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         return;
 472 }
 473
 474 template<typename T> inline string ConvToStr(const T &in)
 475 {
 476         stringstream tmp;
 477         if (!(tmp << in)) return string();
 478         return tmp.str();
 479 }
 480
 481 /* re-allocates a nick in the user_hash after they change nicknames,
 482  * returns a pointer to the new user as it may have moved */
 483
 484 userrec* ReHashNick(char* Old, char* New)
 485 {
 486         //user_hash::iterator newnick;
 487         user_hash::iterator oldnick = clientlist.find(Old);
 488
 489         log(DEBUG,"ReHashNick: %s %s",Old,New);
 490
 491         if (!strcasecmp(Old,New))
 492         {
 493                 log(DEBUG,"old nick is new nick, skipping");
 494                 return oldnick->second;
 495         }
 496
 497         if (oldnick == clientlist.end()) return NULL; /* doesnt exist */
 498
 499         log(DEBUG,"ReHashNick: Found hashed nick %s",Old);
 500
 501         userrec* olduser = oldnick->second;
 502         clientlist[New] = olduser;
 503         clientlist.erase(oldnick);
 504
 505         log(DEBUG,"ReHashNick: Nick rehashed as %s",New);
 506
 507         return clientlist[New];
 508 }
 509
 510 /* adds or updates an entry in the whowas list */
 511 void AddWhoWas(userrec* u)
 512 {
 513         whowas_hash::iterator iter = whowas.find(u->nick);
 514         WhoWasUser *a = new WhoWasUser();
 515         strlcpy(a->nick,u->nick,NICKMAX);
 516         strlcpy(a->ident,u->ident,IDENTMAX);
 517         strlcpy(a->dhost,u->dhost,160);
 518         strlcpy(a->host,u->host,160);
 519         strlcpy(a->fullname,u->fullname,MAXGECOS);
 520         strlcpy(a->server,u->server,256);
 521         a->signon = u->signon;
 522
 523         /* MAX_WHOWAS:   max number of /WHOWAS items
 524          * WHOWAS_STALE: number of hours before a WHOWAS item is marked as stale and
 525          *               can be replaced by a newer one
 526          */
 527
 528         if (iter == whowas.end())
 529         {
 530                 if (whowas.size() >= (unsigned)WHOWAS_MAX)
 531                 {
 532                         for (whowas_hash::iterator i = whowas.begin(); i != whowas.end(); i++)
 533                         {
 534                                 // 3600 seconds in an hour ;)
 535                                 if ((i->second->signon)<(TIME-(WHOWAS_STALE*3600)))
 536                                 {
 537                                         // delete the old one
 538                                         if (i->second) delete i->second;
 539                                         // replace with new one
 540                                         i->second = a;
 541                                         log(DEBUG,"added WHOWAS entry, purged an old record");
 542                                         return;
 543                                 }
 544                         }
 545                         // no space left and user doesnt exist. Don't leave ram in use!
 546                         log(DEBUG,"Not able to update whowas (list at WHOWAS_MAX entries and trying to add new?), freeing excess ram");
 547                         delete a;
 548                 }
 549                 else
 550                 {
 551                         log(DEBUG,"added fresh WHOWAS entry");
 552                         whowas[a->nick] = a;
 553                 }
 554         }
 555         else
 556         {
 557                 log(DEBUG,"updated WHOWAS entry");
 558                 if (iter->second) delete iter->second;
 559                 iter->second = a;
 560         }
 561 }
 562
 563 #ifdef THREADED_DNS
 564 void* dns_task(void* arg)
 565 {
 566         userrec* u = (userrec*)arg;
 567         log(DEBUG,"DNS thread for user %s",u->nick);
 568         DNS dns1;
 569         DNS dns2;
 570         std::string host;
 571         std::string ip;
 572         if (dns1.ReverseLookup(u->ip))
 573         {
 574                 log(DEBUG,"DNS Step 1");
 575                 while (!dns1.HasResult())
 576                 {
 577                         usleep(100);
 578                 }
 579                 host = dns1.GetResult();
 580                 if (host != "")
 581                 {
 582                         log(DEBUG,"DNS Step 2: '%s'",host.c_str());
 583                         if (dns2.ForwardLookup(host))
 584                         {
 585                                 while (!dns2.HasResult())
 586                                 {
 587                                         usleep(100);
 588                                 }
 589                                 ip = dns2.GetResultIP();
 590                                 log(DEBUG,"DNS Step 3 '%s'(%d) '%s'(%d)",ip.c_str(),ip.length(),u->ip,strlen(u->ip));
 591                                 if (ip == std::string(u->ip))
 592                                 {
 593                                         log(DEBUG,"DNS Step 4");
 594                                         if (host.length() < 160)
 595                                         {
 596                                                 log(DEBUG,"DNS Step 5");
 597                                                 strcpy(u->host,host.c_str());
 598                                                 strcpy(u->dhost,host.c_str());
 599                                         }
 600                                 }
 601                         }
 602                 }
 603         }
 604         u->dns_done = true;
 605         return NULL;
 606 }
 607 #endif
 608
 609 /* add a client connection to the sockets list */
 610 void AddClient(int socket, char* host, int port, bool iscached, char* ip)
 611 {
 612         string tempnick;
 613         char tn2[MAXBUF];
 614         user_hash::iterator iter;
 615
 616         tempnick = ConvToStr(socket) + "-unknown";
 617         sprintf(tn2,"%lu-unknown",(unsigned long)socket);
 618
 619         iter = clientlist.find(tempnick);
 620
 621         // fix by brain.
 622         // as these nicknames are 'RFC impossible', we can be sure nobody is going to be
 623         // using one as a registered connection. As theyre per fd, we can also safely assume
 624         // that we wont have collisions. Therefore, if the nick exists in the list, its only
 625         // used by a dead socket, erase the iterator so that the new client may reclaim it.
 626         // this was probably the cause of 'server ignores me when i hammer it with reconnects'
 627         // issue in earlier alphas/betas
 628         if (iter != clientlist.end())
 629         {
 630                 userrec* goner = iter->second;
 631                 delete goner;
 632                 clientlist.erase(iter);
 633         }
 634
 635         /*
 636          * It is OK to access the value here this way since we know
 637          * it exists, we just created it above.
 638          *
 639          * At NO other time should you access a value in a map or a
 640          * hash_map this way.
 641          */
 642         clientlist[tempnick] = new userrec();
 643
 644         NonBlocking(socket);
 645         log(DEBUG,"AddClient: %lu %s %d %s",(unsigned long)socket,host,port,ip);
 646
 647         clientlist[tempnick]->fd = socket;
 648         strlcpy(clientlist[tempnick]->nick, tn2,NICKMAX);
 649         strlcpy(clientlist[tempnick]->host, host,160);
 650         strlcpy(clientlist[tempnick]->dhost, host,160);
 651         clientlist[tempnick]->server = (char*)FindServerNamePtr(Config->ServerName);
 652         strlcpy(clientlist[tempnick]->ident, "unknown",IDENTMAX);
 653         clientlist[tempnick]->registered = 0;
 654         clientlist[tempnick]->signon = TIME + Config->dns_timeout;
 655         clientlist[tempnick]->lastping = 1;
 656         clientlist[tempnick]->port = port;
 657         strlcpy(clientlist[tempnick]->ip,ip,16);
 658
 659         // set the registration timeout for this user
 660         unsigned long class_regtimeout = 90;
 661         int class_flood = 0;
 662         long class_threshold = 5;
 663         long class_sqmax = 262144;      // 256kb
 664         long class_rqmax = 4096;        // 4k
 665
 666         for (ClassVector::iterator i = Config->Classes.begin(); i != Config->Classes.end(); i++)
 667         {
 668                 if (match(clientlist[tempnick]->host,i->host) && (i->type == CC_ALLOW))
 669                 {
 670                         class_regtimeout = (unsigned long)i->registration_timeout;
 671                         class_flood = i->flood;
 672                         clientlist[tempnick]->pingmax = i->pingtime;
 673                         class_threshold = i->threshold;
 674                         class_sqmax = i->sendqmax;
 675                         class_rqmax = i->recvqmax;
 676                         break;
 677                 }
 678         }
 679
 680         clientlist[tempnick]->nping = TIME+clientlist[tempnick]->pingmax + Config->dns_timeout;
 681         clientlist[tempnick]->timeout = TIME+class_regtimeout;
 682         clientlist[tempnick]->flood = class_flood;
 683         clientlist[tempnick]->threshold = class_threshold;
 684         clientlist[tempnick]->sendqmax = class_sqmax;
 685         clientlist[tempnick]->recvqmax = class_rqmax;
 686
 687         ucrec a;
 688         a.channel = NULL;
 689         a.uc_modes = 0;
 690         for (int i = 0; i < MAXCHANS; i++)
 691                 clientlist[tempnick]->chans.push_back(a);
 692
 693         if (clientlist.size() > Config->SoftLimit)
 694         {
 695                 kill_link(clientlist[tempnick],"No more connections allowed");
 696                 return;
 697         }
 698
 699         if (clientlist.size() >= MAXCLIENTS)
 700         {
 701                 kill_link(clientlist[tempnick],"No more connections allowed");
 702                 return;
 703         }
 704
 705         // this is done as a safety check to keep the file descriptors within range of fd_ref_table.
 706         // its a pretty big but for the moment valid assumption:
 707         // file descriptors are handed out starting at 0, and are recycled as theyre freed.
 708         // therefore if there is ever an fd over 65535, 65536 clients must be connected to the
 709         // irc server at once (or the irc server otherwise initiating this many connections, files etc)
 710         // which for the time being is a physical impossibility (even the largest networks dont have more
 711         // than about 10,000 users on ONE server!)
 712         if ((unsigned)socket > 65534)
 713         {
 714                 kill_link(clientlist[tempnick],"Server is full");
 715                 return;
 716         }
 717
 718
 719         char* e = matches_exception(ip);
 720         if (!e)
 721         {
 722                 char* r = matches_zline(ip);
 723                 if (r)
 724                 {
 725                         char reason[MAXBUF];
 726                         snprintf(reason,MAXBUF,"Z-Lined: %s",r);
 727                         kill_link(clientlist[tempnick],reason);
 728                         return;
 729                 }
 730         }
 731         fd_ref_table[socket] = clientlist[tempnick];
 732         SE->AddFd(socket,true,X_ESTAB_CLIENT);
 733 }
 734
 735 /* shows the message of the day, and any other on-logon stuff */
 736 void FullConnectUser(userrec* user)
 737 {
 738         stats->statsConnects++;
 739         user->idle_lastmsg = TIME;
 740         log(DEBUG,"ConnectUser: %s",user->nick);
 741
 742         if ((strcmp(Passwd(user),"")) && (!user->haspassed))
 743         {
 744                 kill_link(user,"Invalid password");
 745                 return;
 746         }
 747         if (IsDenied(user))
 748         {
 749                 kill_link(user,"Unauthorised connection");
 750                 return;
 751         }
 752
 753         char match_against[MAXBUF];
 754         snprintf(match_against,MAXBUF,"%s@%s",user->ident,user->host);
 755         char* e = matches_exception(match_against);
 756         if (!e)
 757         {
 758                 char* r = matches_gline(match_against);
 759                 if (r)
 760                 {
 761                         char reason[MAXBUF];
 762                         snprintf(reason,MAXBUF,"G-Lined: %s",r);
 763                         kill_link_silent(user,reason);
 764                         return;
 765                 }
 766                 r = matches_kline(user->host);
 767                 if (r)
 768                 {
 769                         char reason[MAXBUF];
 770                         snprintf(reason,MAXBUF,"K-Lined: %s",r);
 771                         kill_link_silent(user,reason);
 772                         return;
 773                 }
 774         }
 775
 776
 777         WriteServ(user->fd,"NOTICE Auth :Welcome to \002%s\002!",Config->Network);
 778         WriteServ(user->fd,"001 %s :Welcome to the %s IRC Network %s!%s@%s",user->nick,Config->Network,user->nick,user->ident,user->host);
 779         WriteServ(user->fd,"002 %s :Your host is %s, running version %s",user->nick,Config->ServerName,VERSION);
 780         WriteServ(user->fd,"003 %s :This server was created %s %s",user->nick,__TIME__,__DATE__);
 781         WriteServ(user->fd,"004 %s %s %s iowghraAsORVSxNCWqBzvdHtGI lvhopsmntikrRcaqOALQbSeKVfHGCuzN",user->nick,Config->ServerName,VERSION);
 782         // the neatest way to construct the initial 005 numeric, considering the number of configure constants to go in it...
 783         std::stringstream v;
 784         v << "WALLCHOPS MODES=13 CHANTYPES=# PREFIX=(ohv)@%+ MAP SAFELIST MAXCHANNELS=" << MAXCHANS;
 785         v << " MAXBANS=60 NICKLEN=" << NICKMAX;
 786         v << " TOPICLEN=" << MAXTOPIC << " KICKLEN=" << MAXKICK << " MAXTARGETS=20 AWAYLEN=" << MAXAWAY << " CHANMODES=ohvb,k,l,psmnti NETWORK=";
 787         v << Config->Network;
 788         std::string data005 = v.str();
 789         FOREACH_MOD On005Numeric(data005);
 790         // anfl @ #ratbox, efnet reminded me that according to the RFC this cant contain more than 13 tokens per line...
 791         // so i'd better split it :)
 792         std::stringstream out(data005);
 793         std::string token = "";
 794         std::string line5 = "";
 795         int token_counter = 0;
 796         while (!out.eof())
 797         {
 798                 out >> token;
 799                 line5 = line5 + token + " ";
 800                 token_counter++;
 801                 if ((token_counter >= 13) || (out.eof() == true))
 802                 {
 803                         WriteServ(user->fd,"005 %s %s:are supported by this server",user->nick,line5.c_str());
 804                         line5 = "";
 805                         token_counter = 0;
 806                 }
 807         }
 808         ShowMOTD(user);
 809
 810         // fix 3 by brain, move registered = 7 below these so that spurious modes and host changes dont go out
 811         // onto the network and produce 'fake direction'
 812         FOREACH_MOD OnUserConnect(user);
 813         FOREACH_MOD OnGlobalConnect(user);
 814         user->registered = 7;
 815         WriteOpers("*** Client connecting on port %lu: %s!%s@%s [%s]",(unsigned long)user->port,user->nick,user->ident,user->host,user->ip);
 816 }
 817
 818
 819 /* shows the message of the day, and any other on-logon stuff */
 820 void ConnectUser(userrec *user)
 821 {
 822         // dns is already done, things are fast. no need to wait for dns to complete just pass them straight on
 823         if ((user->dns_done) && (user->registered >= 3) && (AllModulesReportReady(user)))
 824         {
 825                 FullConnectUser(user);
 826         }
 827 }
 828
 829 std::string GetVersionString()
 830 {
 831         char versiondata[MAXBUF];
 832 #ifdef THREADED_DNS
 833         char dnsengine[] = "multithread";
 834 #else
 835         char dnsengine[] = "singlethread";
 836 #endif
 837         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);
 838         return versiondata;
 839 }
 840
 841 void handle_version(char **parameters, int pcnt, userrec *user)
 842 {
 843         WriteServ(user->fd,"351 %s :%s",user->nick,GetVersionString().c_str());
 844 }
 845
 846
 847 bool is_valid_cmd(const char* commandname, int pcnt, userrec * user)
 848 {
 849         for (unsigned int i = 0; i < cmdlist.size(); i++)
 850         {
 851                 if (!strcasecmp(cmdlist[i].command,commandname))
 852                 {
 853                         if (cmdlist[i].handler_function)
 854                         {
 855                                 if ((pcnt>=cmdlist[i].min_params) && (strcasecmp(cmdlist[i].source,"<core>")))
 856                                 {
 857                                         if ((strchr(user->modes,cmdlist[i].flags_needed)) || (!cmdlist[i].flags_needed))
 858                                         {
 859                                                 if (cmdlist[i].flags_needed)
 860                                                 {
 861                                                         if ((user->HasPermission((char*)commandname)) || (is_uline(user->server)))
 862                                                         {
 863                                                                 return true;
 864                                                         }
 865                                                         else
 866                                                         {
 867                                                                 return false;
 868                                                         }
 869                                                 }
 870                                                 return true;
 871                                         }
 872                                 }
 873                         }
 874                 }
 875         }
 876         return false;
 877 }
 878
 879 // calls a handler function for a command
 880
 881 void call_handler(const char* commandname,char **parameters, int pcnt, userrec *user)
 882 {
 883         for (unsigned int i = 0; i < cmdlist.size(); i++)
 884         {
 885                 if (!strcasecmp(cmdlist[i].command,commandname))
 886                 {
 887                         if (cmdlist[i].handler_function)
 888                         {
 889                                 if (pcnt>=cmdlist[i].min_params)
 890                                 {
 891                                         if ((strchr(user->modes,cmdlist[i].flags_needed)) || (!cmdlist[i].flags_needed))
 892                                         {
 893                                                 if (cmdlist[i].flags_needed)
 894                                                 {
 895                                                         if ((user->HasPermission((char*)commandname)) || (is_uline(user->server)))
 896                                                         {
 897                                                                 cmdlist[i].handler_function(parameters,pcnt,user);
 898                                                         }
 899                                                 }
 900                                                 else
 901                                                 {
 902                                                         cmdlist[i].handler_function(parameters,pcnt,user);
 903                                                 }
 904                                         }
 905                                 }
 906                         }
 907                 }
 908         }
 909 }
 910
 911
 912 void force_nickchange(userrec* user,const char* newnick)
 913 {
 914         char nick[MAXBUF];
 915         int MOD_RESULT = 0;
 916
 917         strcpy(nick,"");
 918
 919         FOREACH_RESULT(OnUserPreNick(user,newnick));
 920         if (MOD_RESULT) {
 921                 stats->statsCollisions++;
 922                 kill_link(user,"Nickname collision");
 923                 return;
 924         }
 925         if (matches_qline(newnick))
 926         {
 927                 stats->statsCollisions++;
 928                 kill_link(user,"Nickname collision");
 929                 return;
 930         }
 931
 932         if (user)
 933         {
 934                 if (newnick)
 935                 {
 936                         strncpy(nick,newnick,MAXBUF);
 937                 }
 938                 if (user->registered == 7)
 939                 {
 940                         char* pars[1];
 941                         pars[0] = nick;
 942                         handle_nick(pars,1,user);
 943                 }
 944         }
 945 }
 946
 947
 948 int process_parameters(char **command_p,char *parameters)
 949 {
 950         int j = 0;
 951         int q = strlen(parameters);
 952         if (!q)
 953         {
 954                 /* no parameters, command_p invalid! */
 955                 return 0;
 956         }
 957         if (parameters[0] == ':')
 958         {
 959                 command_p[0] = parameters+1;
 960                 return 1;
 961         }
 962         if (q)
 963         {
 964                 if ((strchr(parameters,' ')==NULL) || (parameters[0] == ':'))
 965                 {
 966                         /* only one parameter */
 967                         command_p[0] = parameters;
 968                         if (parameters[0] == ':')
 969                         {
 970                                 if (strchr(parameters,' ') != NULL)
 971                                 {
 972                                         command_p[0]++;
 973                                 }
 974                         }
 975                         return 1;
 976                 }
 977         }
 978         command_p[j++] = parameters;
 979         for (int i = 0; i <= q; i++)
 980         {
 981                 if (parameters[i] == ' ')
 982                 {
 983                         command_p[j++] = parameters+i+1;
 984                         parameters[i] = '\0';
 985                         if (command_p[j-1][0] == ':')
 986                         {
 987                                 *command_p[j-1]++; /* remove dodgy ":" */
 988                                 break;
 989                                 /* parameter like this marks end of the sequence */
 990                         }
 991                 }
 992         }
 993         return j; /* returns total number of items in the list */
 994 }
 995
 996 void process_command(userrec *user, char* cmd)
 997 {
 998         char *parameters;
 999         char *command;
1000         char *command_p[127];
1001         char p[MAXBUF], temp[MAXBUF];
1002         int j, items, cmd_found;
1003
1004         for (int i = 0; i < 127; i++)
1005                 command_p[i] = NULL;
1006
1007         if (!user)
1008         {
1009                 return;
1010         }
1011         if (!cmd)
1012         {
1013                 return;
1014         }
1015         if (!cmd[0])
1016         {
1017                 return;
1018         }
1019
1020         int total_params = 0;
1021         if (strlen(cmd)>2)
1022         {
1023                 for (unsigned int q = 0; q < strlen(cmd)-1; q++)
1024                 {
1025                         if ((cmd[q] == ' ') && (cmd[q+1] == ':'))
1026                         {
1027                                 total_params++;
1028                                 // found a 'trailing', we dont count them after this.
1029                                 break;
1030                         }
1031                         if (cmd[q] == ' ')
1032                                 total_params++;
1033                 }
1034         }
1035
1036         // another phidjit bug...
1037         if (total_params > 126)
1038         {
1039                 *(strchr(cmd,' ')) = '\0';
1040                 WriteServ(user->fd,"421 %s %s :Too many parameters given",user->nick,cmd);
1041                 return;
1042         }
1043
1044         strlcpy(temp,cmd,MAXBUF);
1045
1046         std::string tmp = cmd;
1047         for (int i = 0; i <= MODCOUNT; i++)
1048         {
1049                 std::string oldtmp = tmp;
1050                 modules[i]->OnServerRaw(tmp,true,user);
1051                 if (oldtmp != tmp)
1052                 {
1053                         log(DEBUG,"A Module changed the input string!");
1054                         log(DEBUG,"New string: %s",tmp.c_str());
1055                         log(DEBUG,"Old string: %s",oldtmp.c_str());
1056                         break;
1057                 }
1058         }
1059         strlcpy(cmd,tmp.c_str(),MAXBUF);
1060         strlcpy(temp,cmd,MAXBUF);
1061
1062         if (!strchr(cmd,' '))
1063         {
1064                 /* no parameters, lets skip the formalities and not chop up
1065                  * the string */
1066                 log(DEBUG,"About to preprocess command with no params");
1067                 items = 0;
1068                 command_p[0] = NULL;
1069                 parameters = NULL;
1070                 for (unsigned int i = 0; i <= strlen(cmd); i++)
1071                 {
1072                         cmd[i] = toupper(cmd[i]);
1073                 }
1074                 command = cmd;
1075         }
1076         else
1077         {
1078                 strcpy(cmd,"");
1079                 j = 0;
1080                 /* strip out extraneous linefeeds through mirc's crappy pasting (thanks Craig) */
1081                 for (unsigned int i = 0; i < strlen(temp); i++)
1082                 {
1083                         if ((temp[i] != 10) && (temp[i] != 13) && (temp[i] != 0) && (temp[i] != 7))
1084                         {
1085                                 cmd[j++] = temp[i];
1086                                 cmd[j] = 0;
1087                         }
1088                 }
1089                 /* split the full string into a command plus parameters */
1090                 parameters = p;
1091                 strcpy(p," ");
1092                 command = cmd;
1093                 if (strchr(cmd,' '))
1094                 {
1095                         for (unsigned int i = 0; i <= strlen(cmd); i++)
1096                         {
1097                                 /* capitalise the command ONLY, leave params intact */
1098                                 cmd[i] = toupper(cmd[i]);
1099                                 /* are we nearly there yet?! :P */
1100                                 if (cmd[i] == ' ')
1101                                 {
1102                                         command = cmd;
1103                                         parameters = cmd+i+1;
1104                                         cmd[i] = '\0';
1105                                         break;
1106                                 }
1107                         }
1108                 }
1109                 else
1110                 {
1111                         for (unsigned int i = 0; i <= strlen(cmd); i++)
1112                         {
1113                                 cmd[i] = toupper(cmd[i]);
1114                         }
1115                 }
1116
1117         }
1118         cmd_found = 0;
1119
1120         if (strlen(command)>MAXCOMMAND)
1121         {
1122                 WriteServ(user->fd,"421 %s %s :Command too long",user->nick,command);
1123                 return;
1124         }
1125
1126         for (unsigned int x = 0; x < strlen(command); x++)
1127         {
1128                 if (((command[x] < 'A') || (command[x] > 'Z')) && (command[x] != '.'))
1129                 {
1130                         if (((command[x] < '0') || (command[x]> '9')) && (command[x] != '-'))
1131                         {
1132                                 if (strchr("@!\"$%^&*(){}[]_=+;:'#~,<>/?\\|`",command[x]))
1133                                 {
1134                                         stats->statsUnknown++;
1135                                         WriteServ(user->fd,"421 %s %s :Unknown command",user->nick,command);
1136                                         return;
1137                                 }
1138                         }
1139                 }
1140         }
1141
1142         for (unsigned int i = 0; i != cmdlist.size(); i++)
1143         {
1144                 if (cmdlist[i].command[0])
1145                 {
1146                         if (strlen(command)>=(strlen(cmdlist[i].command))) if (!strncmp(command, cmdlist[i].command,MAXCOMMAND))
1147                         {
1148                                 if (parameters)
1149                                 {
1150                                         if (parameters[0])
1151                                         {
1152                                                 items = process_parameters(command_p,parameters);
1153                                         }
1154                                         else
1155                                         {
1156                                                 items = 0;
1157                                                 command_p[0] = NULL;
1158                                         }
1159                                 }
1160                                 else
1161                                 {
1162                                         items = 0;
1163                                         command_p[0] = NULL;
1164                                 }
1165
1166                                 if (user)
1167                                 {
1168                                         /* activity resets the ping pending timer */
1169                                         user->nping = TIME + user->pingmax;
1170                                         if ((items) < cmdlist[i].min_params)
1171                                         {
1172                                                 log(DEBUG,"process_command: not enough parameters: %s %s",user->nick,command);
1173                                                 WriteServ(user->fd,"461 %s %s :Not enough parameters",user->nick,command);
1174                                                 return;
1175                                         }
1176                                         if ((!strchr(user->modes,cmdlist[i].flags_needed)) && (cmdlist[i].flags_needed))
1177                                         {
1178                                                 log(DEBUG,"process_command: permission denied: %s %s",user->nick,command);
1179                                                 WriteServ(user->fd,"481 %s :Permission Denied- You do not have the required operator privilages",user->nick);
1180                                                 cmd_found = 1;
1181                                                 return;
1182                                         }
1183                                         if ((cmdlist[i].flags_needed) && (!user->HasPermission(command)))
1184                                         {
1185                                                 log(DEBUG,"process_command: permission denied: %s %s",user->nick,command);
1186                                                 WriteServ(user->fd,"481 %s :Permission Denied- Oper type %s does not have access to command %s",user->nick,user->oper,command);
1187                                                 cmd_found = 1;
1188                                                 return;
1189                                         }
1190                                         /* if the command isnt USER, PASS, or NICK, and nick is empty,
1191                                          * deny command! */
1192                                         if ((strncmp(command,"USER",4)) && (strncmp(command,"NICK",4)) && (strncmp(command,"PASS",4)))
1193                                         {
1194                                                 if ((!isnick(user->nick)) || (user->registered != 7))
1195                                                 {
1196                                                         log(DEBUG,"process_command: not registered: %s %s",user->nick,command);
1197                                                         WriteServ(user->fd,"451 %s :You have not registered",command);
1198                                                         return;
1199                                                 }
1200                                         }
1201                                         if ((user->registered == 7) && (!strchr(user->modes,'o')))
1202                                         {
1203                                                 std::stringstream dcmds(Config->DisabledCommands);
1204                                                 while (!dcmds.eof())
1205                                                 {
1206                                                         std::string thiscmd;
1207                                                         dcmds >> thiscmd;
1208                                                         if (!strcasecmp(thiscmd.c_str(),command))
1209                                                         {
1210                                                                 // command is disabled!
1211                                                                 WriteServ(user->fd,"421 %s %s :This command has been disabled.",user->nick,command);
1212                                                                 return;
1213                                                         }
1214                                                 }
1215                                         }
1216                                         if ((user->registered == 7) || (!strncmp(command,"USER",4)) || (!strncmp(command,"NICK",4)) || (!strncmp(command,"PASS",4)))
1217                                         {
1218                                                 if (cmdlist[i].handler_function)
1219                                                 {
1220
1221                                                         /* ikky /stats counters */
1222                                                         if (temp)
1223                                                         {
1224                                                                 cmdlist[i].use_count++;
1225                                                                 cmdlist[i].total_bytes+=strlen(temp);
1226                                                         }
1227
1228                                                         int MOD_RESULT = 0;
1229                                                         FOREACH_RESULT(OnPreCommand(command,command_p,items,user));
1230                                                         if (MOD_RESULT == 1) {
1231                                                                 return;
1232                                                         }
1233
1234                                                         /* WARNING: nothing may come after the
1235                                                          * command handler call, as the handler
1236                                                          * may free the user structure! */
1237
1238                                                         cmdlist[i].handler_function(command_p,items,user);
1239                                                 }
1240                                                 return;
1241                                         }
1242                                         else
1243                                         {
1244                                                 WriteServ(user->fd,"451 %s :You have not registered",command);
1245                                                 return;
1246                                         }
1247                                 }
1248                                 cmd_found = 1;
1249                         }
1250                 }
1251         }
1252         if ((!cmd_found) && (user))
1253         {
1254                 stats->statsUnknown++;
1255                 WriteServ(user->fd,"421 %s %s :Unknown command",user->nick,command);
1256         }
1257 }
1258
1259 bool removecommands(const char* source)
1260 {
1261         bool go_again = true;
1262         while (go_again)
1263         {
1264                 go_again = false;
1265                 for (std::deque<command_t>::iterator i = cmdlist.begin(); i != cmdlist.end(); i++)
1266                 {
1267                         if (!strcmp(i->source,source))
1268                         {
1269                                 log(DEBUG,"removecommands(%s) Removing dependent command: %s",i->source,i->command);
1270                                 cmdlist.erase(i);
1271                                 go_again = true;
1272                                 break;
1273                         }
1274                 }
1275         }
1276         return true;
1277 }
1278
1279
1280 void process_buffer(const char* cmdbuf,userrec *user)
1281 {
1282         if (!user)
1283         {
1284                 log(DEFAULT,"*** BUG *** process_buffer was given an invalid parameter");
1285                 return;
1286         }
1287         char cmd[MAXBUF];
1288         if (!cmdbuf)
1289         {
1290                 log(DEFAULT,"*** BUG *** process_buffer was given an invalid parameter");
1291                 return;
1292         }
1293         if (!cmdbuf[0])
1294         {
1295                 return;
1296         }
1297         while (*cmdbuf == ' ') cmdbuf++; // strip leading spaces
1298
1299         strlcpy(cmd,cmdbuf,MAXBUF);
1300         if (!cmd[0])
1301         {
1302                 return;
1303         }
1304         int sl = strlen(cmd)-1;
1305         if ((cmd[sl] == 13) || (cmd[sl] == 10))
1306         {
1307                 cmd[sl] = '\0';
1308         }
1309         sl = strlen(cmd)-1;
1310         if ((cmd[sl] == 13) || (cmd[sl] == 10))
1311         {
1312                 cmd[sl] = '\0';
1313         }
1314         sl = strlen(cmd)-1;
1315         while (cmd[sl] == ' ') // strip trailing spaces
1316         {
1317                 cmd[sl] = '\0';
1318                 sl = strlen(cmd)-1;
1319         }
1320
1321         if (!cmd[0])
1322         {
1323                 return;
1324         }
1325         log(DEBUG,"CMDIN: %s %s",user->nick,cmd);
1326         tidystring(cmd);
1327         if ((user) && (cmd))
1328         {
1329                 process_command(user,cmd);
1330         }
1331 }
1332
1333 char MODERR[MAXBUF];
1334
1335 char* ModuleError()
1336 {
1337         return MODERR;
1338 }
1339
1340 void erase_factory(int j)
1341 {
1342         int v = 0;
1343         for (std::vector<ircd_module*>::iterator t = factory.begin(); t != factory.end(); t++)
1344         {
1345                 if (v == j)
1346                 {
1347                         factory.erase(t);
1348                         factory.push_back(NULL);
1349                         return;
1350                 }
1351                 v++;
1352         }
1353 }
1354
1355 void erase_module(int j)
1356 {
1357         int v1 = 0;
1358         for (std::vector<Module*>::iterator m = modules.begin(); m!= modules.end(); m++)
1359         {
1360                 if (v1 == j)
1361                 {
1362                         delete *m;
1363                         modules.erase(m);
1364                         modules.push_back(NULL);
1365                         break;
1366                 }
1367                 v1++;
1368         }
1369         int v2 = 0;
1370         for (std::vector<std::string>::iterator v = Config->module_names.begin(); v != Config->module_names.end(); v++)
1371         {
1372                 if (v2 == j)
1373                 {
1374                        Config->module_names.erase(v);
1375                        break;
1376                 }
1377                 v2++;
1378         }
1379
1380 }
1381
1382 bool UnloadModule(const char* filename)
1383 {
1384         std::string filename_str = filename;
1385         for (unsigned int j = 0; j != Config->module_names.size(); j++)
1386         {
1387                 if (Config->module_names[j] == filename_str)
1388                 {
1389                         if (modules[j]->GetVersion().Flags & VF_STATIC)
1390                         {
1391                                 log(DEFAULT,"Failed to unload STATIC module %s",filename);
1392                                 snprintf(MODERR,MAXBUF,"Module not unloadable (marked static)");
1393                                 return false;
1394                         }
1395                         /* Give the module a chance to tidy out all its metadata */
1396                         for (chan_hash::iterator c = chanlist.begin(); c != chanlist.end(); c++)
1397                         {
1398                                 modules[j]->OnCleanup(TYPE_CHANNEL,c->second);
1399                         }
1400                         for (user_hash::iterator u = clientlist.begin(); u != clientlist.end(); u++)
1401                         {
1402                                 modules[j]->OnCleanup(TYPE_USER,u->second);
1403                         }
1404                         FOREACH_MOD OnUnloadModule(modules[j],Config->module_names[j]);
1405                         // found the module
1406                         log(DEBUG,"Deleting module...");
1407                         erase_module(j);
1408                         log(DEBUG,"Erasing module entry...");
1409                         erase_factory(j);
1410                         log(DEBUG,"Removing dependent commands...");
1411                         removecommands(filename);
1412                         log(DEFAULT,"Module %s unloaded",filename);
1413                         MODCOUNT--;
1414                         return true;
1415                 }
1416         }
1417         log(DEFAULT,"Module %s is not loaded, cannot unload it!",filename);
1418         snprintf(MODERR,MAXBUF,"Module not loaded");
1419         return false;
1420 }
1421
1422 bool LoadModule(const char* filename)
1423 {
1424         char modfile[MAXBUF];
1425 #ifdef STATIC_LINK
1426         snprintf(modfile,MAXBUF,"%s",filename);
1427 #else
1428         snprintf(modfile,MAXBUF,"%s/%s",Config->ModPath,filename);
1429 #endif
1430         std::string filename_str = filename;
1431 #ifndef STATIC_LINK
1432         if (!DirValid(modfile))
1433         {
1434                 log(DEFAULT,"Module %s is not within the modules directory.",modfile);
1435                 snprintf(MODERR,MAXBUF,"Module %s is not within the modules directory.",modfile);
1436                 return false;
1437         }
1438 #endif
1439         log(DEBUG,"Loading module: %s",modfile);
1440 #ifndef STATIC_LINK
1441         if (FileExists(modfile))
1442         {
1443 #endif
1444                 for (unsigned int j = 0; j < Config->module_names.size(); j++)
1445                 {
1446                         if (Config->module_names[j] == filename_str)
1447                         {
1448                                 log(DEFAULT,"Module %s is already loaded, cannot load a module twice!",modfile);
1449                                 snprintf(MODERR,MAXBUF,"Module already loaded");
1450                                 return false;
1451                         }
1452                 }
1453                 ircd_module* a = new ircd_module(modfile);
1454                 factory[MODCOUNT+1] = a;
1455                 if (factory[MODCOUNT+1]->LastError())
1456                 {
1457                         log(DEFAULT,"Unable to load %s: %s",modfile,factory[MODCOUNT+1]->LastError());
1458                         snprintf(MODERR,MAXBUF,"Loader/Linker error: %s",factory[MODCOUNT+1]->LastError());
1459                         MODCOUNT--;
1460                         return false;
1461                 }
1462                 if (factory[MODCOUNT+1]->factory)
1463                 {
1464                         Module* m = factory[MODCOUNT+1]->factory->CreateModule(MyServer);
1465                         modules[MODCOUNT+1] = m;
1466                         /* save the module and the module's classfactory, if
1467                          * this isnt done, random crashes can occur :/ */
1468                         Config->module_names.push_back(filename);
1469                 }
1470                 else
1471                 {
1472                         log(DEFAULT,"Unable to load %s",modfile);
1473                         snprintf(MODERR,MAXBUF,"Factory function failed!");
1474                         return false;
1475                 }
1476 #ifndef STATIC_LINK
1477         }
1478         else
1479         {
1480                 log(DEFAULT,"InspIRCd: startup: Module Not Found %s",modfile);
1481                 snprintf(MODERR,MAXBUF,"Module file could not be found");
1482                 return false;
1483         }
1484 #endif
1485         MODCOUNT++;
1486         FOREACH_MOD OnLoadModule(modules[MODCOUNT],filename_str);
1487         return true;
1488 }
1489
1490 int BindPorts()
1491 {
1492         char configToken[MAXBUF], Addr[MAXBUF], Type[MAXBUF];
1493         int clientportcount = 0;
1494         for (int count = 0; count < Config->ConfValueEnum("bind",&Config->config_f); count++)
1495         {
1496                 Config->ConfValue("bind","port",count,configToken,&Config->config_f);
1497                 Config->ConfValue("bind","address",count,Addr,&Config->config_f);
1498                 Config->ConfValue("bind","type",count,Type,&Config->config_f);
1499                 if (strcmp(Type,"servers"))
1500                 {
1501                         // modules handle server bind types now,
1502                         // its not a typo in the strcmp.
1503                         ports[clientportcount] = atoi(configToken);
1504                         strlcpy(Config->addrs[clientportcount],Addr,256);
1505                         clientportcount++;
1506                         log(DEBUG,"InspIRCd: startup: read binding %s:%s [%s] from config",Addr,configToken, Type);
1507                 }
1508         }
1509         portCount = clientportcount;
1510
1511         for (int count = 0; count < portCount; count++)
1512         {
1513                 if ((openSockfd[boundPortCount] = OpenTCPSocket()) == ERROR)
1514                 {
1515                         log(DEBUG,"InspIRCd: startup: bad fd %lu",(unsigned long)openSockfd[boundPortCount]);
1516                         return(ERROR);
1517                 }
1518                 if (BindSocket(openSockfd[boundPortCount],client,server,ports[count],Config->addrs[count]) == ERROR)
1519                 {
1520                         log(DEFAULT,"InspIRCd: startup: failed to bind port %lu",(unsigned long)ports[count]);
1521                 }
1522                 else    /* well we at least bound to one socket so we'll continue */
1523                 {
1524                         boundPortCount++;
1525                 }
1526         }
1527
1528         /* if we didn't bind to anything then abort */
1529         if (!boundPortCount)
1530         {
1531                 log(DEFAULT,"InspIRCd: startup: no ports bound, bailing!");
1532                 printf("\nERROR: Was not able to bind any of %lu ports! Please check your configuration.\n\n", (unsigned long)portCount);
1533                 return (ERROR);
1534         }
1535
1536         return boundPortCount;
1537 }
1538
1539 int InspIRCd::Run()
1540 {
1541         bool expire_run = false;
1542         std::vector<int> activefds;
1543         int incomingSockfd;
1544         int in_port;
1545         userrec* cu = NULL;
1546         InspSocket* s = NULL;
1547         InspSocket* s_del = NULL;
1548         char* target;
1549         unsigned int numberactive;
1550         sockaddr_in sock_us;     // our port number
1551         socklen_t uslen;         // length of our port number
1552
1553         /* Beta 7 moved all this stuff out of the main function
1554          * into smaller sub-functions, much tidier -- Brain
1555          */
1556         OpenLog(argv, argc);
1557         Config->ClearStack();
1558         Config->Read(true,NULL);
1559         CheckRoot();
1560         SetupCommandTable();
1561         AddServerName(Config->ServerName);
1562         CheckDie();
1563         boundPortCount = BindPorts();
1564
1565         printf("\n");
1566         startup_time = time(NULL);
1567
1568         if (!Config->nofork)
1569         {
1570                 if (DaemonSeed() == ERROR)
1571                 {
1572                         printf("ERROR: could not go into daemon mode. Shutting down.\n");
1573                         Exit(ERROR);
1574                 }
1575         }
1576
1577         /* Because of limitations in kqueue on freebsd, we must fork BEFORE we
1578          * initialize the socket engine.
1579          */
1580         SE = new SocketEngine();
1581
1582         /* We must load the modules AFTER initializing the socket engine, now */
1583         LoadAllModules();
1584
1585         printf("\nInspIRCd is now running!\n");
1586         if (!Config->nofork)
1587         {
1588                 freopen("/dev/null","w",stdout);
1589                 freopen("/dev/null","w",stderr);
1590         }
1591
1592         /* Add the listening sockets used for client inbound connections
1593          * to the socket engine
1594          */
1595         for (int count = 0; count < portCount; count++)
1596                 SE->AddFd(openSockfd[count],true,X_LISTEN);
1597
1598         WritePID(Config->PID);
1599
1600         /* main loop, this never returns */
1601         for (;;)
1602         {
1603                 /* time() seems to be a pretty expensive syscall, so avoid calling it too much.
1604                  * Once per loop iteration is pleanty.
1605                  */
1606                 OLDTIME = TIME;
1607                 TIME = time(NULL);
1608
1609                 /* Run background module timers every few seconds
1610                  * (the docs say modules shouldnt rely on accurate
1611                  * timing using this event, so we dont have to
1612                  * time this exactly).
1613                  */
1614                 if (((TIME % 8) == 0) && (!expire_run))
1615                 {
1616                         expire_lines();
1617                         FOREACH_MOD OnBackgroundTimer(TIME);
1618                         expire_run = true;
1619                         continue;
1620                 }
1621                 if ((TIME % 8) == 1)
1622                         expire_run = false;
1623
1624                 /* Once a second, do the background processing */
1625                 if (TIME != OLDTIME)
1626                         while (DoBackgroundUserStuff(TIME));
1627
1628                 /* Call the socket engine to wait on the active
1629                  * file descriptors. The socket engine has everything's
1630                  * descriptors in its list... dns, modules, users,
1631                  * servers... so its nice and easy, just one call.
1632                  */
1633                 SE->Wait(activefds);
1634
1635                 /**
1636                  * Now process each of the fd's. For users, we have a fast
1637                  * lookup table which can find a user by file descriptor, so
1638                  * processing them by fd isnt expensive. If we have a lot of
1639                  * listening ports or module sockets though, things could get
1640                  * ugly.
1641                  */
1642                 numberactive = activefds.size();
1643                 for (unsigned int activefd = 0; activefd < numberactive; activefd++)
1644                 {
1645                         int socket_type = SE->GetType(activefds[activefd]);
1646                         switch (socket_type)
1647                         {
1648                                 case X_ESTAB_CLIENT:
1649
1650                                         cu = fd_ref_table[activefds[activefd]];
1651                                         if (cu)
1652                                                 ProcessUser(cu);
1653
1654                                 break;
1655
1656                                 case X_ESTAB_MODULE:
1657
1658                                         /* Process module-owned sockets.
1659                                          * Modules are encouraged to inherit their sockets from
1660                                          * InspSocket so we can process them neatly like this.
1661                                          */
1662                                         s = socket_ref[activefds[activefd]];
1663
1664                                         if ((s) && (!s->Poll()))
1665                                         {
1666                                                 log(DEBUG,"Socket poll returned false, close and bail");
1667                                                 SE->DelFd(s->GetFd());
1668                                                 for (std::vector<InspSocket*>::iterator a = module_sockets.begin(); a < module_sockets.end(); a++)
1669                                                 {
1670                                                         s_del = (InspSocket*)*a;
1671                                                         if ((s_del) && (s_del->GetFd() == activefds[activefd]))
1672                                                         {
1673                                                                 module_sockets.erase(a);
1674                                                                 break;
1675                                                         }
1676                                                 }
1677                                                 s->Close();
1678                                                 delete s;
1679                                         }
1680
1681                                 break;
1682
1683                                 case X_ESTAB_DNS:
1684
1685                                         /* When we are using single-threaded dns,
1686                                          * the sockets for dns end up in our mainloop.
1687                                          * When we are using multi-threaded dns,
1688                                          * each thread has its own basic poll() loop
1689                                          * within it, making them 'fire and forget'
1690                                          * and independent of the mainloop.
1691                                          */
1692 #ifndef THREADED_DNS
1693                                         dns_poll(activefds[activefd]);
1694 #endif
1695                                 break;
1696
1697                                 case X_LISTEN:
1698
1699                                         /* It's a listener */
1700                                         uslen = sizeof(sock_us);
1701                                         length = sizeof(client);
1702                                         incomingSockfd = accept (activefds[activefd],(struct sockaddr*)&client,&length);
1703                                         if (!getsockname(incomingSockfd,(sockaddr*)&sock_us,&uslen))
1704                                         {
1705                                                 in_port = ntohs(sock_us.sin_port);
1706                                                 log(DEBUG,"Accepted socket %d",incomingSockfd);
1707                                                 target = (char*)inet_ntoa(client.sin_addr);
1708                                                 /* Years and years ago, we used to resolve here
1709                                                  * using gethostbyaddr(). That is sucky and we
1710                                                  * don't do that any more...
1711                                                  */
1712                                                 if (incomingSockfd >= 0)
1713                                                 {
1714                                                         FOREACH_MOD OnRawSocketAccept(incomingSockfd, target, in_port);
1715                                                         stats->statsAccept++;
1716                                                         AddClient(incomingSockfd, target, in_port, false, target);
1717                                                         log(DEBUG,"Adding client on port %lu fd=%lu",(unsigned long)in_port,(unsigned long)incomingSockfd);
1718                                                 }
1719                                                 else
1720                                                 {
1721                                                         WriteOpers("*** WARNING: accept() failed on port %lu (%s)",(unsigned long)in_port,target);
1722                                                         log(DEBUG,"accept failed: %lu",(unsigned long)in_port);
1723                                                         stats->statsRefused++;
1724                                                 }
1725                                         }
1726                                         else
1727                                         {
1728                                                 log(DEBUG,"Couldnt look up the port number for fd %lu (OS BROKEN?!)",incomingSockfd);
1729                                                 shutdown(incomingSockfd,2);
1730                                                 close(incomingSockfd);
1731                                         }
1732                                 break;
1733
1734                                 default:
1735                                         /* Something went wrong if we're in here.
1736                                          * In fact, so wrong, im not quite sure
1737                                          * what we would do, so for now, its going
1738                                          * to safely do bugger all.
1739                                          */
1740                                 break;
1741                         }
1742                 }
1743
1744         }
1745         /* This is never reached -- we hope! */
1746         return 0;
1747 }
1748
1749 /**********************************************************************************/
1750
1751 /**
1752  * An ircd in four lines! bwahahaha. ahahahahaha. ahahah *cough*.
1753  */
1754
1755 int main(int argc, char** argv)
1756 {
1757         InspIRCd TittyBiscuits = new InspIRCd(argc, argv);
1758         TittyBiscuits->Run();
1759         delete TittyBiscuits;
1760         return 0;
1761 }
1762