src/users.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd is copyright (C) 2002-2006 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 using namespace std;
  18
  19 #include "inspircd_config.h"
  20 #include "channels.h"
  21 #include "connection.h"
  22 #include "users.h"
  23 #include "inspircd.h"
  24 #include <stdio.h>
  25 #ifdef THREADED_DNS
  26 #include <pthread.h>
  27 #include <signal.h>
  28 #endif
  29 #include "inspstring.h"
  30 #include "commands.h"
  31 #include "helperfuncs.h"
  32 #include "typedefs.h"
  33 #include "socketengine.h"
  34 #include "hashcomp.h"
  35 #include "message.h"
  36 #include "wildcard.h"
  37 #include "xline.h"
  38 #include "cull_list.h"
  39
  40 extern InspIRCd* ServerInstance;
  41 extern int WHOWAS_STALE;
  42 extern int WHOWAS_MAX;
  43 extern std::vector<Module*> modules;
  44 extern std::vector<ircd_module*> factory;
  45 extern std::vector<InspSocket*> module_sockets;
  46 extern int MODCOUNT;
  47 extern InspSocket* socket_ref[MAX_DESCRIPTORS];
  48 extern time_t TIME;
  49 extern userrec* fd_ref_table[MAX_DESCRIPTORS];
  50 extern ServerConfig *Config;
  51 extern user_hash clientlist;
  52 extern whowas_hash whowas;
  53 extern std::vector<userrec*> local_users;
  54
  55 std::vector<userrec*> all_opers;
  56
  57 template<typename T> inline string ConvToStr(const T &in)
  58 {
  59         stringstream tmp;
  60         if (!(tmp << in)) return string();
  61         return tmp.str();
  62 }
  63
  64 userrec::userrec()
  65 {
  66         // the PROPER way to do it, AVOID bzero at *ALL* costs
  67         *password = *nick = *ident = *host = *dhost = *fullname = *modes = *awaymsg = *oper = 0;
  68         server = (char*)FindServerNamePtr(Config->ServerName);
  69         reset_due = TIME;
  70         lines_in = fd = lastping = signon = idle_lastmsg = nping = registered = 0;
  71         timeout = flood = port = bytes_in = bytes_out = cmds_in = cmds_out = 0;
  72         haspassed = dns_done = false;
  73         recvq = "";
  74         sendq = "";
  75         chans.clear();
  76         invites.clear();
  77 }
  78
  79 userrec::~userrec()
  80 {
  81 }
  82
  83 void userrec::MakeHost(char* nhost)
  84 {
  85         /* This is much faster than snprintf */
  86         char* t = nhost;
  87         for(char* n = ident; *n; n++)
  88                 *t++ = *n;
  89         *t++ = '@';
  90         for(char* n = host; *n; n++)
  91                 *t++ = *n;
  92         *t = 0;
  93 }
  94
  95 void userrec::CloseSocket()
  96 {
  97         shutdown(this->fd,2);
  98         close(this->fd);
  99 }
 100
 101 char* userrec::GetFullHost()
 102 {
 103         static char result[MAXBUF];
 104         char* t = result;
 105         for(char* n = nick; *n; n++)
 106                 *t++ = *n;
 107         *t++ = '!';
 108         for(char* n = ident; *n; n++)
 109                 *t++ = *n;
 110         *t++ = '@';
 111         for(char* n = dhost; *n; n++)
 112                 *t++ = *n;
 113         *t = 0;
 114         return result;
 115 }
 116
 117 char* userrec::MakeWildHost()
 118 {
 119         static char nresult[MAXBUF];
 120         char* t = nresult;
 121         *t++ = '*';     *t++ = '!';
 122         *t++ = '*';     *t++ = '@';
 123         for(char* n = dhost; *n; n++)
 124                 *t++ = *n;
 125         *t = 0;
 126         return nresult;
 127 }
 128
 129 int userrec::ReadData(void* buffer, size_t size)
 130 {
 131         if (this->fd > -1)
 132         {
 133                 return read(this->fd, buffer, size);
 134         }
 135         else return 0;
 136 }
 137
 138
 139 char* userrec::GetFullRealHost()
 140 {
 141         static char fresult[MAXBUF];
 142         char* t = fresult;
 143         for(char* n = nick; *n; n++)
 144                 *t++ = *n;
 145         *t++ = '!';
 146         for(char* n = ident; *n; n++)
 147                 *t++ = *n;
 148         *t++ = '@';
 149         for(char* n = host; *n; n++)
 150                 *t++ = *n;
 151         *t = 0;
 152         return fresult;
 153 }
 154
 155 bool userrec::IsInvited(irc::string &channel)
 156 {
 157         for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 158         {
 159                 irc::string compare = i->channel;
 160                 if (compare == channel)
 161                 {
 162                         return true;
 163                 }
 164         }
 165         return false;
 166 }
 167
 168 InvitedList* userrec::GetInviteList()
 169 {
 170         return &invites;
 171 }
 172
 173 void userrec::InviteTo(irc::string &channel)
 174 {
 175         Invited i;
 176         i.channel = channel;
 177         invites.push_back(i);
 178 }
 179
 180 void userrec::RemoveInvite(irc::string &channel)
 181 {
 182         log(DEBUG,"Removing invites");
 183         if (invites.size())
 184         {
 185                 for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 186                 {
 187                         irc::string compare = i->channel;
 188                         if (compare == channel)
 189                         {
 190                                 invites.erase(i);
 191                                 return;
 192                         }
 193                 }
 194         }
 195 }
 196
 197 bool userrec::HasPermission(std::string &command)
 198 {
 199         char TypeName[MAXBUF],Classes[MAXBUF],ClassName[MAXBUF],CommandList[MAXBUF];
 200         char* mycmd;
 201         char* savept;
 202         char* savept2;
 203
 204         // users on remote servers can completely bypass
 205         // all permissions based checks.
 206         // This prevents desyncs when one server has different
 207         // type/class tags to another.
 208         if (!IS_LOCAL(this))
 209                 return true;
 210
 211         // are they even an oper at all?
 212         if (*this->oper)
 213         {
 214                 for (int j =0; j < Config->ConfValueEnum("type",&Config->config_f); j++)
 215                 {
 216                         Config->ConfValue("type","name",j,TypeName,&Config->config_f);
 217                         if (!strcmp(TypeName,this->oper))
 218                         {
 219                                 Config->ConfValue("type","classes",j,Classes,&Config->config_f);
 220                                 char* myclass = strtok_r(Classes," ",&savept);
 221                                 while (myclass)
 222                                 {
 223                                         for (int k =0; k < Config->ConfValueEnum("class",&Config->config_f); k++)
 224                                         {
 225                                                 Config->ConfValue("class","name",k,ClassName,&Config->config_f);
 226                                                 if (!strcmp(ClassName,myclass))
 227                                                 {
 228                                                         Config->ConfValue("class","commands",k,CommandList,&Config->config_f);
 229                                                         mycmd = strtok_r(CommandList," ",&savept2);
 230                                                         while (mycmd)
 231                                                         {
 232                                                                 if ((!strcasecmp(mycmd,command.c_str())) || (*mycmd == '*'))
 233                                                                 {
 234                                                                         return true;
 235                                                                 }
 236                                                                 mycmd = strtok_r(NULL," ",&savept2);
 237                                                         }
 238                                                 }
 239                                         }
 240                                         myclass = strtok_r(NULL," ",&savept);
 241                                 }
 242                         }
 243                 }
 244         }
 245         return false;
 246 }
 247
 248
 249 bool userrec::AddBuffer(std::string a)
 250 {
 251         std::string b = "";
 252         for (unsigned int i = 0; i < a.length(); i++)
 253                 if ((a[i] != '\r') && (a[i] != '\0') && (a[i] != 7))
 254                         b = b + a[i];
 255         std::stringstream stream(recvq);
 256         stream << b;
 257         recvq = stream.str();
 258         unsigned int i = 0;
 259         // count the size of the first line in the buffer.
 260         while (i < recvq.length())
 261         {
 262                 if (recvq[i++] == '\n')
 263                         break;
 264         }
 265         if (recvq.length() > (unsigned)this->recvqmax)
 266         {
 267                 this->SetWriteError("RecvQ exceeded");
 268                 WriteOpers("*** User %s RecvQ of %d exceeds connect class maximum of %d",this->nick,recvq.length(),this->recvqmax);
 269         }
 270         // return false if we've had more than 600 characters WITHOUT
 271         // a carriage return (this is BAD, drop the socket)
 272         return (i < 600);
 273 }
 274
 275 bool userrec::BufferIsReady()
 276 {
 277         unsigned int t = recvq.length();
 278         for (unsigned int i = 0; i < t; i++)
 279                 if (recvq[i] == '\n')
 280                         return true;
 281         return false;
 282 }
 283
 284 void userrec::ClearBuffer()
 285 {
 286         recvq = "";
 287 }
 288
 289 std::string userrec::GetBuffer()
 290 {
 291         if (recvq == "")
 292                 return "";
 293         char* line = (char*)recvq.c_str();
 294         std::string ret = "";
 295         while ((*line != '\n') && (*line))
 296         {
 297                 ret = ret + *line;
 298                 line++;
 299         }
 300         if ((*line == '\n') || (*line == '\r'))
 301                 line++;
 302         recvq = line;
 303         return ret;
 304 }
 305
 306 void userrec::AddWriteBuf(std::string data)
 307 {
 308         if (this->GetWriteError() != "")
 309                 return;
 310         if (sendq.length() + data.length() > (unsigned)this->sendqmax)
 311         {
 312                 /* Fix by brain - Set the error text BEFORE calling writeopers, because
 313                  * if we dont it'll recursively  call here over and over again trying
 314                  * to repeatedly add the text to the sendq!
 315                  */
 316                 this->SetWriteError("SendQ exceeded");
 317                 WriteOpers("*** User %s SendQ of %d exceeds connect class maximum of %d",this->nick,sendq.length() + data.length(),this->sendqmax);
 318                 return;
 319         }
 320         std::stringstream stream;
 321         stream << sendq << data;
 322         sendq = stream.str();
 323 }
 324
 325 // send AS MUCH OF THE USERS SENDQ as we are able to (might not be all of it)
 326 void userrec::FlushWriteBuf()
 327 {
 328         if ((sendq.length()) && (this->fd != FD_MAGIC_NUMBER))
 329         {
 330                 char* tb = (char*)this->sendq.c_str();
 331                 int n_sent = write(this->fd,tb,this->sendq.length());
 332                 if (n_sent == -1)
 333                 {
 334                         this->SetWriteError(strerror(errno));
 335                 }
 336                 else
 337                 {
 338                         // advance the queue
 339                         tb += n_sent;
 340                         this->sendq = tb;
 341                         // update the user's stats counters
 342                         this->bytes_out += n_sent;
 343                         this->cmds_out++;
 344                 }
 345         }
 346 }
 347
 348 void userrec::SetWriteError(std::string error)
 349 {
 350         log(DEBUG,"Setting error string for %s to '%s'",this->nick,error.c_str());
 351         // don't try to set the error twice, its already set take the first string.
 352         if (this->WriteError == "")
 353                 this->WriteError = error;
 354 }
 355
 356 std::string userrec::GetWriteError()
 357 {
 358         return this->WriteError;
 359 }
 360
 361 void AddOper(userrec* user)
 362 {
 363         log(DEBUG,"Oper added to optimization list");
 364         all_opers.push_back(user);
 365 }
 366
 367 void DeleteOper(userrec* user)
 368 {
 369         for (std::vector<userrec*>::iterator a = all_opers.begin(); a < all_opers.end(); a++)
 370         {
 371                 if (*a == user)
 372                 {
 373                         log(DEBUG,"Oper removed from optimization list");
 374                         all_opers.erase(a);
 375                         return;
 376                 }
 377         }
 378 }
 379
 380 void kill_link(userrec *user,const char* r)
 381 {
 382         user_hash::iterator iter = clientlist.find(user->nick);
 383
 384         char reason[MAXBUF];
 385
 386         strlcpy(reason,r,MAXBUF-1);
 387
 388         if (strlen(reason)>MAXQUIT)
 389         {
 390                 reason[MAXQUIT-1] = '\0';
 391         }
 392
 393         log(DEBUG,"kill_link: %s '%s'",user->nick,reason);
 394         Write(user->fd,"ERROR :Closing link (%s@%s) [%s]",user->ident,user->host,reason);
 395         log(DEBUG,"closing fd %d",user->fd);
 396
 397         if (user->registered == 7) {
 398                 purge_empty_chans(user);
 399                 FOREACH_MOD(I_OnUserQuit,OnUserQuit(user,reason));
 400                 WriteCommonExcept(user,"QUIT :%s",reason);
 401         }
 402
 403         user->FlushWriteBuf();
 404
 405         FOREACH_MOD(I_OnUserDisconnect,OnUserDisconnect(user));
 406
 407         if (user->fd > -1)
 408         {
 409                 if (Config->GetIOHook(user->port))
 410                 {
 411                         try
 412                         {
 413                                 Config->GetIOHook(user->port)->OnRawSocketClose(user->fd);
 414                         }
 415                         catch (ModuleException& modexcept)
 416                         {
 417                                 log(DEBUG,"Module exception cought: %s",modexcept.GetReason());
 418                         }
 419                 }
 420                 ServerInstance->SE->DelFd(user->fd);
 421                 user->CloseSocket();
 422         }
 423
 424         // this must come before the WriteOpers so that it doesnt try to fill their buffer with anything
 425         // if they were an oper with +s.
 426         if (user->registered == 7) {
 427                 // fix by brain: only show local quits because we only show local connects (it just makes SENSE)
 428                 if (user->fd > -1)
 429                         WriteOpers("*** Client exiting: %s!%s@%s [%s]",user->nick,user->ident,user->host,reason);
 430                 AddWhoWas(user);
 431         }
 432
 433         if (iter != clientlist.end())
 434         {
 435                 log(DEBUG,"deleting user hash value %lx",(unsigned long)user);
 436                 if (user->fd > -1)
 437                 {
 438                         fd_ref_table[user->fd] = NULL;
 439                         if (find(local_users.begin(),local_users.end(),user) != local_users.end())
 440                         {
 441                                 local_users.erase(find(local_users.begin(),local_users.end(),user));
 442                                 log(DEBUG,"Delete local user");
 443                         }
 444                 }
 445                 clientlist.erase(iter);
 446         }
 447         delete user;
 448 }
 449
 450 /* adds or updates an entry in the whowas list */
 451 void AddWhoWas(userrec* u)
 452 {
 453         whowas_hash::iterator iter = whowas.find(u->nick);
 454         WhoWasUser *a = new WhoWasUser();
 455         strlcpy(a->nick,u->nick,NICKMAX-1);
 456         strlcpy(a->ident,u->ident,IDENTMAX);
 457         strlcpy(a->dhost,u->dhost,63);
 458         strlcpy(a->host,u->host,63);
 459         strlcpy(a->fullname,u->fullname,MAXGECOS);
 460         if (u->server)
 461                 strlcpy(a->server,u->server,256);
 462         a->signon = u->signon;
 463
 464         /* MAX_WHOWAS:   max number of /WHOWAS items
 465          * WHOWAS_STALE: number of hours before a WHOWAS item is marked as stale and
 466          *               can be replaced by a newer one
 467          */
 468
 469         if (iter == whowas.end())
 470         {
 471                 if (whowas.size() >= (unsigned)WHOWAS_MAX)
 472                 {
 473                         for (whowas_hash::iterator i = whowas.begin(); i != whowas.end(); i++)
 474                         {
 475                                 // 3600 seconds in an hour ;)
 476                                 if ((i->second->signon)<(TIME-(WHOWAS_STALE*3600)))
 477                                 {
 478                                         // delete an old one
 479                                         if (i->second) delete i->second;
 480                                         whowas.erase(i);
 481                                         // replace with new one
 482                                         whowas[a->nick] = a;
 483                                         log(DEBUG,"added WHOWAS entry, purged an old record");
 484                                         return;
 485                                 }
 486                         }
 487                         // no space left and user doesnt exist. Don't leave ram in use!
 488                         delete a;
 489                 }
 490                 else
 491                 {
 492                         log(DEBUG,"added fresh WHOWAS entry");
 493                         whowas[a->nick] = a;
 494                 }
 495         }
 496         else
 497         {
 498                 log(DEBUG,"updated WHOWAS entry");
 499                 if (iter->second) delete iter->second;
 500                 iter->second = a;
 501         }
 502 }
 503
 504 /* add a client connection to the sockets list */
 505 void AddClient(int socket, int port, bool iscached, in_addr ip4)
 506 {
 507         std::string tempnick = ConvToStr(socket) + "-unknown";
 508         user_hash::iterator iter = clientlist.find(tempnick);
 509         const char *ipaddr = inet_ntoa(ip4);
 510         int j = 0;
 511
 512         // fix by brain.
 513         // as these nicknames are 'RFC impossible', we can be sure nobody is going to be
 514         // using one as a registered connection. As theyre per fd, we can also safely assume
 515         // that we wont have collisions. Therefore, if the nick exists in the list, its only
 516         // used by a dead socket, erase the iterator so that the new client may reclaim it.
 517         // this was probably the cause of 'server ignores me when i hammer it with reconnects'
 518         // issue in earlier alphas/betas
 519         if (iter != clientlist.end())
 520         {
 521                 userrec* goner = iter->second;
 522                 delete goner;
 523                 clientlist.erase(iter);
 524         }
 525
 526         log(DEBUG,"AddClient: %d %d %s",socket,port,ipaddr);
 527
 528         clientlist[tempnick] = new userrec();
 529         clientlist[tempnick]->fd = socket;
 530         strlcpy(clientlist[tempnick]->nick,tempnick.c_str(),NICKMAX-1);
 531
 532         /* Smarter than your average bear^H^H^H^Hset of strlcpys. */
 533         for (char* temp = (char*)ipaddr; *temp && j < 64; temp++, j++)
 534                 clientlist[tempnick]->dhost[j] = clientlist[tempnick]->host[j] = *temp;
 535         clientlist[tempnick]->dhost[j] = clientlist[tempnick]->host[j] = 0;
 536
 537         clientlist[tempnick]->server = (char*)FindServerNamePtr(Config->ServerName);
 538         /* We don't need range checking here, we KNOW 'unknown\0' will fit into the ident field. */
 539         strcpy(clientlist[tempnick]->ident, "unknown");
 540
 541         clientlist[tempnick]->registered = 0;
 542         clientlist[tempnick]->signon = TIME + Config->dns_timeout;
 543         clientlist[tempnick]->lastping = 1;
 544         clientlist[tempnick]->ip4 = ip4;
 545         clientlist[tempnick]->port = port;
 546
 547         // set the registration timeout for this user
 548         unsigned long class_regtimeout = 90;
 549         int class_flood = 0;
 550         long class_threshold = 5;
 551         long class_sqmax = 262144;      // 256kb
 552         long class_rqmax = 4096;        // 4k
 553
 554         for (ClassVector::iterator i = Config->Classes.begin(); i != Config->Classes.end(); i++)
 555         {
 556                 if ((i->type == CC_ALLOW) && (match(ipaddr,i->host.c_str())))
 557                 {
 558                         class_regtimeout = (unsigned long)i->registration_timeout;
 559                         class_flood = i->flood;
 560                         clientlist[tempnick]->pingmax = i->pingtime;
 561                         class_threshold = i->threshold;
 562                         class_sqmax = i->sendqmax;
 563                         class_rqmax = i->recvqmax;
 564                         break;
 565                 }
 566         }
 567
 568         clientlist[tempnick]->nping = TIME+clientlist[tempnick]->pingmax + Config->dns_timeout;
 569         clientlist[tempnick]->timeout = TIME+class_regtimeout;
 570         clientlist[tempnick]->flood = class_flood;
 571         clientlist[tempnick]->threshold = class_threshold;
 572         clientlist[tempnick]->sendqmax = class_sqmax;
 573         clientlist[tempnick]->recvqmax = class_rqmax;
 574
 575         ucrec a;
 576         a.channel = NULL;
 577         a.uc_modes = 0;
 578         for (int i = 0; i < MAXCHANS; i++)
 579                 clientlist[tempnick]->chans.push_back(a);
 580
 581         fd_ref_table[socket] = clientlist[tempnick];
 582         local_users.push_back(clientlist[tempnick]);
 583
 584         if (local_users.size() > Config->SoftLimit)
 585         {
 586                 kill_link(clientlist[tempnick],"No more connections allowed");
 587                 return;
 588         }
 589
 590         if (local_users.size() >= MAXCLIENTS)
 591         {
 592                 kill_link(clientlist[tempnick],"No more connections allowed");
 593                 return;
 594         }
 595
 596         // this is done as a safety check to keep the file descriptors within range of fd_ref_table.
 597         // its a pretty big but for the moment valid assumption:
 598         // file descriptors are handed out starting at 0, and are recycled as theyre freed.
 599         // therefore if there is ever an fd over 65535, 65536 clients must be connected to the
 600         // irc server at once (or the irc server otherwise initiating this many connections, files etc)
 601         // which for the time being is a physical impossibility (even the largest networks dont have more
 602         // than about 10,000 users on ONE server!)
 603         if ((unsigned)socket >= MAX_DESCRIPTORS)
 604         {
 605                 kill_link(clientlist[tempnick],"Server is full");
 606                 return;
 607         }
 608         char* e = matches_exception(ipaddr);
 609         if (!e)
 610         {
 611                 char* r = matches_zline(ipaddr);
 612                 if (r)
 613                 {
 614                         char reason[MAXBUF];
 615                         snprintf(reason,MAXBUF,"Z-Lined: %s",r);
 616                         kill_link(clientlist[tempnick],reason);
 617                         return;
 618                 }
 619         }
 620
 621         ServerInstance->SE->AddFd(socket,true,X_ESTAB_CLIENT);
 622
 623         WriteServ(clientlist[tempnick]->fd,"NOTICE Auth :*** Looking up your hostname...");
 624 }
 625
 626 long FindMatchingGlobal(userrec* user)
 627 {
 628         long x = 0;
 629         for (user_hash::const_iterator a = clientlist.begin(); a != clientlist.end(); a++)
 630         {
 631                 if (a->second->ip4.s_addr == user->ip4.s_addr)
 632                         x++;
 633         }
 634         return x;
 635 }
 636
 637 long FindMatchingLocal(userrec* user)
 638 {
 639         long x = 0;
 640         for (std::vector<userrec*>::const_iterator a = local_users.begin(); a != local_users.end(); a++)
 641         {
 642                 userrec* comp = (userrec*)(*a);
 643                 if (comp->ip4.s_addr == user->ip4.s_addr)
 644                         x++;
 645         }
 646         return x;
 647 }
 648
 649 void FullConnectUser(userrec* user, CullList* Goners)
 650 {
 651         ServerInstance->stats->statsConnects++;
 652         user->idle_lastmsg = TIME;
 653         log(DEBUG,"ConnectUser: %s",user->nick);
 654
 655         ConnectClass a = GetClass(user);
 656
 657         if (a.type == CC_DENY)
 658         {
 659                 Goners->AddItem(user,"Unauthorised connection");
 660                 return;
 661         }
 662         if ((*(a.pass.c_str())) && (!user->haspassed))
 663         {
 664                 Goners->AddItem(user,"Invalid password");
 665                 return;
 666         }
 667         if (FindMatchingLocal(user) > a.maxlocal)
 668         {
 669                 Goners->AddItem(user,"No more connections allowed from your host via this connect class (local)");
 670                 WriteOpers("*** WARNING: maximum LOCAL connections (%ld) exceeded for IP %s",a.maxlocal,(char*)inet_ntoa(user->ip4));
 671                 return;
 672         }
 673         else if (FindMatchingGlobal(user) > a.maxglobal)
 674         {
 675                 Goners->AddItem(user,"No more connections allowed from your host via this connect class (global)");
 676                 WriteOpers("*** WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s",a.maxglobal,(char*)inet_ntoa(user->ip4));
 677                 return;
 678         }
 679
 680         char match_against[MAXBUF];
 681         snprintf(match_against,MAXBUF,"%s@%s",user->ident,user->host);
 682         char* e = matches_exception(match_against);
 683         if (!e)
 684         {
 685                 char* r = matches_gline(match_against);
 686                 if (r)
 687                 {
 688                         char reason[MAXBUF];
 689                         snprintf(reason,MAXBUF,"G-Lined: %s",r);
 690                         Goners->AddItem(user,reason);
 691                         return;
 692                 }
 693                 r = matches_kline(user->host);
 694                 if (r)
 695                 {
 696                         char reason[MAXBUF];
 697                         snprintf(reason,MAXBUF,"K-Lined: %s",r);
 698                         Goners->AddItem(user,reason);
 699                         return;
 700                 }
 701         }
 702
 703
 704         WriteServ(user->fd,"NOTICE Auth :Welcome to \002%s\002!",Config->Network);
 705         WriteServ(user->fd,"001 %s :Welcome to the %s IRC Network %s!%s@%s",user->nick,Config->Network,user->nick,user->ident,user->host);
 706         WriteServ(user->fd,"002 %s :Your host is %s, running version %s",user->nick,Config->ServerName,VERSION);
 707         WriteServ(user->fd,"003 %s :This server was created %s %s",user->nick,__TIME__,__DATE__);
 708         WriteServ(user->fd,"004 %s %s %s iowghrasxRVSCWBG lvhopsmntikrcaqbegIOLQRSKVHGCNT vhobeIaqglk",user->nick,Config->ServerName,VERSION);
 709         // anfl @ #ratbox, efnet reminded me that according to the RFC this cant contain more than 13 tokens per line...
 710         // so i'd better split it :)
 711         std::stringstream out(Config->data005);
 712         std::string token = "";
 713         std::string line5 = "";
 714         int token_counter = 0;
 715         while (!out.eof())
 716         {
 717                 out >> token;
 718                 line5 = line5 + token + " ";
 719                 token_counter++;
 720                 if ((token_counter >= 13) || (out.eof() == true))
 721                 {
 722                         WriteServ(user->fd,"005 %s %s:are supported by this server",user->nick,line5.c_str());
 723                         line5 = "";
 724                         token_counter = 0;
 725                 }
 726         }
 727         ShowMOTD(user);
 728
 729         // fix 3 by brain, move registered = 7 below these so that spurious modes and host changes dont go out
 730         // onto the network and produce 'fake direction'
 731         FOREACH_MOD(I_OnUserConnect,OnUserConnect(user));
 732         FOREACH_MOD(I_OnGlobalConnect,OnGlobalConnect(user));
 733         user->registered = 7;
 734         WriteOpers("*** Client connecting on port %lu: %s!%s@%s [%s]",(unsigned long)user->port,user->nick,user->ident,user->host,(char*)inet_ntoa(user->ip4));
 735 }
 736
 737 /* re-allocates a nick in the user_hash after they change nicknames,
 738  * returns a pointer to the new user as it may have moved */
 739
 740 userrec* ReHashNick(char* Old, char* New)
 741 {
 742         //user_hash::iterator newnick;
 743         user_hash::iterator oldnick = clientlist.find(Old);
 744
 745         log(DEBUG,"ReHashNick: %s %s",Old,New);
 746
 747         if (!strcasecmp(Old,New))
 748         {
 749                 log(DEBUG,"old nick is new nick, skipping");
 750                 return oldnick->second;
 751         }
 752
 753         if (oldnick == clientlist.end()) return NULL; /* doesnt exist */
 754
 755         log(DEBUG,"ReHashNick: Found hashed nick %s",Old);
 756
 757         userrec* olduser = oldnick->second;
 758         clientlist[New] = olduser;
 759         clientlist.erase(oldnick);
 760
 761         log(DEBUG,"ReHashNick: Nick rehashed as %s",New);
 762
 763         return clientlist[New];
 764 }
 765
 766 void force_nickchange(userrec* user,const char* newnick)
 767 {
 768         char nick[MAXBUF];
 769         int MOD_RESULT = 0;
 770
 771         *nick = 0;
 772
 773         FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(user,newnick));
 774         if (MOD_RESULT) {
 775                 ServerInstance->stats->statsCollisions++;
 776                 kill_link(user,"Nickname collision");
 777                 return;
 778         }
 779         if (matches_qline(newnick))
 780         {
 781                 ServerInstance->stats->statsCollisions++;
 782                 kill_link(user,"Nickname collision");
 783                 return;
 784         }
 785
 786         if (user)
 787         {
 788                 if (newnick)
 789                 {
 790                         strlcpy(nick,newnick,MAXBUF-1);
 791                 }
 792                 if (user->registered == 7)
 793                 {
 794                         char* pars[1];
 795                         pars[0] = nick;
 796                         std::string cmd = "NICK";
 797                         ServerInstance->Parser->CallHandler(cmd,pars,1,user);
 798                 }
 799         }
 800 }
 801