
1369         int v = 0;
1370         for (std::vector<ircd_module*>::iterator t = factory.begin(); t != factory.end(); t++)
1371         {
1372                 if (v == j)
1373                 {
1374                         factory.erase(t);
1375                         factory.push_back(NULL);
1376                         return;
1377                 }
1378                 v++;
1379         }
1380 }
1381
1382 void InspIRCd::erase_module(int j)
1383 {
1384         int v1 = 0;
1385         for (std::vector<Module*>::iterator m = modules.begin(); m!= modules.end(); m++)
1386         {
1387                 if (v1 == j)
1388                 {
1389                         delete *m;
1390                         modules.erase(m);
1391                         modules.push_back(NULL);
1392                         break;
1393                 }
1394                 v1++;
1395         }
1396         int v2 = 0;
1397         for (std::vector<std::string>::iterator v = Config->module_names.begin(); v != Config->module_names.end(); v++)
1398         {
1399                 if (v2 == j)
1400                 {
1401                        Config->module_names.erase(v);
1402                        break;
1403                 }
1404                 v2++;
1405         }
1406
1407 }
1408
1409 bool InspIRCd::UnloadModule(const char* filename)
1410 {
1411         std::string filename_str = filename;
1412         for (unsigned int j = 0; j != Config->module_names.size(); j++)
1413         {
1414                 if (Config->module_names[j] == filename_str)
1415                 {
1416                         if (modules[j]->GetVersion().Flags & VF_STATIC)
1417                         {
1418                                 log(DEFAULT,"Failed to unload STATIC module %s",filename);
1419                                 snprintf(MODERR,MAXBUF,"Module not unloadable (marked static)");
1420                                 return false;
1421                         }
1422                         /* Give the module a chance to tidy out all its metadata */
1423                         for (chan_hash::iterator c = chanlist.begin(); c != chanlist.end(); c++)
1424                         {
1425                                 modules[j]->OnCleanup(TYPE_CHANNEL,c->second);
1426                         }
1427                         for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++)
1428                         {
1429                                 modules[j]->OnCleanup(TYPE_USER,u->second);
1430                         }
1431                         FOREACH_MOD OnUnloadModule(modules[j],Config->module_names[j]);
1432                         // found the module
1433                         log(DEBUG,"Deleting module...");
1434                         erase_module(j);
1435                         log(DEBUG,"Erasing module entry...");
1436                         erase_factory(j);
1437                         log(DEBUG,"Removing dependent commands...");
1438                         removecommands(filename);
1439                         log(DEFAULT,"Module %s unloaded",filename);
1440                         MODCOUNT--;
1441                         return true;
1442                 }
1443         }
1444         log(DEFAULT,"Module %s is not loaded, cannot unload it!",filename);
1445         snprintf(MODERR,MAXBUF,"Module not loaded");
1446         return false;
1447 }
1448
1449 bool InspIRCd::LoadModule(const char* filename)
1450 {
1451         char modfile[MAXBUF];
1452 #ifdef STATIC_LINK
1453         snprintf(modfile,MAXBUF,"%s",filename);
1454 #else
1455         snprintf(modfile,MAXBUF,"%s/%s",Config->ModPath,filename);
1456 #endif
1457         std::string filename_str = filename;
1458 #ifndef STATIC_LINK
1459         if (!DirValid(modfile))
1460         {
1461                 log(DEFAULT,"Module %s is not within the modules directory.",modfile);
1462                 snprintf(MODERR,MAXBUF,"Module %s is not within the modules directory.",modfile);
1463                 return false;
1464         }
1465 #endif
1466         log(DEBUG,"Loading module: %s",modfile);
1467 #ifndef STATIC_LINK
1468         if (FileExists(modfile))
1469         {
1470 #endif
1471                 for (unsigned int j = 0; j < Config->module_names.size(); j++)
1472                 {
1473                         if (Config->module_names[j] == filename_str)
1474                         {
1475                                 log(DEFAULT,"Module %s is already loaded, cannot load a module twice!",modfile);
1476                                 snprintf(MODERR,MAXBUF,"Module already loaded");
1477                                 return false;
1478                         }
1479                 }
1480                 ircd_module* a = new ircd_module(modfile);
1481                 factory[MODCOUNT+1] = a;
1482                 if (factory[MODCOUNT+1]->LastError())
1483                 {
1484                         log(DEFAULT,"Unable to load %s: %s",modfile,factory[MODCOUNT+1]->LastError());
1485                         snprintf(MODERR,MAXBUF,"Loader/Linker error: %s",factory[MODCOUNT+1]->LastError());
1486                         MODCOUNT--;
1487                         return false;
1488                 }
1489                 if (factory[MODCOUNT+1]->factory)
1490                 {
1491                         Module* m = factory[MODCOUNT+1]->factory->CreateModule(MyServer);
1492                         modules[MODCOUNT+1] = m;
1493                         /* save the module and the module's classfactory, if
1494                          * this isnt done, random crashes can occur :/ */
1495                         Config->module_names.push_back(filename);
1496                 }
1497                 else
1498                 {
1499                         log(DEFAULT,"Unable to load %s",modfile);
1500                         snprintf(MODERR,MAXBUF,"Factory function failed!");
1501                         return false;
1502                 }
1503 #ifndef STATIC_LINK
1504         }
1505         else
1506         {
1507                 log(DEFAULT,"InspIRCd: startup: Module Not Found %s",modfile);
1508                 snprintf(MODERR,MAXBUF,"Module file could not be found");
1509                 return false;
1510         }
1511 #endif
1512         MODCOUNT++;
1513         FOREACH_MOD OnLoadModule(modules[MODCOUNT],filename_str);
1514         return true;
1515 }
1516
1517 int InspIRCd::Run()
1518 {
1519         bool expire_run = false;
1520         std::vector<int> activefds;
1521         int incomingSockfd;
1522         int in_port;
1523         userrec* cu = NULL;
1524         InspSocket* s = NULL;
1525         InspSocket* s_del = NULL;
1526         char* target;
1527         unsigned int numberactive;
1528         sockaddr_in sock_us;     // our port number
1529         socklen_t uslen;         // length of our port number
1530
1531         if (!Config->nofork)
1532         {
1533                 freopen("/dev/null","w",stdout);
1534                 freopen("/dev/null","w",stderr);
1535         }
1536
1537         /* Add the listening sockets used for client inbound connections
1538          * to the socket engine
1539          */
1540         for (int count = 0; count < BoundPortCount; count++)
1541                 SE->AddFd(openSockfd[count],true,X_LISTEN);
1542
1543         WritePID(Config->PID);
1544
1545         /* main loop, this never returns */
1546         for (;;)
1547         {
1548                 /* time() seems to be a pretty expensive syscall, so avoid calling it too much.
1549                  * Once per loop iteration is pleanty.
1550                  */
1551                 OLDTIME = TIME;
1552                 TIME = time(NULL);
1553
1554                 /* Run background module timers every few seconds
1555                  * (the docs say modules shouldnt rely on accurate
1556                  * timing using this event, so we dont have to
1557                  * time this exactly).
1558                  */
1559                 if (((TIME % 8) == 0) && (!expire_run))
1560                 {
1561                         expire_lines();
1562                         FOREACH_MOD OnBackgroundTimer(TIME);
1563                         expire_run = true;
1564                         continue;
1565                 }
1566                 if ((TIME % 8) == 1)
1567                         expire_run = false;
1568
1569                 /* Once a second, do the background processing */
1570                 if (TIME != OLDTIME)
1571                         while (DoBackgroundUserStuff(TIME));
1572
1573                 /* Call the socket engine to wait on the active
1574                  * file descriptors. The socket engine has everything's
1575                  * descriptors in its list... dns, modules, users,
1576                  * servers... so its nice and easy, just one call.
1577                  */
1578                 SE->Wait(activefds);
1579
1580                 /**
1581                  * Now process each of the fd's. For users, we have a fast
1582                  * lookup table which can find a user by file descriptor, so
1583                  * processing them by fd isnt expensive. If we have a lot of
1584                  * listening ports or module sockets though, things could get
1585                  * ugly.
1586                  */
1587                 numberactive = activefds.size();
1588                 for (unsigned int activefd = 0; activefd < numberactive; activefd++)
1589                 {
1590                         int socket_type = SE->GetType(activefds[activefd]);
1591                         switch (socket_type)
1592                         {
1593                                 case X_ESTAB_CLIENT:
1594
1595                                         cu = fd_ref_table[activefds[activefd]];
1596                                         if (cu)
1597                                                 ProcessUser(cu);
1598
1599                                 break;
1600
1601                                 case X_ESTAB_MODULE:
1602
1603                                         /* Process module-owned sockets.
1604                                          * Modules are encouraged to inherit their sockets from
1605                                          * InspSocket so we can process them neatly like this.
1606                                          */
1607                                         s = socket_ref[activefds[activefd]];
1608
1609                                         if ((s) && (!s->Poll()))
1610                                         {
1611                                                 log(DEBUG,"Socket poll returned false, close and bail");
1612                                                 SE->DelFd(s->GetFd());
1613                                                 for (std::vector<InspSocket*>::iterator a = module_sockets.begin(); a < module_sockets.end(); a++)
1614                                                 {
1615                                                         s_del = (InspSocket*)*a;
1616                                                         if ((s_del) && (s_del->GetFd() == activefds[activefd]))
1617                                                         {
1618                                                                 module_sockets.erase(a);
1619                                                                 break;
1620                                                         }
1621                                                 }
1622                                                 s->Close();
1623                                                 delete s;
1624                                         }
1625
1626                                 break;
1627
1628                                 case X_ESTAB_DNS:
1629
1630                                         /* When we are using single-threaded dns,
1631                                          * the sockets for dns end up in our mainloop.
1632                                          * When we are using multi-threaded dns,
1633                                          * each thread has its own basic poll() loop
1634                                          * within it, making them 'fire and forget'
1635                                          * and independent of the mainloop.
1636                                          */
1637 #ifndef THREADED_DNS
1638                                         dns_poll(activefds[activefd]);
1639 #endif
1640                                 break;
1641
1642                                 case X_LISTEN:
1643
1644                                         /* It's a listener */
1645                                         uslen = sizeof(sock_us);
1646                                         length = sizeof(client);
1647                                         incomingSockfd = accept (activefds[activefd],(struct sockaddr*)&client,&length);
1648                                         if (!getsockname(incomingSockfd,(sockaddr*)&sock_us,&uslen))
1649                                         {
1650                                                 in_port = ntohs(sock_us.sin_port);
1651                                                 log(DEBUG,"Accepted socket %d",incomingSockfd);
1652                                                 target = (char*)inet_ntoa(client.sin_addr);
1653                                                 /* Years and years ago, we used to resolve here
1654                                                  * using gethostbyaddr(). That is sucky and we
1655                                                  * don't do that any more...
1656                                                  */
1657                                                 if (incomingSockfd >= 0)
1658                                                 {
1659                                                         FOREACH_MOD OnRawSocketAccept(incomingSockfd, target, in_port);
1660                                                         stats->statsAccept++;
1661                                                         AddClient(incomingSockfd, target, in_port, false, target);
1662                                                         log(DEBUG,"Adding client on port %lu fd=%lu",(unsigned long)in_port,(unsigned long)incomingSockfd);
1663                                                 }
1664                                                 else
1665                                                 {
1666                                                         WriteOpers("*** WARNING: accept() failed on port %lu (%s)",(unsigned long)in_port,target);
1667                                                         log(DEBUG,"accept failed: %lu",(unsigned long)in_port);
1668                                                         stats->statsRefused++;
1669                                                 }
1670                                         }
1671                                         else
1672                                         {
1673                                                 log(DEBUG,"Couldnt look up the port number for fd %lu (OS BROKEN?!)",incomingSockfd);
1674                                                 shutdown(incomingSockfd,2);
1675                                                 close(incomingSockfd);
1676                                         }
1677                                 break;
1678
1679                                 default:
1680                                         /* Something went wrong if we're in here.
1681                                          * In fact, so wrong, im not quite sure
1682                                          * what we would do, so for now, its going
1683                                          * to safely do bugger all.
1684                                          */
1685                                 break;
1686                         }
1687                 }
1688
1689         }
1690         /* This is never reached -- we hope! */
1691         return 0;
1692 }
1693
1694 /**********************************************************************************/
1695
1696 /**
1697  * An ircd in four lines! bwahahaha. ahahahahaha. ahahah *cough*.
1698  */
1699
1700 int main(int argc, char** argv)
1701 {
1702         ServerInstance = new InspIRCd(argc, argv);
1703         ServerInstance->Run();
1704         delete ServerInstance;
1705         return 0;
1706 }
1707