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
  73 extern int MODCOUNT;
  74 int openSockfd[MAXSOCKS];
  75 sockaddr_in client,server;
  76 socklen_t length;
  77
  78 extern InspSocket* socket_ref[65535];
  79
  80 time_t TIME = time(NULL), OLDTIME = time(NULL);
  81
  82 SocketEngine* SE = NULL;
  83
  84 // This table references users by file descriptor.
  85 // its an array to make it VERY fast, as all lookups are referenced
  86 // by an integer, meaning there is no need for a scan/search operation.
  87 userrec* fd_ref_table[65536];
  88
  89 serverstats* stats = new serverstats;
  90 Server* MyServer = new Server;
  91 ServerConfig *Config = new ServerConfig;
  92
  93 user_hash clientlist;
  94 chan_hash chanlist;
  95 whowas_hash whowas;
  96 command_table cmdlist;
  97 servernamelist servernames;
  98 int BoundPortCount = 0;
  99 std::vector<userrec*> all_opers;
 100 char lowermap[255];
 101
 102
 103 void AddOper(userrec* user)
 104 {
 105         log(DEBUG,"Oper added to optimization list");
 106         all_opers.push_back(user);
 107 }
 108
 109 void AddServerName(std::string servername)
 110 {
 111         log(DEBUG,"Adding server name: %s",servername.c_str());
 112         for (servernamelist::iterator a = servernames.begin(); a < servernames.end(); a++)
 113         {
 114                 if (*a == servername)
 115                         return;
 116         }
 117         servernames.push_back(servername);
 118 }
 119
 120 const char* FindServerNamePtr(std::string servername)
 121 {
 122         for (servernamelist::iterator a = servernames.begin(); a < servernames.end(); a++)
 123         {
 124                 if (*a == servername)
 125                         return a->c_str();
 126         }
 127         AddServerName(servername);
 128         return FindServerNamePtr(servername);
 129 }
 130
 131 void DeleteOper(userrec* user)
 132 {
 133         for (std::vector<userrec*>::iterator a = all_opers.begin(); a < all_opers.end(); a++)
 134         {
 135                 if (*a == user)
 136                 {
 137                         log(DEBUG,"Oper removed from optimization list");
 138                         all_opers.erase(a);
 139                         return;
 140                 }
 141         }
 142 }
 143
 144 std::string GetRevision()
 145 {
 146         /* w00t got me to replace a bunch of strtok_r
 147          * with something nicer, so i did this. Its the
 148          * same thing really, only in C++. It places the
 149          * text into a std::stringstream which is a readable
 150          * and writeable buffer stream, and then pops two
 151          * words off it, space delimited. Because it reads
 152          * into the same variable twice, the first word
 153          * is discarded, and the second one returned.
 154          */
 155         std::stringstream Revision("$Revision$");
 156         std::string single;
 157         Revision >> single >> single;
 158         return single;
 159 }
 160
 161
 162 /* This function pokes and hacks at a parameter list like the following:
 163  *
 164  * PART #winbot,#darkgalaxy :m00!
 165  *
 166  * to turn it into a series of individual calls like this:
 167  *
 168  * PART #winbot :m00!
 169  * PART #darkgalaxy :m00!
 170  *
 171  * The seperate calls are sent to a callback function provided by the caller
 172  * (the caller will usually call itself recursively). The callback function
 173  * must be a command handler. Calling this function on a line with no list causes
 174  * no action to be taken. You must provide a starting and ending parameter number
 175  * where the range of the list can be found, useful if you have a terminating
 176  * parameter as above which is actually not part of the list, or parameters
 177  * before the actual list as well. This code is used by many functions which
 178  * can function as "one to list" (see the RFC) */
 179
 180 int loop_call(handlerfunc fn, char **parameters, int pcnt, userrec *u, int start, int end, int joins)
 181 {
 182         char plist[MAXBUF];
 183         char *param;
 184         char *pars[32];
 185         char blog[32][MAXBUF];
 186         char blog2[32][MAXBUF];
 187         int j = 0, q = 0, total = 0, t = 0, t2 = 0, total2 = 0;
 188         char keystr[MAXBUF];
 189         char moo[MAXBUF];
 190
 191         for (int i = 0; i <32; i++)
 192                 strcpy(blog[i],"");
 193
 194         for (int i = 0; i <32; i++)
 195                 strcpy(blog2[i],"");
 196
 197         strcpy(moo,"");
 198         for (int i = 0; i <10; i++)
 199         {
 200                 if (!parameters[i])
 201                 {
 202                         parameters[i] = moo;
 203                 }
 204         }
 205         if (joins)
 206         {
 207                 if (pcnt > 1) /* we have a key to copy */
 208                 {
 209                         strlcpy(keystr,parameters[1],MAXBUF);
 210                 }
 211         }
 212
 213         if (!parameters[start])
 214         {
 215                 return 0;
 216         }
 217         if (!strchr(parameters[start],','))
 218         {
 219                 return 0;
 220         }
 221         strcpy(plist,"");
 222         for (int i = start; i <= end; i++)
 223         {
 224                 if (parameters[i])
 225                 {
 226                         strlcat(plist,parameters[i],MAXBUF);
 227                 }
 228         }
 229
 230         j = 0;
 231         param = plist;
 232
 233         t = strlen(plist);
 234         for (int i = 0; i < t; i++)
 235         {
 236                 if (plist[i] == ',')
 237                 {
 238                         plist[i] = '\0';
 239                         strlcpy(blog[j++],param,MAXBUF);
 240                         param = plist+i+1;
 241                         if (j>20)
 242                         {
 243                                 WriteServ(u->fd,"407 %s %s :Too many targets in list, message not delivered.",u->nick,blog[j-1]);
 244                                 return 1;
 245                         }
 246                 }
 247         }
 248         strlcpy(blog[j++],param,MAXBUF);
 249         total = j;
 250
 251         if ((joins) && (keystr) && (total>0)) // more than one channel and is joining
 252         {
 253                 strcat(keystr,",");
 254         }
 255
 256         if ((joins) && (keystr))
 257         {
 258                 if (strchr(keystr,','))
 259                 {
 260                         j = 0;
 261                         param = keystr;
 262                         t2 = strlen(keystr);
 263                         for (int i = 0; i < t2; i++)
 264                         {
 265                                 if (keystr[i] == ',')
 266                                 {
 267                                         keystr[i] = '\0';
 268                                         strlcpy(blog2[j++],param,MAXBUF);
 269                                         param = keystr+i+1;
 270                                 }
 271                         }
 272                         strlcpy(blog2[j++],param,MAXBUF);
 273                         total2 = j;
 274                 }
 275         }
 276
 277         for (j = 0; j < total; j++)
 278         {
 279                 if (blog[j])
 280                 {
 281                         pars[0] = blog[j];
 282                 }
 283                 for (q = end; q < pcnt-1; q++)
 284                 {
 285                         if (parameters[q+1])
 286                         {
 287                                 pars[q-end+1] = parameters[q+1];
 288                         }
 289                 }
 290                 if ((joins) && (parameters[1]))
 291                 {
 292                         if (pcnt > 1)
 293                         {
 294                                 pars[1] = blog2[j];
 295                         }
 296                         else
 297                         {
 298                                 pars[1] = NULL;
 299                         }
 300                 }
 301                 /* repeatedly call the function with the hacked parameter list */
 302                 if ((joins) && (pcnt > 1))
 303                 {
 304                         if (pars[1])
 305                         {
 306                                 // pars[1] already set up and containing key from blog2[j]
 307                                 fn(pars,2,u);
 308                         }
 309                         else
 310                         {
 311                                 pars[1] = parameters[1];
 312                                 fn(pars,2,u);
 313                         }
 314                 }
 315                 else
 316                 {
 317                         fn(pars,pcnt-(end-start),u);
 318                 }
 319         }
 320
 321         return 1;
 322 }
 323
 324
 325
 326 void kill_link(userrec *user,const char* r)
 327 {
 328         user_hash::iterator iter = clientlist.find(user->nick);
 329
 330         char reason[MAXBUF];
 331
 332         strncpy(reason,r,MAXBUF);
 333
 334         if (strlen(reason)>MAXQUIT)
 335         {
 336                 reason[MAXQUIT-1] = '\0';
 337         }
 338
 339         log(DEBUG,"kill_link: %s '%s'",user->nick,reason);
 340         Write(user->fd,"ERROR :Closing link (%s@%s) [%s]",user->ident,user->host,reason);
 341         log(DEBUG,"closing fd %lu",(unsigned long)user->fd);
 342
 343         if (user->registered == 7) {
 344                 FOREACH_MOD OnUserQuit(user,reason);
 345                 WriteCommonExcept(user,"QUIT :%s",reason);
 346         }
 347
 348         user->FlushWriteBuf();
 349
 350         FOREACH_MOD OnUserDisconnect(user);
 351
 352         if (user->fd > -1)
 353         {
 354                 FOREACH_MOD OnRawSocketClose(user->fd);
 355                 SE->DelFd(user->fd);
 356                 user->CloseSocket();
 357         }
 358
 359         // this must come before the WriteOpers so that it doesnt try to fill their buffer with anything
 360         // if they were an oper with +s.
 361         if (user->registered == 7) {
 362                 purge_empty_chans(user);
 363                 // fix by brain: only show local quits because we only show local connects (it just makes SENSE)
 364                 if (user->fd > -1)
 365                         WriteOpers("*** Client exiting: %s!%s@%s [%s]",user->nick,user->ident,user->host,reason);
 366                 AddWhoWas(user);
 367         }
 368
 369         if (iter != clientlist.end())
 370         {
 371                 log(DEBUG,"deleting user hash value %lu",(unsigned long)user);
 372                 if (user->fd > -1)
 373                         fd_ref_table[user->fd] = NULL;
 374                 clientlist.erase(iter);
 375         }
 376         delete user;
 377 }
 378
 379 void kill_link_silent(userrec *user,const char* r)
 380 {
 381         user_hash::iterator iter = clientlist.find(user->nick);
 382
 383         char reason[MAXBUF];
 384
 385         strncpy(reason,r,MAXBUF);
 386
 387         if (strlen(reason)>MAXQUIT)
 388         {
 389                 reason[MAXQUIT-1] = '\0';
 390         }
 391
 392         log(DEBUG,"kill_link: %s '%s'",user->nick,reason);
 393         Write(user->fd,"ERROR :Closing link (%s@%s) [%s]",user->ident,user->host,reason);
 394         log(DEBUG,"closing fd %lu",(unsigned long)user->fd);
 395
 396         user->FlushWriteBuf();
 397
 398         if (user->registered == 7) {
 399                 FOREACH_MOD OnUserQuit(user,reason);
 400                 WriteCommonExcept(user,"QUIT :%s",reason);
 401         }
 402
 403         FOREACH_MOD OnUserDisconnect(user);
 404
 405         if (user->fd > -1)
 406         {
 407                 FOREACH_MOD OnRawSocketClose(user->fd);
 408                 SE->DelFd(user->fd);
 409                 user->CloseSocket();
 410         }
 411
 412         if (user->registered == 7) {
 413                 purge_empty_chans(user);
 414         }
 415
 416         if (iter != clientlist.end())
 417         {
 418                 log(DEBUG,"deleting user hash value %lu",(unsigned long)user);
 419                 if (user->fd > -1)
 420                         fd_ref_table[user->fd] = NULL;
 421                 clientlist.erase(iter);
 422         }
 423         delete user;
 424 }
 425
 426
 427 InspIRCd::InspIRCd(int argc, char** argv)
 428 {
 429         Start();
 430         this->startup_time = time(NULL);
 431         srand(time(NULL));
 432         log(DEBUG,"*** InspIRCd starting up!");
 433         if (!FileExists(CONFIG_FILE))
 434         {
 435                 printf("ERROR: Cannot open config file: %s\nExiting...\n",CONFIG_FILE);
 436                 log(DEFAULT,"main: no config");
 437                 printf("ERROR: Your config file is missing, this IRCd will self destruct in 10 seconds!\n");
 438                 Exit(ERROR);
 439         }
 440         if (argc > 1) {
 441                 for (int i = 1; i < argc; i++)
 442                 {
 443                         if (!strcmp(argv[i],"-nofork")) {
 444                                 Config->nofork = true;
 445                         }
 446                         if (!strcmp(argv[i],"-wait")) {
 447                                 sleep(6);
 448                         }
 449                         if (!strcmp(argv[i],"-nolimit")) {
 450                                 Config->unlimitcore = true;
 451                         }
 452                 }
 453         }
 454
 455         strlcpy(Config->MyExecutable,argv[0],MAXBUF);
 456
 457         // initialize the lowercase mapping table
 458         for (unsigned int cn = 0; cn < 256; cn++)
 459                 lowermap[cn] = cn;
 460         // lowercase the uppercase chars
 461         for (unsigned int cn = 65; cn < 91; cn++)
 462                 lowermap[cn] = tolower(cn);
 463         // now replace the specific chars for scandanavian comparison
 464         lowermap[(unsigned)'['] = '{';
 465         lowermap[(unsigned)']'] = '}';
 466         lowermap[(unsigned)'\\'] = '|';
 467
 468
 469         OpenLog(argv, argc);
 470         Config->ClearStack();
 471         Config->Read(true,NULL);
 472         CheckRoot();
 473         SetupCommandTable();
 474         AddServerName(Config->ServerName);
 475         CheckDie();
 476         BoundPortCount = BindPorts();
 477
 478         printf("\n");
 479         if (!Config->nofork)
 480         {
 481                 if (DaemonSeed() == ERROR)
 482                 {
 483                         printf("ERROR: could not go into daemon mode. Shutting down.\n");
 484                         Exit(ERROR);
 485                 }
 486         }
 487
 488         /* Because of limitations in kqueue on freebsd, we must fork BEFORE we
 489          * initialize the socket engine.
 490          */
 491         SE = new SocketEngine();
 492
 493         /* We must load the modules AFTER initializing the socket engine, now */
 494         LoadAllModules();
 495
 496         printf("\nInspIRCd is now running!\n");
 497
 498         return;
 499 }
 500
 501 template<typename T> inline string ConvToStr(const T &in)
 502 {
 503         stringstream tmp;
 504         if (!(tmp << in)) return string();
 505         return tmp.str();
 506 }
 507
 508 /* re-allocates a nick in the user_hash after they change nicknames,
 509  * returns a pointer to the new user as it may have moved */
 510
 511 userrec* ReHashNick(char* Old, char* New)
 512 {
 513         //user_hash::iterator newnick;
 514         user_hash::iterator oldnick = clientlist.find(Old);
 515
 516         log(DEBUG,"ReHashNick: %s %s",Old,New);
 517
 518         if (!strcasecmp(Old,New))
 519         {
 520                 log(DEBUG,"old nick is new nick, skipping");
 521                 return oldnick->second;
 522         }
 523
 524         if (oldnick == clientlist.end()) return NULL; /* doesnt exist */
 525
 526         log(DEBUG,"ReHashNick: Found hashed nick %s",Old);
 527
 528         userrec* olduser = oldnick->second;
 529         clientlist[New] = olduser;
 530         clientlist.erase(oldnick);
 531
 532         log(DEBUG,"ReHashNick: Nick rehashed as %s",New);
 533
 534         return clientlist[New];
 535 }
 536
 537 /* adds or updates an entry in the whowas list */
 538 void AddWhoWas(userrec* u)
 539 {
 540         whowas_hash::iterator iter = whowas.find(u->nick);
 541         WhoWasUser *a = new WhoWasUser();
 542         strlcpy(a->nick,u->nick,NICKMAX);
 543         strlcpy(a->ident,u->ident,IDENTMAX);
 544         strlcpy(a->dhost,u->dhost,160);
 545         strlcpy(a->host,u->host,160);
 546         strlcpy(a->fullname,u->fullname,MAXGECOS);
 547         strlcpy(a->server,u->server,256);
 548         a->signon = u->signon;
 549
 550         /* MAX_WHOWAS:   max number of /WHOWAS items
 551          * WHOWAS_STALE: number of hours before a WHOWAS item is marked as stale and
 552          *               can be replaced by a newer one
 553          */
 554
 555         if (iter == whowas.end())
 556         {
 557                 if (whowas.size() >= (unsigned)WHOWAS_MAX)
 558                 {
 559                         for (whowas_hash::iterator i = whowas.begin(); i != whowas.end(); i++)
 560                         {
 561                                 // 3600 seconds in an hour ;)
 562                                 if ((i->second->signon)<(TIME-(WHOWAS_STALE*3600)))
 563                                 {
 564                                         // delete the old one
 565                                         if (i->second) delete i->second;
 566                                         // replace with new one
 567                                         i->second = a;
 568                                         log(DEBUG,"added WHOWAS entry, purged an old record");
 569                                         return;
 570                                 }
 571                         }
 572                         // no space left and user doesnt exist. Don't leave ram in use!
 573                         log(DEBUG,"Not able to update whowas (list at WHOWAS_MAX entries and trying to add new?), freeing excess ram");
 574                         delete a;
 575                 }
 576                 else
 577                 {
 578                         log(DEBUG,"added fresh WHOWAS entry");
 579                         whowas[a->nick] = a;
 580                 }
 581         }
 582         else
 583         {
 584                 log(DEBUG,"updated WHOWAS entry");
 585                 if (iter->second) delete iter->second;
 586                 iter->second = a;
 587         }
 588 }
 589
 590 #ifdef THREADED_DNS
 591 void* dns_task(void* arg)
 592 {
 593         userrec* u = (userrec*)arg;
 594         log(DEBUG,"DNS thread for user %s",u->nick);
 595         DNS dns1;
 596         DNS dns2;
 597         std::string host;
 598         std::string ip;
 599         if (dns1.ReverseLookup(u->ip))
 600         {
 601                 log(DEBUG,"DNS Step 1");
 602                 while (!dns1.HasResult())
 603                 {
 604                         usleep(100);
 605                 }
 606                 host = dns1.GetResult();
 607                 if (host != "")
 608                 {
 609                         log(DEBUG,"DNS Step 2: '%s'",host.c_str());
 610                         if (dns2.ForwardLookup(host))
 611                         {
 612                                 while (!dns2.HasResult())
 613                                 {
 614                                         usleep(100);
 615                                 }
 616                                 ip = dns2.GetResultIP();
 617                                 log(DEBUG,"DNS Step 3 '%s'(%d) '%s'(%d)",ip.c_str(),ip.length(),u->ip,strlen(u->ip));
 618                                 if (ip == std::string(u->ip))
 619                                 {
 620                                         log(DEBUG,"DNS Step 4");
 621                                         if (host.length() < 160)
 622                                         {
 623                                                 log(DEBUG,"DNS Step 5");
 624                                                 strcpy(u->host,host.c_str());
 625                                                 strcpy(u->dhost,host.c_str());
 626                                         }
 627                                 }
 628                         }
 629                 }
 630         }
 631         u->dns_done = true;
 632         return NULL;
 633 }
 634 #endif
 635
 636 /* add a client connection to the sockets list */
 637 void AddClient(int socket, char* host, int port, bool iscached, char* ip)
 638 {
 639         string tempnick;
 640         char tn2[MAXBUF];
 641         user_hash::iterator iter;
 642
 643         tempnick = ConvToStr(socket) + "-unknown";
 644         sprintf(tn2,"%lu-unknown",(unsigned long)socket);
 645
 646         iter = clientlist.find(tempnick);
 647
 648         // fix by brain.
 649         // as these nicknames are 'RFC impossible', we can be sure nobody is going to be
 650         // using one as a registered connection. As theyre per fd, we can also safely assume
 651         // that we wont have collisions. Therefore, if the nick exists in the list, its only
 652         // used by a dead socket, erase the iterator so that the new client may reclaim it.
 653         // this was probably the cause of 'server ignores me when i hammer it with reconnects'
 654         // issue in earlier alphas/betas
 655         if (iter != clientlist.end())
 656         {
 657                 userrec* goner = iter->second;
 658                 delete goner;
 659                 clientlist.erase(iter);
 660         }
 661
 662         /*
 663          * It is OK to access the value here this way since we know
 664          * it exists, we just created it above.
 665          *
 666          * At NO other time should you access a value in a map or a
 667          * hash_map this way.
 668          */
 669         clientlist[tempnick] = new userrec();
 670
 671         NonBlocking(socket);
 672         log(DEBUG,"AddClient: %lu %s %d %s",(unsigned long)socket,host,port,ip);
 673
 674         clientlist[tempnick]->fd = socket;
 675         strlcpy(clientlist[tempnick]->nick, tn2,NICKMAX);
 676         strlcpy(clientlist[tempnick]->host, host,160);
 677         strlcpy(clientlist[tempnick]->dhost, host,160);
 678         clientlist[tempnick]->server = (char*)FindServerNamePtr(Config->ServerName);
 679         strlcpy(clientlist[tempnick]->ident, "unknown",IDENTMAX);
 680         clientlist[tempnick]->registered = 0;
 681         clientlist[tempnick]->signon = TIME + Config->dns_timeout;
 682         clientlist[tempnick]->lastping = 1;
 683         clientlist[tempnick]->port = port;
 684         strlcpy(clientlist[tempnick]->ip,ip,16);
 685
 686         // set the registration timeout for this user
 687         unsigned long class_regtimeout = 90;
 688         int class_flood = 0;
 689         long class_threshold = 5;
 690         long class_sqmax = 262144;      // 256kb
 691         long class_rqmax = 4096;        // 4k
 692
 693         for (ClassVector::iterator i = Config->Classes.begin(); i != Config->Classes.end(); i++)
 694         {
 695                 if (match(clientlist[tempnick]->host,i->host) && (i->type == CC_ALLOW))
 696                 {
 697                         class_regtimeout = (unsigned long)i->registration_timeout;
 698                         class_flood = i->flood;
 699                         clientlist[tempnick]->pingmax = i->pingtime;
 700                         class_threshold = i->threshold;
 701                         class_sqmax = i->sendqmax;
 702                         class_rqmax = i->recvqmax;
 703                         break;
 704                 }
 705         }
 706
 707         clientlist[tempnick]->nping = TIME+clientlist[tempnick]->pingmax + Config->dns_timeout;
 708         clientlist[tempnick]->timeout = TIME+class_regtimeout;
 709         clientlist[tempnick]->flood = class_flood;
 710         clientlist[tempnick]->threshold = class_threshold;
 711         clientlist[tempnick]->sendqmax = class_sqmax;
 712         clientlist[tempnick]->recvqmax = class_rqmax;
 713
 714         ucrec a;
 715         a.channel = NULL;
 716         a.uc_modes = 0;
 717         for (int i = 0; i < MAXCHANS; i++)
 718                 clientlist[tempnick]->chans.push_back(a);
 719
 720         if (clientlist.size() > Config->SoftLimit)
 721         {
 722                 kill_link(clientlist[tempnick],"No more connections allowed");
 723                 return;
 724         }
 725
 726         if (clientlist.size() >= MAXCLIENTS)
 727         {
 728                 kill_link(clientlist[tempnick],"No more connections allowed");
 729                 return;
 730         }
 731
 732         // this is done as a safety check to keep the file descriptors within range of fd_ref_table.
 733         // its a pretty big but for the moment valid assumption:
 734         // file descriptors are handed out starting at 0, and are recycled as theyre freed.
 735         // therefore if there is ever an fd over 65535, 65536 clients must be connected to the
 736         // irc server at once (or the irc server otherwise initiating this many connections, files etc)
 737         // which for the time being is a physical impossibility (even the largest networks dont have more
 738         // than about 10,000 users on ONE server!)
 739         if ((unsigned)socket > 65534)
 740         {
 741                 kill_link(clientlist[tempnick],"Server is full");
 742                 return;
 743         }
 744
 745
 746         char* e = matches_exception(ip);
 747         if (!e)
 748         {
 749                 char* r = matches_zline(ip);
 750                 if (r)
 751                 {
 752                         char reason[MAXBUF];
 753                         snprintf(reason,MAXBUF,"Z-Lined: %s",r);
 754                         kill_link(clientlist[tempnick],reason);
 755                         return;
 756                 }
 757         }
 758         fd_ref_table[socket] = clientlist[tempnick];
 759         SE->AddFd(socket,true,X_ESTAB_CLIENT);
 760 }
 761
 762 /* shows the message of the day, and any other on-logon stuff */
 763 void FullConnectUser(userrec* user)
 764 {
 765         stats->statsConnects++;
 766         user->idle_lastmsg = TIME;
 767         log(DEBUG,"ConnectUser: %s",user->nick);
 768
 769         if ((strcmp(Passwd(user),"")) && (!user->haspassed))
 770         {
 771                 kill_link(user,"Invalid password");
 772                 return;
 773         }
 774         if (IsDenied(user))
 775         {
 776                 kill_link(user,"Unauthorised connection");
 777                 return;
 778         }
 779
 780         char match_against[MAXBUF];
 781         snprintf(match_against,MAXBUF,"%s@%s",user->ident,user->host);
 782         char* e = matches_exception(match_against);
 783         if (!e)
 784         {
 785                 char* r = matches_gline(match_against);
 786                 if (r)
 787                 {
 788                         char reason[MAXBUF];
 789                         snprintf(reason,MAXBUF,"G-Lined: %s",r);
 790                         kill_link_silent(user,reason);
 791                         return;
 792                 }
 793                 r = matches_kline(user->host);
 794                 if (r)
 795                 {
 796                         char reason[MAXBUF];
 797                         snprintf(reason,MAXBUF,"K-Lined: %s",r);
 798                         kill_link_silent(user,reason);
 799                         return;
 800                 }
 801         }
 802
 803
 804         WriteServ(user->fd,"NOTICE Auth :Welcome to \002%s\002!",Config->Network);
 805         WriteServ(user->fd,"001 %s :Welcome to the %s IRC Network %s!%s@%s",user->nick,Config->Network,user->nick,user->ident,user->host);
 806         WriteServ(user->fd,"002 %s :Your host is %s, running version %s",user->nick,Config->ServerName,VERSION);
 807         WriteServ(user->fd,"003 %s :This server was created %s %s",user->nick,__TIME__,__DATE__);
 808         WriteServ(user->fd,"004 %s %s %s iowghraAsORVSxNCWqBzvdHtGI lvhopsmntikrRcaqOALQbSeKVfHGCuzN",user->nick,Config->ServerName,VERSION);
 809         // the neatest way to construct the initial 005 numeric, considering the number of configure constants to go in it...
 810         std::stringstream v;
 811         v << "WALLCHOPS MODES=13 CHANTYPES=# PREFIX=(ohv)@%+ MAP SAFELIST MAXCHANNELS=" << MAXCHANS;
 812         v << " MAXBANS=60 NICKLEN=" << NICKMAX;
 813         v << " TOPICLEN=" << MAXTOPIC << " KICKLEN=" << MAXKICK << " MAXTARGETS=20 AWAYLEN=" << MAXAWAY << " CHANMODES=ohvb,k,l,psmnti NETWORK=";
 814         v << Config->Network;
 815         std::string data005 = v.str();
 816         FOREACH_MOD On005Numeric(data005);
 817         // anfl @ #ratbox, efnet reminded me that according to the RFC this cant contain more than 13 tokens per line...
 818         // so i'd better split it :)
 819         std::stringstream out(data005);
 820         std::string token = "";
 821         std::string line5 = "";
 822         int token_counter = 0;
 823         while (!out.eof())
 824         {
 825                 out >> token;
 826                 line5 = line5 + token + " ";
 827                 token_counter++;
 828                 if ((token_counter >= 13) || (out.eof() == true))
 829                 {
 830                         WriteServ(user->fd,"005 %s %s:are supported by this server",user->nick,line5.c_str());
 831                         line5 = "";
 832                         token_counter = 0;
 833                 }
 834         }
 835         ShowMOTD(user);
 836
 837         // fix 3 by brain, move registered = 7 below these so that spurious modes and host changes dont go out
 838         // onto the network and produce 'fake direction'
 839         FOREACH_MOD OnUserConnect(user);
 840         FOREACH_MOD OnGlobalConnect(user);
 841         user->registered = 7;
 842         WriteOpers("*** Client connecting on port %lu: %s!%s@%s [%s]",(unsigned long)user->port,user->nick,user->ident,user->host,user->ip);
 843 }
 844
 845
 846 /* shows the message of the day, and any other on-logon stuff */
 847 void ConnectUser(userrec *user)
 848 {
 849         // dns is already done, things are fast. no need to wait for dns to complete just pass them straight on
 850         if ((user->dns_done) && (user->registered >= 3) && (AllModulesReportReady(user)))
 851         {
 852                 FullConnectUser(user);
 853         }
 854 }
 855
 856 std::string GetVersionString()
 857 {
 858         char versiondata[MAXBUF];
 859 #ifdef THREADED_DNS
 860         char dnsengine[] = "multithread";
 861 #else
 862         char dnsengine[] = "singlethread";
 863 #endif
 864         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);
 865         return versiondata;
 866 }
 867
 868 void handle_version(char **parameters, int pcnt, userrec *user)
 869 {
 870         WriteServ(user->fd,"351 %s :%s",user->nick,GetVersionString().c_str());
 871 }
 872
 873
 874 bool is_valid_cmd(const char* commandname, int pcnt, userrec * user)
 875 {
 876         for (unsigned int i = 0; i < cmdlist.size(); i++)
 877         {
 878                 if (!strcasecmp(cmdlist[i].command,commandname))
 879                 {
 880                         if (cmdlist[i].handler_function)
 881                         {
 882                                 if ((pcnt>=cmdlist[i].min_params) && (strcasecmp(cmdlist[i].source,"<core>")))
 883                                 {
 884                                         if ((strchr(user->modes,cmdlist[i].flags_needed)) || (!cmdlist[i].flags_needed))
 885                                         {
 886                                                 if (cmdlist[i].flags_needed)
 887                                                 {
 888                                                         if ((user->HasPermission((char*)commandname)) || (is_uline(user->server)))
 889                                                         {
 890                                                                 return true;
 891                                                         }
 892                                                         else
 893                                                         {
 894                                                                 return false;
 895                                                         }
 896                                                 }
 897                                                 return true;
 898                                         }
 899                                 }
 900                         }
 901                 }
 902         }
 903         return false;
 904 }
 905
 906 // calls a handler function for a command
 907
 908 void call_handler(const char* commandname,char **parameters, int pcnt, userrec *user)
 909 {
 910         for (unsigned int i = 0; i < cmdlist.size(); i++)
 911         {
 912                 if (!strcasecmp(cmdlist[i].command,commandname))
 913                 {
 914                         if (cmdlist[i].handler_function)
 915                         {
 916                                 if (pcnt>=cmdlist[i].min_params)
 917                                 {
 918                                         if ((strchr(user->modes,cmdlist[i].flags_needed)) || (!cmdlist[i].flags_needed))
 919                                         {
 920                                                 if (cmdlist[i].flags_needed)
 921                                                 {
 922                                                         if ((user->HasPermission((char*)commandname)) || (is_uline(user->server)))
 923                                                         {
 924                                                                 cmdlist[i].handler_function(parameters,pcnt,user);
 925                                                         }
 926                                                 }
 927                                                 else
 928                                                 {
 929                                                         cmdlist[i].handler_function(parameters,pcnt,user);
 930                                                 }
 931                                         }
 932                                 }
 933                         }
 934                 }
 935         }
 936 }
 937
 938
 939 void force_nickchange(userrec* user,const char* newnick)
 940 {
 941         char nick[MAXBUF];
 942         int MOD_RESULT = 0;
 943
 944         strcpy(nick,"");
 945
 946         FOREACH_RESULT(OnUserPreNick(user,newnick));
 947         if (MOD_RESULT) {
 948                 stats->statsCollisions++;
 949                 kill_link(user,"Nickname collision");
 950                 return;
 951         }
 952         if (matches_qline(newnick))
 953         {
 954                 stats->statsCollisions++;
 955                 kill_link(user,"Nickname collision");
 956                 return;
 957         }
 958
 959         if (user)
 960         {
 961                 if (newnick)
 962                 {
 963                         strncpy(nick,newnick,MAXBUF);
 964                 }
 965                 if (user->registered == 7)
 966                 {
 967                         char* pars[1];
 968                         pars[0] = nick;
 969                         handle_nick(pars,1,user);
 970                 }
 971         }
 972 }
 973
 974
 975 int process_parameters(char **command_p,char *parameters)
 976 {
 977         int j = 0;
 978         int q = strlen(parameters);
 979         if (!q)
 980         {
 981                 /* no parameters, command_p invalid! */
 982                 return 0;
 983         }
 984         if (parameters[0] == ':')
 985         {
 986                 command_p[0] = parameters+1;
 987                 return 1;
 988         }
 989         if (q)
 990         {
 991                 if ((strchr(parameters,' ')==NULL) || (parameters[0] == ':'))
 992                 {
 993                         /* only one parameter */
 994                         command_p[0] = parameters;
 995                         if (parameters[0] == ':')
 996                         {
 997                                 if (strchr(parameters,' ') != NULL)
 998                                 {
 999                                         command_p[0]++;
1000                                 }
1001                         }
1002                         return 1;
1003                 }
1004         }
1005         command_p[j++] = parameters;
1006         for (int i = 0; i <= q; i++)
1007         {
1008                 if (parameters[i] == ' ')
1009                 {
1010                         command_p[j++] = parameters+i+1;
1011                         parameters[i] = '\0';
1012                         if (command_p[j-1][0] == ':')
1013                         {
1014                                 *command_p[j-1]++; /* remove dodgy ":" */
1015                                 break;
1016                                 /* parameter like this marks end of the sequence */
1017                         }
1018                 }
1019         }
1020         return j; /* returns total number of items in the list */
1021 }
1022
1023 void process_command(userrec *user, char* cmd)
1024 {
1025         char *parameters;
1026         char *command;
1027         char *command_p[127];
1028         char p[MAXBUF], temp[MAXBUF];
1029         int j, items, cmd_found;
1030
1031         for (int i = 0; i < 127; i++)
1032                 command_p[i] = NULL;
1033
1034         if (!user)
1035         {
1036                 return;
1037         }
1038         if (!cmd)
1039         {
1040                 return;
1041         }
1042         if (!cmd[0])
1043         {
1044                 return;
1045         }
1046
1047         int total_params = 0;
1048         if (strlen(cmd)>2)
1049         {
1050                 for (unsigned int q = 0; q < strlen(cmd)-1; q++)
1051                 {
1052                         if ((cmd[q] == ' ') && (cmd[q+1] == ':'))
1053                         {
1054                                 total_params++;
1055                                 // found a 'trailing', we dont count them after this.
1056                                 break;
1057                         }
1058                         if (cmd[q] == ' ')
1059                                 total_params++;
1060                 }
1061         }
1062
1063         // another phidjit bug...
1064         if (total_params > 126)
1065         {
1066                 *(strchr(cmd,' ')) = '\0';
1067                 WriteServ(user->fd,"421 %s %s :Too many parameters given",user->nick,cmd);
1068                 return;
1069         }
1070
1071         strlcpy(temp,cmd,MAXBUF);
1072
1073         std::string tmp = cmd;
1074         for (int i = 0; i <= MODCOUNT; i++)
1075         {
1076                 std::string oldtmp = tmp;
1077                 modules[i]->OnServerRaw(tmp,true,user);
1078                 if (oldtmp != tmp)
1079                 {
1080                         log(DEBUG,"A Module changed the input string!");
1081                         log(DEBUG,"New string: %s",tmp.c_str());
1082                         log(DEBUG,"Old string: %s",oldtmp.c_str());
1083                         break;
1084                 }
1085         }
1086         strlcpy(cmd,tmp.c_str(),MAXBUF);
1087         strlcpy(temp,cmd,MAXBUF);
1088
1089         if (!strchr(cmd,' '))
1090         {
1091                 /* no parameters, lets skip the formalities and not chop up
1092                  * the string */
1093                 log(DEBUG,"About to preprocess command with no params");
1094                 items = 0;
1095                 command_p[0] = NULL;
1096                 parameters = NULL;
1097                 for (unsigned int i = 0; i <= strlen(cmd); i++)
1098                 {
1099                         cmd[i] = toupper(cmd[i]);
1100                 }
1101                 command = cmd;
1102         }
1103         else
1104         {
1105                 strcpy(cmd,"");
1106                 j = 0;
1107                 /* strip out extraneous linefeeds through mirc's crappy pasting (thanks Craig) */
1108                 for (unsigned int i = 0; i < strlen(temp); i++)
1109                 {
1110                         if ((temp[i] != 10) && (temp[i] != 13) && (temp[i] != 0) && (temp[i] != 7))
1111                         {
1112                                 cmd[j++] = temp[i];
1113                                 cmd[j] = 0;
1114                         }
1115                 }
1116                 /* split the full string into a command plus parameters */
1117                 parameters = p;
1118                 strcpy(p," ");
1119                 command = cmd;
1120                 if (strchr(cmd,' '))
1121                 {
1122                         for (unsigned int i = 0; i <= strlen(cmd); i++)
1123                         {
1124                                 /* capitalise the command ONLY, leave params intact */
1125                                 cmd[i] = toupper(cmd[i]);
1126                                 /* are we nearly there yet?! :P */
1127                                 if (cmd[i] == ' ')
1128                                 {
1129                                         command = cmd;
1130                                         parameters = cmd+i+1;
1131                                         cmd[i] = '\0';
1132                                         break;
1133                                 }
1134                         }
1135                 }
1136                 else
1137                 {
1138                         for (unsigned int i = 0; i <= strlen(cmd); i++)
1139                         {
1140                                 cmd[i] = toupper(cmd[i]);
1141                         }
1142                 }
1143
1144         }
1145         cmd_found = 0;
1146
1147         if (strlen(command)>MAXCOMMAND)
1148         {
1149                 WriteServ(user->fd,"421 %s %s :Command too long",user->nick,command);
1150                 return;
1151         }
1152
1153         for (unsigned int x = 0; x < strlen(command); x++)
1154         {
1155                 if (((command[x] < 'A') || (command[x] > 'Z')) && (command[x] != '.'))
1156                 {
1157                         if (((command[x] < '0') || (command[x]> '9')) && (command[x] != '-'))
1158                         {
1159                                 if (strchr("@!\"$%^&*(){}[]_=+;:'#~,<>/?\\|`",command[x]))
1160                                 {
1161                                         stats->statsUnknown++;
1162                                         WriteServ(user->fd,"421 %s %s :Unknown command",user->nick,command);
1163                                         return;
1164                                 }
1165                         }
1166                 }
1167         }
1168
1169         for (unsigned int i = 0; i != cmdlist.size(); i++)
1170         {
1171                 if (cmdlist[i].command[0])
1172                 {
1173                         if (strlen(command)>=(strlen(cmdlist[i].command))) if (!strncmp(command, cmdlist[i].command,MAXCOMMAND))
1174                         {
1175                                 if (parameters)
1176                                 {
1177                                         if (parameters[0])
1178                                         {
1179                                                 items = process_parameters(command_p,parameters);
1180                                         }
1181                                         else
1182                                         {
1183                                                 items = 0;
1184                                                 command_p[0] = NULL;
1185                                         }
1186                                 }
1187                                 else
1188                                 {
1189                                         items = 0;
1190                                         command_p[0] = NULL;
1191                                 }
1192
1193                                 if (user)
1194                                 {
1195                                         /* activity resets the ping pending timer */
1196                                         user->nping = TIME + user->pingmax;
1197                                         if ((items) < cmdlist[i].min_params)
1198                                         {
1199                                                 log(DEBUG,"process_command: not enough parameters: %s %s",user->nick,command);
1200                                                 WriteServ(user->fd,"461 %s %s :Not enough parameters",user->nick,command);
1201                                                 return;
1202                                         }
1203                                         if ((!strchr(user->modes,cmdlist[i].flags_needed)) && (cmdlist[i].flags_needed))
1204                                         {
1205                                                 log(DEBUG,"process_command: permission denied: %s %s",user->nick,command);
1206                                                 WriteServ(user->fd,"481 %s :Permission Denied- You do not have the required operator privilages",user->nick);
1207                                                 cmd_found = 1;
1208                                                 return;
1209                                         }
1210                                         if ((cmdlist[i].flags_needed) && (!user->HasPermission(command)))
1211                                         {
1212                                                 log(DEBUG,"process_command: permission denied: %s %s",user->nick,command);
1213                                                 WriteServ(user->fd,"481 %s :Permission Denied- Oper type %s does not have access to command %s",user->nick,user->oper,command);
1214                                                 cmd_found = 1;
1215                                                 return;
1216                                         }
1217                                         /* if the command isnt USER, PASS, or NICK, and nick is empty,
1218                                          * deny command! */
1219                                         if ((strncmp(command,"USER",4)) && (strncmp(command,"NICK",4)) && (strncmp(command,"PASS",4)))
1220                                         {
1221                                                 if ((!isnick(user->nick)) || (user->registered != 7))
1222                                                 {
1223                                                         log(DEBUG,"process_command: not registered: %s %s",user->nick,command);
1224                                                         WriteServ(user->fd,"451 %s :You have not registered",command);
1225                                                         return;
1226                                                 }
1227                                         }
1228                                         if ((user->registered == 7) && (!strchr(user->modes,'o')))
1229                                         {
1230                                                 std::stringstream dcmds(Config->DisabledCommands);
1231                                                 while (!dcmds.eof())
1232                                                 {
1233                                                         std::string thiscmd;
1234                                                         dcmds >> thiscmd;
1235                                                         if (!strcasecmp(thiscmd.c_str(),command))
1236                                                         {
1237                                                                 // command is disabled!
1238                                                                 WriteServ(user->fd,"421 %s %s :This command has been disabled.",user->nick,command);
1239                                                                 return;
1240                                                         }
1241                                                 }
1242                                         }
1243                                         if ((user->registered == 7) || (!strncmp(command,"USER",4)) || (!strncmp(command,"NICK",4)) || (!strncmp(command,"PASS",4)))
1244                                         {
1245                                                 if (cmdlist[i].handler_function)
1246                                                 {
1247
1248                                                         /* ikky /stats counters */
1249                                                         if (temp)
1250                                                         {
1251                                                                 cmdlist[i].use_count++;
1252                                                                 cmdlist[i].total_bytes+=strlen(temp);
1253                                                         }
1254
1255                                                         int MOD_RESULT = 0;
1256                                                         FOREACH_RESULT(OnPreCommand(command,command_p,items,user));
1257                                                         if (MOD_RESULT == 1) {
1258                                                                 return;
1259                                                         }
1260
1261                                                         /* WARNING: nothing may come after the
1262                                                          * command handler call, as the handler
1263                                                          * may free the user structure! */
1264
1265                                                         cmdlist[i].handler_function(command_p,items,user);
1266                                                 }
1267                                                 return;
1268                                         }
1269                                         else
1270                                         {
1271                                                 WriteServ(user->fd,"451 %s :You have not registered",command);
1272                                                 return;
1273                                         }
1274                                 }
1275                                 cmd_found = 1;
1276                         }
1277                 }
1278         }
1279         if ((!cmd_found) && (user))
1280         {
1281                 stats->statsUnknown++;
1282                 WriteServ(user->fd,"421 %s %s :Unknown command",user->nick,command);
1283         }
1284 }
1285
1286 bool removecommands(const char* source)
1287 {
1288         bool go_again = true;
1289         while (go_again)
1290         {
1291                 go_again = false;
1292                 for (std::deque<command_t>::iterator i = cmdlist.begin(); i != cmdlist.end(); i++)
1293                 {
1294                         if (!strcmp(i->source,source))
1295                         {
1296                                 log(DEBUG,"removecommands(%s) Removing dependent command: %s",i->source,i->command);
1297                                 cmdlist.erase(i);
1298                                 go_again = true;
1299                                 break;
1300                         }
1301                 }
1302         }
1303         return true;
1304 }
1305
1306
1307 void process_buffer(const char* cmdbuf,userrec *user)
1308 {
1309         if (!user)
1310         {
1311                 log(DEFAULT,"*** BUG *** process_buffer was given an invalid parameter");
1312                 return;
1313         }
1314         char cmd[MAXBUF];
1315         if (!cmdbuf)
1316         {
1317                 log(DEFAULT,"*** BUG *** process_buffer was given an invalid parameter");
1318                 return;
1319         }
1320         if (!cmdbuf[0])
1321         {
1322                 return;
1323         }
1324         while (*cmdbuf == ' ') cmdbuf++; // strip leading spaces
1325
1326         strlcpy(cmd,cmdbuf,MAXBUF);
1327         if (!cmd[0])
1328         {
1329                 return;
1330         }
1331         int sl = strlen(cmd)-1;
1332         if ((cmd[sl] == 13) || (cmd[sl] == 10))
1333         {
1334                 cmd[sl] = '\0';
1335         }
1336         sl = strlen(cmd)-1;
1337         if ((cmd[sl] == 13) || (cmd[sl] == 10))
1338         {
1339                 cmd[sl] = '\0';
1340         }
1341         sl = strlen(cmd)-1;
1342         while (cmd[sl] == ' ') // strip trailing spaces
1343         {
1344                 cmd[sl] = '\0';
1345                 sl = strlen(cmd)-1;
1346         }
1347
1348         if (!cmd[0])
1349         {
1350                 return;
1351         }
1352         log(DEBUG,"CMDIN: %s %s",user->nick,cmd);
1353         tidystring(cmd);
1354         if ((user) && (cmd))
1355         {
1356                 process_command(user,cmd);
1357         }
1358 }
1359
1360 char MODERR[MAXBUF];
1361
1362 char* 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 = this->module_sockets.begin(); a < this->module_sockets.end(); a++)
1614                                                 {
1615                                                         s_del = (InspSocket*)*a;
1616                                                         if ((s_del) && (s_del->GetFd() == activefds[activefd]))
1617                                                         {
1618                                                                 this->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