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 int WHOWAS_STALE = 48; // default WHOWAS Entries last 2 days before they go 'stale'
  66 int WHOWAS_MAX = 100;  // default 100 people maximum in the WHOWAS list
  67 int DieDelay  =  5;
  68 time_t startup_time = time(NULL);
  69
  70 extern std::vector<Module*> modules;
  71 extern std::vector<ircd_module*> factory;
  72
  73 std::vector<InspSocket*> module_sockets;
  74
  75 extern int MODCOUNT;
  76 int openSockfd[MAXSOCKS];
  77 struct sockaddr_in client,server;
  78 socklen_t length;
  79
  80 extern InspSocket* socket_ref[65535];
  81
  82 time_t TIME = time(NULL), OLDTIME = time(NULL);
  83
  84 SocketEngine* SE = NULL;
  85
  86 // This table references users by file descriptor.
  87 // its an array to make it VERY fast, as all lookups are referenced
  88 // by an integer, meaning there is no need for a scan/search operation.
  89 userrec* fd_ref_table[65536];
  90
  91 serverstats* stats = new serverstats;
  92 Server* MyServer = new Server;
  93 ServerConfig *Config = new ServerConfig;
  94
  95 user_hash clientlist;
  96 chan_hash chanlist;
  97 whowas_hash whowas;
  98 command_table cmdlist;
  99 address_cache IP;
 100 servernamelist servernames;
 101 int boundPortCount = 0;
 102 int portCount = 0, ports[MAXSOCKS];
 103 std::vector<userrec*> all_opers;
 104 char lowermap[255];
 105
 106
 107 void AddOper(userrec* user)
 108 {
 109         log(DEBUG,"Oper added to optimization list");
 110         all_opers.push_back(user);
 111 }
 112
 113 void AddServerName(std::string servername)
 114 {
 115         log(DEBUG,"Adding server name: %s",servername.c_str());
 116         for (servernamelist::iterator a = servernames.begin(); a < servernames.end(); a++)
 117         {
 118                 if (*a == servername)
 119                         return;
 120         }
 121         servernames.push_back(servername);
 122 }
 123
 124 const char* FindServerNamePtr(std::string servername)
 125 {
 126         for (servernamelist::iterator a = servernames.begin(); a < servernames.end(); a++)
 127         {
 128                 if (*a == servername)
 129                         return a->c_str();
 130         }
 131         AddServerName(servername);
 132         return FindServerNamePtr(servername);
 133 }
 134
 135 void DeleteOper(userrec* user)
 136 {
 137         for (std::vector<userrec*>::iterator a = all_opers.begin(); a < all_opers.end(); a++)
 138         {
 139                 if (*a == user)
 140                 {
 141                         log(DEBUG,"Oper removed from optimization list");
 142                         all_opers.erase(a);
 143                         return;
 144                 }
 145         }
 146 }
 147
 148 std::string GetRevision()
 149 {
 150         /* w00t got me to replace a bunch of strtok_r
 151          * with something nicer, so i did this. Its the
 152          * same thing really, only in C++. It places the
 153          * text into a std::stringstream which is a readable
 154          * and writeable buffer stream, and then pops two
 155          * words off it, space delimited. Because it reads
 156          * into the same variable twice, the first word
 157          * is discarded, and the second one returned.
 158          */
 159         std::stringstream Revision("$Revision$");
 160         std::string single;
 161         Revision >> single >> single;
 162         return single;
 163 }
 164
 165
 166 /* This function pokes and hacks at a parameter list like the following:
 167  *
 168  * PART #winbot,#darkgalaxy :m00!
 169  *
 170  * to turn it into a series of individual calls like this:
 171  *
 172  * PART #winbot :m00!
 173  * PART #darkgalaxy :m00!
 174  *
 175  * The seperate calls are sent to a callback function provided by the caller
 176  * (the caller will usually call itself recursively). The callback function
 177  * must be a command handler. Calling this function on a line with no list causes
 178  * no action to be taken. You must provide a starting and ending parameter number
 179  * where the range of the list can be found, useful if you have a terminating
 180  * parameter as above which is actually not part of the list, or parameters
 181  * before the actual list as well. This code is used by many functions which
 182  * can function as "one to list" (see the RFC) */
 183
 184 int loop_call(handlerfunc fn, char **parameters, int pcnt, userrec *u, int start, int end, int joins)
 185 {
 186         char plist[MAXBUF];
 187         char *param;
 188         char *pars[32];
 189         char blog[32][MAXBUF];
 190         char blog2[32][MAXBUF];
 191         int j = 0, q = 0, total = 0, t = 0, t2 = 0, total2 = 0;
 192         char keystr[MAXBUF];
 193         char moo[MAXBUF];
 194
 195         for (int i = 0; i <32; i++)
 196                 strcpy(blog[i],"");
 197
 198         for (int i = 0; i <32; i++)
 199                 strcpy(blog2[i],"");
 200
 201         strcpy(moo,"");
 202         for (int i = 0; i <10; i++)
 203         {
 204                 if (!parameters[i])
 205                 {
 206                         parameters[i] = moo;
 207                 }
 208         }
 209         if (joins)
 210         {
 211                 if (pcnt > 1) /* we have a key to copy */
 212                 {
 213                         strlcpy(keystr,parameters[1],MAXBUF);
 214                 }
 215         }
 216
 217         if (!parameters[start])
 218         {
 219                 return 0;
 220         }
 221         if (!strchr(parameters[start],','))
 222         {
 223                 return 0;
 224         }
 225         strcpy(plist,"");
 226         for (int i = start; i <= end; i++)
 227         {
 228                 if (parameters[i])
 229                 {
 230                         strlcat(plist,parameters[i],MAXBUF);
 231                 }
 232         }
 233
 234         j = 0;
 235         param = plist;
 236
 237         t = strlen(plist);
 238         for (int i = 0; i < t; i++)
 239         {
 240                 if (plist[i] == ',')
 241                 {
 242                         plist[i] = '\0';
 243                         strlcpy(blog[j++],param,MAXBUF);
 244                         param = plist+i+1;
 245                         if (j>20)
 246                         {
 247                                 WriteServ(u->fd,"407 %s %s :Too many targets in list, message not delivered.",u->nick,blog[j-1]);
 248                                 return 1;
 249                         }
 250                 }
 251         }
 252         strlcpy(blog[j++],param,MAXBUF);
 253         total = j;
 254
 255         if ((joins) && (keystr) && (total>0)) // more than one channel and is joining
 256         {
 257                 strcat(keystr,",");
 258         }
 259
 260         if ((joins) && (keystr))
 261         {
 262                 if (strchr(keystr,','))
 263                 {
 264                         j = 0;
 265                         param = keystr;
 266                         t2 = strlen(keystr);
 267                         for (int i = 0; i < t2; i++)
 268                         {
 269                                 if (keystr[i] == ',')
 270                                 {
 271                                         keystr[i] = '\0';
 272                                         strlcpy(blog2[j++],param,MAXBUF);
 273                                         param = keystr+i+1;
 274                                 }
 275                         }
 276                         strlcpy(blog2[j++],param,MAXBUF);
 277                         total2 = j;
 278                 }
 279         }
 280
 281         for (j = 0; j < total; j++)
 282         {
 283                 if (blog[j])
 284                 {
 285                         pars[0] = blog[j];
 286                 }
 287                 for (q = end; q < pcnt-1; q++)
 288                 {
 289                         if (parameters[q+1])
 290                         {
 291                                 pars[q-end+1] = parameters[q+1];
 292                         }
 293                 }
 294                 if ((joins) && (parameters[1]))
 295                 {
 296                         if (pcnt > 1)
 297                         {
 298                                 pars[1] = blog2[j];
 299                         }
 300                         else
 301                         {
 302                                 pars[1] = NULL;
 303                         }
 304                 }
 305                 /* repeatedly call the function with the hacked parameter list */
 306                 if ((joins) && (pcnt > 1))
 307                 {
 308                         if (pars[1])
 309                         {
 310                                 // pars[1] already set up and containing key from blog2[j]
 311                                 fn(pars,2,u);
 312                         }
 313                         else
 314                         {
 315                                 pars[1] = parameters[1];
 316                                 fn(pars,2,u);
 317                         }
 318                 }
 319                 else
 320                 {
 321                         fn(pars,pcnt-(end-start),u);
 322                 }
 323         }
 324
 325         return 1;
 326 }
 327
 328
 329
 330 void kill_link(userrec *user,const char* r)
 331 {
 332         user_hash::iterator iter = clientlist.find(user->nick);
 333
 334         char reason[MAXBUF];
 335
 336         strncpy(reason,r,MAXBUF);
 337
 338         if (strlen(reason)>MAXQUIT)
 339         {
 340                 reason[MAXQUIT-1] = '\0';
 341         }
 342
 343         log(DEBUG,"kill_link: %s '%s'",user->nick,reason);
 344         Write(user->fd,"ERROR :Closing link (%s@%s) [%s]",user->ident,user->host,reason);
 345         log(DEBUG,"closing fd %lu",(unsigned long)user->fd);
 346
 347         if (user->registered == 7) {
 348                 FOREACH_MOD OnUserQuit(user,reason);
 349                 WriteCommonExcept(user,"QUIT :%s",reason);
 350         }
 351
 352         user->FlushWriteBuf();
 353
 354         FOREACH_MOD OnUserDisconnect(user);
 355
 356         if (user->fd > -1)
 357         {
 358                 FOREACH_MOD OnRawSocketClose(user->fd);
 359                 SE->DelFd(user->fd);
 360                 user->CloseSocket();
 361         }
 362
 363         // this must come before the WriteOpers so that it doesnt try to fill their buffer with anything
 364         // if they were an oper with +s.
 365         if (user->registered == 7) {
 366                 purge_empty_chans(user);
 367                 // fix by brain: only show local quits because we only show local connects (it just makes SENSE)
 368                 if (user->fd > -1)
 369                         WriteOpers("*** Client exiting: %s!%s@%s [%s]",user->nick,user->ident,user->host,reason);
 370                 AddWhoWas(user);
 371         }
 372
 373         if (iter != clientlist.end())
 374         {
 375                 log(DEBUG,"deleting user hash value %lu",(unsigned long)user);
 376                 if (user->fd > -1)
 377                         fd_ref_table[user->fd] = NULL;
 378                 clientlist.erase(iter);
 379         }
 380         delete user;
 381 }
 382
 383 void kill_link_silent(userrec *user,const char* r)
 384 {
 385         user_hash::iterator iter = clientlist.find(user->nick);
 386
 387         char reason[MAXBUF];
 388
 389         strncpy(reason,r,MAXBUF);
 390
 391         if (strlen(reason)>MAXQUIT)
 392         {
 393                 reason[MAXQUIT-1] = '\0';
 394         }
 395
 396         log(DEBUG,"kill_link: %s '%s'",user->nick,reason);
 397         Write(user->fd,"ERROR :Closing link (%s@%s) [%s]",user->ident,user->host,reason);
 398         log(DEBUG,"closing fd %lu",(unsigned long)user->fd);
 399
 400         user->FlushWriteBuf();
 401
 402         if (user->registered == 7) {
 403                 FOREACH_MOD OnUserQuit(user,reason);
 404                 WriteCommonExcept(user,"QUIT :%s",reason);
 405         }
 406
 407         FOREACH_MOD OnUserDisconnect(user);
 408
 409         if (user->fd > -1)
 410         {
 411                 FOREACH_MOD OnRawSocketClose(user->fd);
 412                 SE->DelFd(user->fd);
 413                 user->CloseSocket();
 414         }
 415
 416         if (user->registered == 7) {
 417                 purge_empty_chans(user);
 418         }
 419
 420         if (iter != clientlist.end())
 421         {
 422                 log(DEBUG,"deleting user hash value %lu",(unsigned long)user);
 423                 if (user->fd > -1)
 424                         fd_ref_table[user->fd] = NULL;
 425                 clientlist.erase(iter);
 426         }
 427         delete user;
 428 }
 429
 430
 431 InspIRCd::InspIRCd(int argc, char** argv)
 432 {
 433         Start();
 434         srand(time(NULL));
 435         log(DEBUG,"*** InspIRCd starting up!");
 436         if (!FileExists(CONFIG_FILE))
 437         {
 438                 printf("ERROR: Cannot open config file: %s\nExiting...\n",CONFIG_FILE);
 439                 log(DEFAULT,"main: no config");
 440                 printf("ERROR: Your config file is missing, this IRCd will self destruct in 10 seconds!\n");
 441                 Exit(ERROR);
 442         }
 443         if (argc > 1) {
 444                 for (int i = 1; i < argc; i++)
 445                 {
 446                         if (!strcmp(argv[i],"-nofork")) {
 447                                 Config->nofork = true;
 448                         }
 449                         if (!strcmp(argv[i],"-wait")) {
 450                                 sleep(6);
 451                         }
 452                         if (!strcmp(argv[i],"-nolimit")) {
 453                                 Config->unlimitcore = true;
 454                         }
 455                 }
 456         }
 457
 458         strlcpy(Config->MyExecutable,argv[0],MAXBUF);
 459
 460         // initialize the lowercase mapping table
 461         for (unsigned int cn = 0; cn < 256; cn++)
 462                 lowermap[cn] = cn;
 463         // lowercase the uppercase chars
 464         for (unsigned int cn = 65; cn < 91; cn++)
 465                 lowermap[cn] = tolower(cn);
 466         // now replace the specific chars for scandanavian comparison
 467         lowermap[(unsigned)'['] = '{';
 468         lowermap[(unsigned)']'] = '}';
 469         lowermap[(unsigned)'\\'] = '|';
 470
 471
 472         OpenLog(argv, argc);
 473         Config->ClearStack();
 474         Config->Read(true,NULL);
 475         CheckRoot();
 476         SetupCommandTable();
 477         AddServerName(Config->ServerName);
 478         CheckDie();
 479         boundPortCount = BindPorts();
 480
 481         printf("\n");
 482         startup_time = time(NULL);
 483
 484         if (!Config->nofork)
 485         {
 486                 if (DaemonSeed() == ERROR)
 487                 {
 488                         printf("ERROR: could not go into daemon mode. Shutting down.\n");
 489                         Exit(ERROR);
 490                 }
 491         }
 492
 493         /* Because of limitations in kqueue on freebsd, we must fork BEFORE we
 494          * initialize the socket engine.
 495          */
 496         SE = new SocketEngine();
 497
 498         /* We must load the modules AFTER initializing the socket engine, now */
 499         LoadAllModules();
 500
 501         printf("\nInspIRCd is now running!\n");
 502
 503         return;
 504 }
 505
 506 template<typename T> inline string ConvToStr(const T &in)
 507 {
 508         stringstream tmp;
 509         if (!(tmp << in)) return string();
 510         return tmp.str();
 511 }
 512
 513 /* re-allocates a nick in the user_hash after they change nicknames,
 514  * returns a pointer to the new user as it may have moved */
 515
 516 userrec* ReHashNick(char* Old, char* New)
 517 {
 518         //user_hash::iterator newnick;
 519         user_hash::iterator oldnick = clientlist.find(Old);
 520
 521         log(DEBUG,"ReHashNick: %s %s",Old,New);
 522
 523         if (!strcasecmp(Old,New))
 524         {
 525                 log(DEBUG,"old nick is new nick, skipping");
 526                 return oldnick->second;
 527         }
 528
 529         if (oldnick == clientlist.end()) return NULL; /* doesnt exist */
 530
 531         log(DEBUG,"ReHashNick: Found hashed nick %s",Old);
 532
 533         userrec* olduser = oldnick->second;
 534         clientlist[New] = olduser;
 535         clientlist.erase(oldnick);
 536
 537         log(DEBUG,"ReHashNick: Nick rehashed as %s",New);
 538
 539         return clientlist[New];
 540 }
 541
 542 /* adds or updates an entry in the whowas list */
 543 void AddWhoWas(userrec* u)
 544 {
 545         whowas_hash::iterator iter = whowas.find(u->nick);
 546         WhoWasUser *a = new WhoWasUser();
 547         strlcpy(a->nick,u->nick,NICKMAX);
 548         strlcpy(a->ident,u->ident,IDENTMAX);
 549         strlcpy(a->dhost,u->dhost,160);
 550         strlcpy(a->host,u->host,160);
 551         strlcpy(a->fullname,u->fullname,MAXGECOS);
 552         strlcpy(a->server,u->server,256);
 553         a->signon = u->signon;
 554
 555         /* MAX_WHOWAS:   max number of /WHOWAS items
 556          * WHOWAS_STALE: number of hours before a WHOWAS item is marked as stale and
 557          *               can be replaced by a newer one
 558          */
 559
 560         if (iter == whowas.end())
 561         {
 562                 if (whowas.size() >= (unsigned)WHOWAS_MAX)
 563                 {
 564                         for (whowas_hash::iterator i = whowas.begin(); i != whowas.end(); i++)
 565                         {
 566                                 // 3600 seconds in an hour ;)
 567                                 if ((i->second->signon)<(TIME-(WHOWAS_STALE*3600)))
 568                                 {
 569                                         // delete the old one
 570                                         if (i->second) delete i->second;
 571                                         // replace with new one
 572                                         i->second = a;
 573                                         log(DEBUG,"added WHOWAS entry, purged an old record");
 574                                         return;
 575                                 }
 576                         }
 577                         // no space left and user doesnt exist. Don't leave ram in use!
 578                         log(DEBUG,"Not able to update whowas (list at WHOWAS_MAX entries and trying to add new?), freeing excess ram");
 579                         delete a;
 580                 }
 581                 else
 582                 {
 583                         log(DEBUG,"added fresh WHOWAS entry");
 584                         whowas[a->nick] = a;
 585                 }
 586         }
 587         else
 588         {
 589                 log(DEBUG,"updated WHOWAS entry");
 590                 if (iter->second) delete iter->second;
 591                 iter->second = a;
 592         }
 593 }
 594
 595 #ifdef THREADED_DNS
 596 void* dns_task(void* arg)
 597 {
 598         userrec* u = (userrec*)arg;
 599         log(DEBUG,"DNS thread for user %s",u->nick);
 600         DNS dns1;
 601         DNS dns2;
 602         std::string host;
 603         std::string ip;
 604         if (dns1.ReverseLookup(u->ip))
 605         {
 606                 log(DEBUG,"DNS Step 1");
 607                 while (!dns1.HasResult())
 608                 {
 609                         usleep(100);
 610                 }
 611                 host = dns1.GetResult();
 612                 if (host != "")
 613                 {
 614                         log(DEBUG,"DNS Step 2: '%s'",host.c_str());
 615                         if (dns2.ForwardLookup(host))
 616                         {
 617                                 while (!dns2.HasResult())
 618                                 {
 619                                         usleep(100);
 620                                 }
 621                                 ip = dns2.GetResultIP();
 622                                 log(DEBUG,"DNS Step 3 '%s'(%d) '%s'(%d)",ip.c_str(),ip.length(),u->ip,strlen(u->ip));
 623                                 if (ip == std::string(u->ip))
 624                                 {
 625                                         log(DEBUG,"DNS Step 4");
 626                                         if (host.length() < 160)
 627                                         {
 628                                                 log(DEBUG,"DNS Step 5");
 629                                                 strcpy(u->host,host.c_str());
 630                                                 strcpy(u->dhost,host.c_str());
 631                                         }
 632                                 }
 633                         }
 634                 }
 635         }
 636         u->dns_done = true;
 637         return NULL;
 638 }
 639 #endif
 640
 641 /* add a client connection to the sockets list */
 642 void AddClient(int socket, char* host, int port, bool iscached, char* ip)
 643 {
 644         string tempnick;
 645         char tn2[MAXBUF];
 646         user_hash::iterator iter;
 647
 648         tempnick = ConvToStr(socket) + "-unknown";
 649         sprintf(tn2,"%lu-unknown",(unsigned long)socket);
 650
 651         iter = clientlist.find(tempnick);
 652
 653         // fix by brain.
 654         // as these nicknames are 'RFC impossible', we can be sure nobody is going to be
 655         // using one as a registered connection. As theyre per fd, we can also safely assume
 656         // that we wont have collisions. Therefore, if the nick exists in the list, its only
 657         // used by a dead socket, erase the iterator so that the new client may reclaim it.
 658         // this was probably the cause of 'server ignores me when i hammer it with reconnects'
 659         // issue in earlier alphas/betas
 660         if (iter != clientlist.end())
 661         {
 662                 userrec* goner = iter->second;
 663                 delete goner;
 664                 clientlist.erase(iter);
 665         }
 666
 667         /*
 668          * It is OK to access the value here this way since we know
 669          * it exists, we just created it above.
 670          *
 671          * At NO other time should you access a value in a map or a
 672          * hash_map this way.
 673          */
 674         clientlist[tempnick] = new userrec();
 675
 676         NonBlocking(socket);
 677         log(DEBUG,"AddClient: %lu %s %d %s",(unsigned long)socket,host,port,ip);
 678
 679         clientlist[tempnick]->fd = socket;
 680         strlcpy(clientlist[tempnick]->nick, tn2,NICKMAX);
 681         strlcpy(clientlist[tempnick]->host, host,160);
 682         strlcpy(clientlist[tempnick]->dhost, host,160);
 683         clientlist[tempnick]->server = (char*)FindServerNamePtr(Config->ServerName);
 684         strlcpy(clientlist[tempnick]->ident, "unknown",IDENTMAX);
 685         clientlist[tempnick]->registered = 0;
 686         clientlist[tempnick]->signon = TIME + Config->dns_timeout;
 687         clientlist[tempnick]->lastping = 1;
 688         clientlist[tempnick]->port = port;
 689         strlcpy(clientlist[tempnick]->ip,ip,16);
 690
 691         // set the registration timeout for this user
 692         unsigned long class_regtimeout = 90;
 693         int class_flood = 0;
 694         long class_threshold = 5;
 695         long class_sqmax = 262144;      // 256kb
 696         long class_rqmax = 4096;        // 4k
 697
 698         for (ClassVector::iterator i = Config->Classes.begin(); i != Config->Classes.end(); i++)
 699         {
 700                 if (match(clientlist[tempnick]->host,i->host) && (i->type == CC_ALLOW))
 701                 {
 702                         class_regtimeout = (unsigned long)i->registration_timeout;
 703                         class_flood = i->flood;
 704                         clientlist[tempnick]->pingmax = i->pingtime;
 705                         class_threshold = i->threshold;
 706                         class_sqmax = i->sendqmax;
 707                         class_rqmax = i->recvqmax;
 708                         break;
 709                 }
 710         }
 711
 712         clientlist[tempnick]->nping = TIME+clientlist[tempnick]->pingmax + Config->dns_timeout;
 713         clientlist[tempnick]->timeout = TIME+class_regtimeout;
 714         clientlist[tempnick]->flood = class_flood;
 715         clientlist[tempnick]->threshold = class_threshold;
 716         clientlist[tempnick]->sendqmax = class_sqmax;
 717         clientlist[tempnick]->recvqmax = class_rqmax;
 718
 719         ucrec a;
 720         a.channel = NULL;
 721         a.uc_modes = 0;
 722         for (int i = 0; i < MAXCHANS; i++)
 723                 clientlist[tempnick]->chans.push_back(a);
 724
 725         if (clientlist.size() > Config->SoftLimit)
 726         {
 727                 kill_link(clientlist[tempnick],"No more connections allowed");
 728                 return;
 729         }
 730
 731         if (clientlist.size() >= MAXCLIENTS)
 732         {
 733                 kill_link(clientlist[tempnick],"No more connections allowed");
 734                 return;
 735         }
 736
 737         // this is done as a safety check to keep the file descriptors within range of fd_ref_table.
 738         // its a pretty big but for the moment valid assumption:
 739         // file descriptors are handed out starting at 0, and are recycled as theyre freed.
 740         // therefore if there is ever an fd over 65535, 65536 clients must be connected to the
 741         // irc server at once (or the irc server otherwise initiating this many connections, files etc)
 742         // which for the time being is a physical impossibility (even the largest networks dont have more
 743         // than about 10,000 users on ONE server!)
 744         if ((unsigned)socket > 65534)
 745         {
 746                 kill_link(clientlist[tempnick],"Server is full");
 747                 return;
 748         }
 749
 750
 751         char* e = matches_exception(ip);
 752         if (!e)
 753         {
 754                 char* r = matches_zline(ip);
 755                 if (r)
 756                 {
 757                         char reason[MAXBUF];
 758                         snprintf(reason,MAXBUF,"Z-Lined: %s",r);
 759                         kill_link(clientlist[tempnick],reason);
 760                         return;
 761                 }
 762         }
 763         fd_ref_table[socket] = clientlist[tempnick];
 764         SE->AddFd(socket,true,X_ESTAB_CLIENT);
 765 }
 766
 767 /* shows the message of the day, and any other on-logon stuff */
 768 void FullConnectUser(userrec* user)
 769 {
 770         stats->statsConnects++;
 771         user->idle_lastmsg = TIME;
 772         log(DEBUG,"ConnectUser: %s",user->nick);
 773
 774         if ((strcmp(Passwd(user),"")) && (!user->haspassed))
 775         {
 776                 kill_link(user,"Invalid password");
 777                 return;
 778         }
 779         if (IsDenied(user))
 780         {
 781                 kill_link(user,"Unauthorised connection");
 782                 return;
 783         }
 784
 785         char match_against[MAXBUF];
 786         snprintf(match_against,MAXBUF,"%s@%s",user->ident,user->host);
 787         char* e = matches_exception(match_against);
 788         if (!e)
 789         {
 790                 char* r = matches_gline(match_against);
 791                 if (r)
 792                 {
 793                         char reason[MAXBUF];
 794                         snprintf(reason,MAXBUF,"G-Lined: %s",r);
 795                         kill_link_silent(user,reason);
 796                         return;
 797                 }
 798                 r = matches_kline(user->host);
 799                 if (r)
 800                 {
 801                         char reason[MAXBUF];
 802                         snprintf(reason,MAXBUF,"K-Lined: %s",r);
 803                         kill_link_silent(user,reason);
 804                         return;
 805                 }
 806         }
 807
 808
 809         WriteServ(user->fd,"NOTICE Auth :Welcome to \002%s\002!",Config->Network);
 810         WriteServ(user->fd,"001 %s :Welcome to the %s IRC Network %s!%s@%s",user->nick,Config->Network,user->nick,user->ident,user->host);
 811         WriteServ(user->fd,"002 %s :Your host is %s, running version %s",user->nick,Config->ServerName,VERSION);
 812         WriteServ(user->fd,"003 %s :This server was created %s %s",user->nick,__TIME__,__DATE__);
 813         WriteServ(user->fd,"004 %s %s %s iowghraAsORVSxNCWqBzvdHtGI lvhopsmntikrRcaqOALQbSeKVfHGCuzN",user->nick,Config->ServerName,VERSION);
 814         // the neatest way to construct the initial 005 numeric, considering the number of configure constants to go in it...
 815         std::stringstream v;
 816         v << "WALLCHOPS MODES=13 CHANTYPES=# PREFIX=(ohv)@%+ MAP SAFELIST MAXCHANNELS=" << MAXCHANS;
 817         v << " MAXBANS=60 NICKLEN=" << NICKMAX;
 818         v << " TOPICLEN=" << MAXTOPIC << " KICKLEN=" << MAXKICK << " MAXTARGETS=20 AWAYLEN=" << MAXAWAY << " CHANMODES=ohvb,k,l,psmnti NETWORK=";
 819         v << Config->Network;
 820         std::string data005 = v.str();
 821         FOREACH_MOD On005Numeric(data005);
 822         // anfl @ #ratbox, efnet reminded me that according to the RFC this cant contain more than 13 tokens per line...
 823         // so i'd better split it :)
 824         std::stringstream out(data005);
 825         std::string token = "";
 826         std::string line5 = "";
 827         int token_counter = 0;
 828         while (!out.eof())
 829         {
 830                 out >> token;
 831                 line5 = line5 + token + " ";
 832                 token_counter++;
 833                 if ((token_counter >= 13) || (out.eof() == true))
 834                 {
 835                         WriteServ(user->fd,"005 %s %s:are supported by this server",user->nick,line5.c_str());
 836                         line5 = "";
 837                         token_counter = 0;
 838                 }
 839         }
 840         ShowMOTD(user);
 841
 842         // fix 3 by brain, move registered = 7 below these so that spurious modes and host changes dont go out
 843         // onto the network and produce 'fake direction'
 844         FOREACH_MOD OnUserConnect(user);
 845         FOREACH_MOD OnGlobalConnect(user);
 846         user->registered = 7;
 847         WriteOpers("*** Client connecting on port %lu: %s!%s@%s [%s]",(unsigned long)user->port,user->nick,user->ident,user->host,user->ip);
 848 }
 849
 850
 851 /* shows the message of the day, and any other on-logon stuff */
 852 void ConnectUser(userrec *user)
 853 {
 854         // dns is already done, things are fast. no need to wait for dns to complete just pass them straight on
 855         if ((user->dns_done) && (user->registered >= 3) && (AllModulesReportReady(user)))
 856         {
 857                 FullConnectUser(user);
 858         }
 859 }
 860
 861 std::string GetVersionString()
 862 {
 863         char versiondata[MAXBUF];
 864 #ifdef THREADED_DNS
 865         char dnsengine[] = "multithread";
 866 #else
 867         char dnsengine[] = "singlethread";
 868 #endif
 869         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);
 870         return versiondata;
 871 }
 872
 873 void handle_version(char **parameters, int pcnt, userrec *user)
 874 {
 875         WriteServ(user->fd,"351 %s :%s",user->nick,GetVersionString().c_str());
 876 }
 877
 878
 879 bool is_valid_cmd(const char* commandname, int pcnt, userrec * user)
 880 {
 881         for (unsigned int i = 0; i < cmdlist.size(); i++)
 882         {
 883                 if (!strcasecmp(cmdlist[i].command,commandname))
 884                 {
 885                         if (cmdlist[i].handler_function)
 886                         {
 887                                 if ((pcnt>=cmdlist[i].min_params) && (strcasecmp(cmdlist[i].source,"<core>")))
 888                                 {
 889                                         if ((strchr(user->modes,cmdlist[i].flags_needed)) || (!cmdlist[i].flags_needed))
 890                                         {
 891                                                 if (cmdlist[i].flags_needed)
 892                                                 {
 893                                                         if ((user->HasPermission((char*)commandname)) || (is_uline(user->server)))
 894                                                         {
 895                                                                 return true;
 896                                                         }
 897                                                         else
 898                                                         {
 899                                                                 return false;
 900                                                         }
 901                                                 }
 902                                                 return true;
 903                                         }
 904                                 }
 905                         }
 906                 }
 907         }
 908         return false;
 909 }
 910
 911 // calls a handler function for a command
 912
 913 void call_handler(const char* commandname,char **parameters, int pcnt, userrec *user)
 914 {
 915         for (unsigned int i = 0; i < cmdlist.size(); i++)
 916         {
 917                 if (!strcasecmp(cmdlist[i].command,commandname))
 918                 {
 919                         if (cmdlist[i].handler_function)
 920                         {
 921                                 if (pcnt>=cmdlist[i].min_params)
 922                                 {
 923                                         if ((strchr(user->modes,cmdlist[i].flags_needed)) || (!cmdlist[i].flags_needed))
 924                                         {
 925                                                 if (cmdlist[i].flags_needed)
 926                                                 {
 927                                                         if ((user->HasPermission((char*)commandname)) || (is_uline(user->server)))
 928                                                         {
 929                                                                 cmdlist[i].handler_function(parameters,pcnt,user);
 930                                                         }
 931                                                 }
 932                                                 else
 933                                                 {
 934                                                         cmdlist[i].handler_function(parameters,pcnt,user);
 935                                                 }
 936                                         }
 937                                 }
 938                         }
 939                 }
 940         }
 941 }
 942
 943
 944 void force_nickchange(userrec* user,const char* newnick)
 945 {
 946         char nick[MAXBUF];
 947         int MOD_RESULT = 0;
 948
 949         strcpy(nick,"");
 950
 951         FOREACH_RESULT(OnUserPreNick(user,newnick));
 952         if (MOD_RESULT) {
 953                 stats->statsCollisions++;
 954                 kill_link(user,"Nickname collision");
 955                 return;
 956         }
 957         if (matches_qline(newnick))
 958         {
 959                 stats->statsCollisions++;
 960                 kill_link(user,"Nickname collision");
 961                 return;
 962         }
 963
 964         if (user)
 965         {
 966                 if (newnick)
 967                 {
 968                         strncpy(nick,newnick,MAXBUF);
 969                 }
 970                 if (user->registered == 7)
 971                 {
 972                         char* pars[1];
 973                         pars[0] = nick;
 974                         handle_nick(pars,1,user);
 975                 }
 976         }
 977 }
 978
 979
 980 int process_parameters(char **command_p,char *parameters)
 981 {
 982         int j = 0;
 983         int q = strlen(parameters);
 984         if (!q)
 985         {
 986                 /* no parameters, command_p invalid! */
 987                 return 0;
 988         }
 989         if (parameters[0] == ':')
 990         {
 991                 command_p[0] = parameters+1;
 992                 return 1;
 993         }
 994         if (q)
 995         {
 996                 if ((strchr(parameters,' ')==NULL) || (parameters[0] == ':'))
 997                 {
 998                         /* only one parameter */
 999                         command_p[0] = parameters;
1000                         if (parameters[0] == ':')
1001                         {
1002                                 if (strchr(parameters,' ') != NULL)
1003                                 {
1004                                         command_p[0]++;
1005                                 }
1006                         }
1007                         return 1;
1008                 }
1009         }
1010         command_p[j++] = parameters;
1011         for (int i = 0; i <= q; i++)
1012         {
1013                 if (parameters[i] == ' ')
1014                 {
1015                         command_p[j++] = parameters+i+1;
1016                         parameters[i] = '\0';
1017                         if (command_p[j-1][0] == ':')
1018                         {
1019                                 *command_p[j-1]++; /* remove dodgy ":" */
1020                                 break;
1021                                 /* parameter like this marks end of the sequence */
1022                         }
1023                 }
1024         }
1025         return j; /* returns total number of items in the list */
1026 }
1027
1028 void process_command(userrec *user, char* cmd)
1029 {
1030         char *parameters;
1031         char *command;
1032         char *command_p[127];
1033         char p[MAXBUF], temp[MAXBUF];
1034         int j, items, cmd_found;
1035
1036         for (int i = 0; i < 127; i++)
1037                 command_p[i] = NULL;
1038
1039         if (!user)
1040         {
1041                 return;
1042         }
1043         if (!cmd)
1044         {
1045                 return;
1046         }
1047         if (!cmd[0])
1048         {
1049                 return;
1050         }
1051
1052         int total_params = 0;
1053         if (strlen(cmd)>2)
1054         {
1055                 for (unsigned int q = 0; q < strlen(cmd)-1; q++)
1056                 {
1057                         if ((cmd[q] == ' ') && (cmd[q+1] == ':'))
1058                         {
1059                                 total_params++;
1060                                 // found a 'trailing', we dont count them after this.
1061                                 break;
1062                         }
1063                         if (cmd[q] == ' ')
1064                                 total_params++;
1065                 }
1066         }
1067
1068         // another phidjit bug...
1069         if (total_params > 126)
1070         {
1071                 *(strchr(cmd,' ')) = '\0';
1072                 WriteServ(user->fd,"421 %s %s :Too many parameters given",user->nick,cmd);
1073                 return;
1074         }
1075
1076         strlcpy(temp,cmd,MAXBUF);
1077
1078         std::string tmp = cmd;
1079         for (int i = 0; i <= MODCOUNT; i++)
1080         {
1081                 std::string oldtmp = tmp;
1082                 modules[i]->OnServerRaw(tmp,true,user);
1083                 if (oldtmp != tmp)
1084                 {
1085                         log(DEBUG,"A Module changed the input string!");
1086                         log(DEBUG,"New string: %s",tmp.c_str());
1087                         log(DEBUG,"Old string: %s",oldtmp.c_str());
1088                         break;
1089                 }
1090         }
1091         strlcpy(cmd,tmp.c_str(),MAXBUF);
1092         strlcpy(temp,cmd,MAXBUF);
1093
1094         if (!strchr(cmd,' '))
1095         {
1096                 /* no parameters, lets skip the formalities and not chop up
1097                  * the string */
1098                 log(DEBUG,"About to preprocess command with no params");
1099                 items = 0;
1100                 command_p[0] = NULL;
1101                 parameters = NULL;
1102                 for (unsigned int i = 0; i <= strlen(cmd); i++)
1103                 {
1104                         cmd[i] = toupper(cmd[i]);
1105                 }
1106                 command = cmd;
1107         }
1108         else
1109         {
1110                 strcpy(cmd,"");
1111                 j = 0;
1112                 /* strip out extraneous linefeeds through mirc's crappy pasting (thanks Craig) */
1113                 for (unsigned int i = 0; i < strlen(temp); i++)
1114                 {
1115                         if ((temp[i] != 10) && (temp[i] != 13) && (temp[i] != 0) && (temp[i] != 7))
1116                         {
1117                                 cmd[j++] = temp[i];
1118                                 cmd[j] = 0;
1119                         }
1120                 }
1121                 /* split the full string into a command plus parameters */
1122                 parameters = p;
1123                 strcpy(p," ");
1124                 command = cmd;
1125                 if (strchr(cmd,' '))
1126                 {
1127                         for (unsigned int i = 0; i <= strlen(cmd); i++)
1128                         {
1129                                 /* capitalise the command ONLY, leave params intact */
1130                                 cmd[i] = toupper(cmd[i]);
1131                                 /* are we nearly there yet?! :P */
1132                                 if (cmd[i] == ' ')
1133                                 {
1134                                         command = cmd;
1135                                         parameters = cmd+i+1;
1136                                         cmd[i] = '\0';
1137                                         break;
1138                                 }
1139                         }
1140                 }
1141                 else
1142                 {
1143                         for (unsigned int i = 0; i <= strlen(cmd); i++)
1144                         {
1145                                 cmd[i] = toupper(cmd[i]);
1146                         }
1147                 }
1148
1149         }
1150         cmd_found = 0;
1151
1152         if (strlen(command)>MAXCOMMAND)
1153         {
1154                 WriteServ(user->fd,"421 %s %s :Command too long",user->nick,command);
1155                 return;
1156         }
1157
1158         for (unsigned int x = 0; x < strlen(command); x++)
1159         {
1160                 if (((command[x] < 'A') || (command[x] > 'Z')) && (command[x] != '.'))
1161                 {
1162                         if (((command[x] < '0') || (command[x]> '9')) && (command[x] != '-'))
1163                         {
1164                                 if (strchr("@!\"$%^&*(){}[]_=+;:'#~,<>/?\\|`",command[x]))
1165                                 {
1166                                         stats->statsUnknown++;
1167                                         WriteServ(user->fd,"421 %s %s :Unknown command",user->nick,command);
1168                                         return;
1169                                 }
1170                         }
1171                 }
1172         }
1173
1174         for (unsigned int i = 0; i != cmdlist.size(); i++)
1175         {
1176                 if (cmdlist[i].command[0])
1177                 {
1178                         if (strlen(command)>=(strlen(cmdlist[i].command))) if (!strncmp(command, cmdlist[i].command,MAXCOMMAND))
1179                         {
1180                                 if (parameters)
1181                                 {
1182                                         if (parameters[0])
1183                                         {
1184                                                 items = process_parameters(command_p,parameters);
1185                                         }
1186                                         else
1187                                         {
1188                                                 items = 0;
1189                                                 command_p[0] = NULL;
1190                                         }
1191                                 }
1192                                 else
1193                                 {
1194                                         items = 0;
1195                                         command_p[0] = NULL;
1196                                 }
1197
1198                                 if (user)
1199                                 {
1200                                         /* activity resets the ping pending timer */
1201                                         user->nping = TIME + user->pingmax;
1202                                         if ((items) < cmdlist[i].min_params)
1203                                         {
1204                                                 log(DEBUG,"process_command: not enough parameters: %s %s",user->nick,command);
1205                                                 WriteServ(user->fd,"461 %s %s :Not enough parameters",user->nick,command);
1206                                                 return;
1207                                         }
1208                                         if ((!strchr(user->modes,cmdlist[i].flags_needed)) && (cmdlist[i].flags_needed))
1209                                         {
1210                                                 log(DEBUG,"process_command: permission denied: %s %s",user->nick,command);
1211                                                 WriteServ(user->fd,"481 %s :Permission Denied- You do not have the required operator privilages",user->nick);
1212                                                 cmd_found = 1;
1213                                                 return;
1214                                         }
1215                                         if ((cmdlist[i].flags_needed) && (!user->HasPermission(command)))
1216                                         {
1217                                                 log(DEBUG,"process_command: permission denied: %s %s",user->nick,command);
1218                                                 WriteServ(user->fd,"481 %s :Permission Denied- Oper type %s does not have access to command %s",user->nick,user->oper,command);
1219                                                 cmd_found = 1;
1220                                                 return;
1221                                         }
1222                                         /* if the command isnt USER, PASS, or NICK, and nick is empty,
1223                                          * deny command! */
1224                                         if ((strncmp(command,"USER",4)) && (strncmp(command,"NICK",4)) && (strncmp(command,"PASS",4)))
1225                                         {
1226                                                 if ((!isnick(user->nick)) || (user->registered != 7))
1227                                                 {
1228                                                         log(DEBUG,"process_command: not registered: %s %s",user->nick,command);
1229                                                         WriteServ(user->fd,"451 %s :You have not registered",command);
1230                                                         return;
1231                                                 }
1232                                         }
1233                                         if ((user->registered == 7) && (!strchr(user->modes,'o')))
1234                                         {
1235                                                 std::stringstream dcmds(Config->DisabledCommands);
1236                                                 while (!dcmds.eof())
1237                                                 {
1238                                                         std::string thiscmd;
1239                                                         dcmds >> thiscmd;
1240                                                         if (!strcasecmp(thiscmd.c_str(),command))
1241                                                         {
1242                                                                 // command is disabled!
1243                                                                 WriteServ(user->fd,"421 %s %s :This command has been disabled.",user->nick,command);
1244                                                                 return;
1245                                                         }
1246                                                 }
1247                                         }
1248                                         if ((user->registered == 7) || (!strncmp(command,"USER",4)) || (!strncmp(command,"NICK",4)) || (!strncmp(command,"PASS",4)))
1249                                         {
1250                                                 if (cmdlist[i].handler_function)
1251                                                 {
1252
1253                                                         /* ikky /stats counters */
1254                                                         if (temp)
1255                                                         {
1256                                                                 cmdlist[i].use_count++;
1257                                                                 cmdlist[i].total_bytes+=strlen(temp);
1258                                                         }
1259
1260                                                         int MOD_RESULT = 0;
1261                                                         FOREACH_RESULT(OnPreCommand(command,command_p,items,user));
1262                                                         if (MOD_RESULT == 1) {
1263                                                                 return;
1264                                                         }
1265
1266                                                         /* WARNING: nothing may come after the
1267                                                          * command handler call, as the handler
1268                                                          * may free the user structure! */
1269
1270                                                         cmdlist[i].handler_function(command_p,items,user);
1271                                                 }
1272                                                 return;
1273                                         }
1274                                         else
1275                                         {
1276                                                 WriteServ(user->fd,"451 %s :You have not registered",command);
1277                                                 return;
1278                                         }
1279                                 }
1280                                 cmd_found = 1;
1281                         }
1282                 }
1283         }
1284         if ((!cmd_found) && (user))
1285         {
1286                 stats->statsUnknown++;
1287                 WriteServ(user->fd,"421 %s %s :Unknown command",user->nick,command);
1288         }
1289 }
1290
1291 bool removecommands(const char* source)
1292 {
1293         bool go_again = true;
1294         while (go_again)
1295         {
1296                 go_again = false;
1297                 for (std::deque<command_t>::iterator i = cmdlist.begin(); i != cmdlist.end(); i++)
1298                 {
1299                         if (!strcmp(i->source,source))
1300                         {
1301                                 log(DEBUG,"removecommands(%s) Removing dependent command: %s",i->source,i->command);
1302                                 cmdlist.erase(i);
1303                                 go_again = true;
1304                                 break;
1305                         }
1306                 }
1307         }
1308         return true;
1309 }
1310
1311
1312 void process_buffer(const char* cmdbuf,userrec *user)
1313 {
1314         if (!user)
1315         {
1316                 log(DEFAULT,"*** BUG *** process_buffer was given an invalid parameter");
1317                 return;
1318         }
1319         char cmd[MAXBUF];
1320         if (!cmdbuf)
1321         {
1322                 log(DEFAULT,"*** BUG *** process_buffer was given an invalid parameter");
1323                 return;
1324         }
1325         if (!cmdbuf[0])
1326         {
1327                 return;
1328         }
1329         while (*cmdbuf == ' ') cmdbuf++; // strip leading spaces
1330
1331         strlcpy(cmd,cmdbuf,MAXBUF);
1332         if (!cmd[0])
1333         {
1334                 return;
1335         }
1336         int sl = strlen(cmd)-1;
1337         if ((cmd[sl] == 13) || (cmd[sl] == 10))
1338         {
1339                 cmd[sl] = '\0';
1340         }
1341         sl = strlen(cmd)-1;
1342         if ((cmd[sl] == 13) || (cmd[sl] == 10))
1343         {
1344                 cmd[sl] = '\0';
1345         }
1346         sl = strlen(cmd)-1;
1347         while (cmd[sl] == ' ') // strip trailing spaces
1348         {
1349                 cmd[sl] = '\0';
1350                 sl = strlen(cmd)-1;
1351         }
1352
1353         if (!cmd[0])
1354         {
1355                 return;
1356         }
1357         log(DEBUG,"CMDIN: %s %s",user->nick,cmd);
1358         tidystring(cmd);
1359         if ((user) && (cmd))
1360         {
1361                 process_command(user,cmd);
1362         }
1363 }
1364
1365 char MODERR[MAXBUF];
1366
1367 char* ModuleError()
1368 {
1369         return MODERR;
1370 }
1371
1372 void erase_factory(int j)
1373 {
1374         int v = 0;
1375         for (std::vector<ircd_module*>::iterator t = factory.begin(); t != factory.end(); t++)
1376         {
1377                 if (v == j)
1378                 {
1379                         factory.erase(t);
1380                         factory.push_back(NULL);
1381                         return;
1382                 }
1383                 v++;
1384         }
1385 }
1386
1387 void erase_module(int j)
1388 {
1389         int v1 = 0;
1390         for (std::vector<Module*>::iterator m = modules.begin(); m!= modules.end(); m++)
1391         {
1392                 if (v1 == j)
1393                 {
1394                         delete *m;
1395                         modules.erase(m);
1396                         modules.push_back(NULL);
1397                         break;
1398                 }
1399                 v1++;
1400         }
1401         int v2 = 0;
1402         for (std::vector<std::string>::iterator v = Config->module_names.begin(); v != Config->module_names.end(); v++)
1403         {
1404                 if (v2 == j)
1405                 {
1406                        Config->module_names.erase(v);
1407                        break;
1408                 }
1409                 v2++;
1410         }
1411
1412 }
1413
1414 bool UnloadModule(const char* filename)
1415 {
1416         std::string filename_str = filename;
1417         for (unsigned int j = 0; j != Config->module_names.size(); j++)
1418         {
1419                 if (Config->module_names[j] == filename_str)
1420                 {
1421                         if (modules[j]->GetVersion().Flags & VF_STATIC)
1422                         {
1423                                 log(DEFAULT,"Failed to unload STATIC module %s",filename);
1424                                 snprintf(MODERR,MAXBUF,"Module not unloadable (marked static)");
1425                                 return false;
1426                         }
1427                         /* Give the module a chance to tidy out all its metadata */
1428                         for (chan_hash::iterator c = chanlist.begin(); c != chanlist.end(); c++)
1429                         {
1430                                 modules[j]->OnCleanup(TYPE_CHANNEL,c->second);
1431                         }
1432                         for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++)
1433                         {
1434                                 modules[j]->OnCleanup(TYPE_USER,u->second);
1435                         }
1436                         FOREACH_MOD OnUnloadModule(modules[j],Config->module_names[j]);
1437                         // found the module
1438                         log(DEBUG,"Deleting module...");
1439                         erase_module(j);
1440                         log(DEBUG,"Erasing module entry...");
1441                         erase_factory(j);
1442                         log(DEBUG,"Removing dependent commands...");
1443                         removecommands(filename);
1444                         log(DEFAULT,"Module %s unloaded",filename);
1445                         MODCOUNT--;
1446                         return true;
1447                 }
1448         }
1449         log(DEFAULT,"Module %s is not loaded, cannot unload it!",filename);
1450         snprintf(MODERR,MAXBUF,"Module not loaded");
1451         return false;
1452 }
1453
1454 bool LoadModule(const char* filename)
1455 {
1456         char modfile[MAXBUF];
1457 #ifdef STATIC_LINK
1458         snprintf(modfile,MAXBUF,"%s",filename);
1459 #else
1460         snprintf(modfile,MAXBUF,"%s/%s",Config->ModPath,filename);
1461 #endif
1462         std::string filename_str = filename;
1463 #ifndef STATIC_LINK
1464         if (!DirValid(modfile))
1465         {
1466                 log(DEFAULT,"Module %s is not within the modules directory.",modfile);
1467                 snprintf(MODERR,MAXBUF,"Module %s is not within the modules directory.",modfile);
1468                 return false;
1469         }
1470 #endif
1471         log(DEBUG,"Loading module: %s",modfile);
1472 #ifndef STATIC_LINK
1473         if (FileExists(modfile))
1474         {
1475 #endif
1476                 for (unsigned int j = 0; j < Config->module_names.size(); j++)
1477                 {
1478                         if (Config->module_names[j] == filename_str)
1479                         {
1480                                 log(DEFAULT,"Module %s is already loaded, cannot load a module twice!",modfile);
1481                                 snprintf(MODERR,MAXBUF,"Module already loaded");
1482                                 return false;
1483                         }
1484                 }
1485                 ircd_module* a = new ircd_module(modfile);
1486                 factory[MODCOUNT+1] = a;
1487                 if (factory[MODCOUNT+1]->LastError())
1488                 {
1489                         log(DEFAULT,"Unable to load %s: %s",modfile,factory[MODCOUNT+1]->LastError());
1490                         snprintf(MODERR,MAXBUF,"Loader/Linker error: %s",factory[MODCOUNT+1]->LastError());
1491                         MODCOUNT--;
1492                         return false;
1493                 }
1494                 if (factory[MODCOUNT+1]->factory)
1495                 {
1496                         Module* m = factory[MODCOUNT+1]->factory->CreateModule(MyServer);
1497                         modules[MODCOUNT+1] = m;
1498                         /* save the module and the module's classfactory, if
1499                          * this isnt done, random crashes can occur :/ */
1500                         Config->module_names.push_back(filename);
1501                 }
1502                 else
1503                 {
1504                         log(DEFAULT,"Unable to load %s",modfile);
1505                         snprintf(MODERR,MAXBUF,"Factory function failed!");
1506                         return false;
1507                 }
1508 #ifndef STATIC_LINK
1509         }
1510         else
1511         {
1512                 log(DEFAULT,"InspIRCd: startup: Module Not Found %s",modfile);
1513                 snprintf(MODERR,MAXBUF,"Module file could not be found");
1514                 return false;
1515         }
1516 #endif
1517         MODCOUNT++;
1518         FOREACH_MOD OnLoadModule(modules[MODCOUNT],filename_str);
1519         return true;
1520 }
1521
1522 int InspIRCd::Run()
1523 {
1524         bool expire_run = false;
1525         std::vector<int> activefds;
1526         int incomingSockfd;
1527         int in_port;
1528         userrec* cu = NULL;
1529         InspSocket* s = NULL;
1530         InspSocket* s_del = NULL;
1531         char* target;
1532         unsigned int numberactive;
1533         sockaddr_in sock_us;     // our port number
1534         socklen_t uslen;         // length of our port number
1535
1536         if (!Config->nofork)
1537         {
1538                 freopen("/dev/null","w",stdout);
1539                 freopen("/dev/null","w",stderr);
1540         }
1541
1542         /* Add the listening sockets used for client inbound connections
1543          * to the socket engine
1544          */
1545         for (int count = 0; count < portCount; count++)
1546                 SE->AddFd(openSockfd[count],true,X_LISTEN);
1547
1548         WritePID(Config->PID);
1549
1550         /* main loop, this never returns */
1551         for (;;)
1552         {
1553                 /* time() seems to be a pretty expensive syscall, so avoid calling it too much.
1554                  * Once per loop iteration is pleanty.
1555                  */
1556                 OLDTIME = TIME;
1557                 TIME = time(NULL);
1558
1559                 /* Run background module timers every few seconds
1560                  * (the docs say modules shouldnt rely on accurate
1561                  * timing using this event, so we dont have to
1562                  * time this exactly).
1563                  */
1564                 if (((TIME % 8) == 0) && (!expire_run))
1565                 {
1566                         expire_lines();
1567                         FOREACH_MOD OnBackgroundTimer(TIME);
1568                         expire_run = true;
1569                         continue;
1570                 }
1571                 if ((TIME % 8) == 1)
1572                         expire_run = false;
1573
1574                 /* Once a second, do the background processing */
1575                 if (TIME != OLDTIME)
1576                         while (DoBackgroundUserStuff(TIME));
1577
1578                 /* Call the socket engine to wait on the active
1579                  * file descriptors. The socket engine has everything's
1580                  * descriptors in its list... dns, modules, users,
1581                  * servers... so its nice and easy, just one call.
1582                  */
1583                 SE->Wait(activefds);
1584
1585                 /**
1586                  * Now process each of the fd's. For users, we have a fast
1587                  * lookup table which can find a user by file descriptor, so
1588                  * processing them by fd isnt expensive. If we have a lot of
1589                  * listening ports or module sockets though, things could get
1590                  * ugly.
1591                  */
1592                 numberactive = activefds.size();
1593                 for (unsigned int activefd = 0; activefd < numberactive; activefd++)
1594                 {
1595                         int socket_type = SE->GetType(activefds[activefd]);
1596                         switch (socket_type)
1597                         {
1598                                 case X_ESTAB_CLIENT:
1599
1600                                         cu = fd_ref_table[activefds[activefd]];
1601                                         if (cu)
1602                                                 ProcessUser(cu);
1603
1604                                 break;
1605
1606                                 case X_ESTAB_MODULE:
1607
1608                                         /* Process module-owned sockets.
1609                                          * Modules are encouraged to inherit their sockets from
1610                                          * InspSocket so we can process them neatly like this.
1611                                          */
1612                                         s = socket_ref[activefds[activefd]];
1613
1614                                         if ((s) && (!s->Poll()))
1615                                         {
1616                                                 log(DEBUG,"Socket poll returned false, close and bail");
1617                                                 SE->DelFd(s->GetFd());
1618                                                 for (std::vector<InspSocket*>::iterator a = module_sockets.begin(); a < module_sockets.end(); a++)
1619                                                 {
1620                                                         s_del = (InspSocket*)*a;
1621                                                         if ((s_del) && (s_del->GetFd() == activefds[activefd]))
1622                                                         {
1623                                                                 module_sockets.erase(a);
1624                                                                 break;
1625                                                         }
1626                                                 }
1627                                                 s->Close();
1628                                                 delete s;
1629                                         }
1630
1631                                 break;
1632
1633                                 case X_ESTAB_DNS:
1634
1635                                         /* When we are using single-threaded dns,
1636                                          * the sockets for dns end up in our mainloop.
1637                                          * When we are using multi-threaded dns,
1638                                          * each thread has its own basic poll() loop
1639                                          * within it, making them 'fire and forget'
1640                                          * and independent of the mainloop.
1641                                          */
1642 #ifndef THREADED_DNS
1643                                         dns_poll(activefds[activefd]);
1644 #endif
1645                                 break;
1646
1647                                 case X_LISTEN:
1648
1649                                         /* It's a listener */
1650                                         uslen = sizeof(sock_us);
1651                                         length = sizeof(client);
1652                                         incomingSockfd = accept (activefds[activefd],(struct sockaddr*)&client,&length);
1653                                         if (!getsockname(incomingSockfd,(sockaddr*)&sock_us,&uslen))
1654                                         {
1655                                                 in_port = ntohs(sock_us.sin_port);
1656                                                 log(DEBUG,"Accepted socket %d",incomingSockfd);
1657                                                 target = (char*)inet_ntoa(client.sin_addr);
1658                                                 /* Years and years ago, we used to resolve here
1659                                                  * using gethostbyaddr(). That is sucky and we
1660                                                  * don't do that any more...
1661                                                  */
1662                                                 if (incomingSockfd >= 0)
1663                                                 {
1664                                                         FOREACH_MOD OnRawSocketAccept(incomingSockfd, target, in_port);
1665                                                         stats->statsAccept++;
1666                                                         AddClient(incomingSockfd, target, in_port, false, target);
1667                                                         log(DEBUG,"Adding client on port %lu fd=%lu",(unsigned long)in_port,(unsigned long)incomingSockfd);
1668                                                 }
1669                                                 else
1670                                                 {
1671                                                         WriteOpers("*** WARNING: accept() failed on port %lu (%s)",(unsigned long)in_port,target);
1672                                                         log(DEBUG,"accept failed: %lu",(unsigned long)in_port);
1673                                                         stats->statsRefused++;
1674                                                 }
1675                                         }
1676                                         else
1677                                         {
1678                                                 log(DEBUG,"Couldnt look up the port number for fd %lu (OS BROKEN?!)",incomingSockfd);
1679                                                 shutdown(incomingSockfd,2);
1680                                                 close(incomingSockfd);
1681                                         }
1682                                 break;
1683
1684                                 default:
1685                                         /* Something went wrong if we're in here.
1686                                          * In fact, so wrong, im not quite sure
1687                                          * what we would do, so for now, its going
1688                                          * to safely do bugger all.
1689                                          */
1690                                 break;
1691                         }
1692                 }
1693
1694         }
1695         /* This is never reached -- we hope! */
1696         return 0;
1697 }
1698
1699 /**********************************************************************************/
1700
1701 /**
1702  * An ircd in four lines! bwahahaha. ahahahahaha. ahahah *cough*.
1703  */
1704
1705 int main(int argc, char** argv)
1706 {
1707         InspIRCd TittyBiscuits = new InspIRCd(argc, argv);
1708         TittyBiscuits->Run();
1709         delete TittyBiscuits;
1710         return 0;
1711 }
1712