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