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 typedef std::map<irc::string,char*> opertype_t;
  58 typedef opertype_t operclass_t;
  59
  60 opertype_t opertypes;
  61 operclass_t operclass;
  62
  63 void ReadClassesAndTypes()
  64 {
  65         char TypeName[MAXBUF],Classes[MAXBUF],ClassName[MAXBUF],CommandList[MAXBUF];
  66         for (opertype_t::iterator n = opertypes.begin(); n != opertypes.end(); n++)
  67         {
  68                 if (n->second)
  69                         delete[] n->second;
  70         }
  71         for (operclass_t::iterator n = operclass.begin(); n != operclass.end(); n++)
  72         {
  73                 if (n->second)
  74                         delete[] n->second;
  75         }
  76         opertypes.clear();
  77         operclass.clear();
  78         for (int j =0; j < Config->ConfValueEnum("type",&Config->config_f); j++)
  79         {
  80                 Config->ConfValue("type","name",j,TypeName,&Config->config_f);
  81                 Config->ConfValue("type","classes",j,Classes,&Config->config_f);
  82                 opertypes[TypeName] = strdup(Classes);
  83                 log(DEBUG,"Read oper TYPE '%s' with classes '%s'",TypeName,Classes);
  84         }
  85         for (int k =0; k < Config->ConfValueEnum("class",&Config->config_f); k++)
  86         {
  87                 Config->ConfValue("class","name",k,ClassName,&Config->config_f);
  88                 Config->ConfValue("class","commands",k,CommandList,&Config->config_f);
  89                 operclass[ClassName] = strdup(CommandList);
  90                 log(DEBUG,"Read oper CLASS '%s' with commands '%s'",ClassName,CommandList);
  91         }
  92 }
  93
  94 template<typename T> inline string ConvToStr(const T &in)
  95 {
  96         stringstream tmp;
  97         if (!(tmp << in)) return string();
  98         return tmp.str();
  99 }
 100
 101 userrec::userrec()
 102 {
 103         // the PROPER way to do it, AVOID bzero at *ALL* costs
 104         *password = *nick = *ident = *host = *dhost = *fullname = *modes = *awaymsg = *oper = 0;
 105         server = (char*)FindServerNamePtr(Config->ServerName);
 106         reset_due = TIME;
 107         lines_in = fd = lastping = signon = idle_lastmsg = nping = registered = 0;
 108         timeout = flood = port = bytes_in = bytes_out = cmds_in = cmds_out = 0;
 109         haspassed = dns_done = false;
 110         recvq = "";
 111         sendq = "";
 112         chans.clear();
 113         invites.clear();
 114 }
 115
 116 userrec::~userrec()
 117 {
 118 }
 119
 120 void userrec::MakeHost(char* nhost)
 121 {
 122         /* This is much faster than snprintf */
 123         char* t = nhost;
 124         for(char* n = ident; *n; n++)
 125                 *t++ = *n;
 126         *t++ = '@';
 127         for(char* n = host; *n; n++)
 128                 *t++ = *n;
 129         *t = 0;
 130 }
 131
 132 void userrec::CloseSocket()
 133 {
 134         shutdown(this->fd,2);
 135         close(this->fd);
 136 }
 137
 138 char* userrec::GetFullHost()
 139 {
 140         static char result[MAXBUF];
 141         char* t = result;
 142         for(char* n = nick; *n; n++)
 143                 *t++ = *n;
 144         *t++ = '!';
 145         for(char* n = ident; *n; n++)
 146                 *t++ = *n;
 147         *t++ = '@';
 148         for(char* n = dhost; *n; n++)
 149                 *t++ = *n;
 150         *t = 0;
 151         return result;
 152 }
 153
 154 char* userrec::MakeWildHost()
 155 {
 156         static char nresult[MAXBUF];
 157         char* t = nresult;
 158         *t++ = '*';     *t++ = '!';
 159         *t++ = '*';     *t++ = '@';
 160         for(char* n = dhost; *n; n++)
 161                 *t++ = *n;
 162         *t = 0;
 163         return nresult;
 164 }
 165
 166 int userrec::ReadData(void* buffer, size_t size)
 167 {
 168         if (this->fd > -1)
 169         {
 170                 return read(this->fd, buffer, size);
 171         }
 172         else return 0;
 173 }
 174
 175
 176 char* userrec::GetFullRealHost()
 177 {
 178         static char fresult[MAXBUF];
 179         char* t = fresult;
 180         for(char* n = nick; *n; n++)
 181                 *t++ = *n;
 182         *t++ = '!';
 183         for(char* n = ident; *n; n++)
 184                 *t++ = *n;
 185         *t++ = '@';
 186         for(char* n = host; *n; n++)
 187                 *t++ = *n;
 188         *t = 0;
 189         return fresult;
 190 }
 191
 192 bool userrec::IsInvited(irc::string &channel)
 193 {
 194         for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 195         {
 196                 irc::string compare = i->channel;
 197                 if (compare == channel)
 198                 {
 199                         return true;
 200                 }
 201         }
 202         return false;
 203 }
 204
 205 InvitedList* userrec::GetInviteList()
 206 {
 207         return &invites;
 208 }
 209
 210 void userrec::InviteTo(irc::string &channel)
 211 {
 212         Invited i;
 213         i.channel = channel;
 214         invites.push_back(i);
 215 }
 216
 217 void userrec::RemoveInvite(irc::string &channel)
 218 {
 219         log(DEBUG,"Removing invites");
 220         if (invites.size())
 221         {
 222                 for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 223                 {
 224                         irc::string compare = i->channel;
 225                         if (compare == channel)
 226                         {
 227                                 invites.erase(i);
 228                                 return;
 229                         }
 230                 }
 231         }
 232 }
 233
 234 bool userrec::HasPermission(std::string &command)
 235 {
 236         char* mycmd;
 237         char* savept;
 238         char* savept2;
 239
 240         // users on remote servers can completely bypass
 241         // all permissions based checks.
 242         // This prevents desyncs when one server has different
 243         // type/class tags to another.
 244         if (!IS_LOCAL(this))
 245                 return true;
 246
 247         // are they even an oper at all?
 248         if (*this->oper)
 249         {
 250                 opertype_t::iterator iter_opertype = opertypes.find(this->oper);
 251                 if (iter_opertype != opertypes.end())
 252                 {
 253                         char* Classes = strdup(iter_opertype->second);
 254                         char* myclass = strtok_r(Classes," ",&savept);
 255                         while (myclass)
 256                         {
 257                                 operclass_t::iterator iter_operclass = operclass.find(myclass);
 258                                 if (iter_operclass != operclass.end())
 259                                 {
 260                                         char* CommandList = strdup(iter_operclass->second);
 261                                         mycmd = strtok_r(CommandList," ",&savept2);
 262                                         while (mycmd)
 263                                         {
 264                                                 if ((!strcasecmp(mycmd,command.c_str())) || (*mycmd == '*'))
 265                                                 {
 266                                                         free(Classes);
 267                                                         free(CommandList);
 268                                                         return true;
 269                                                 }
 270                                                 mycmd = strtok_r(NULL," ",&savept2);
 271                                         }
 272                                         free(CommandList);
 273                                 }
 274                                 myclass = strtok_r(NULL," ",&savept);
 275                         }
 276                         free(Classes);
 277                 }
 278         }
 279         return false;
 280 }
 281
 282
 283 bool userrec::AddBuffer(std::string a)
 284 {
 285         std::string b = "";
 286         for (unsigned int i = 0; i < a.length(); i++)
 287                 if ((a[i] != '\r') && (a[i] != '\0') && (a[i] != 7))
 288                         b = b + a[i];
 289         std::stringstream stream(recvq);
 290         stream << b;
 291         recvq = stream.str();
 292         unsigned int i = 0;
 293         // count the size of the first line in the buffer.
 294         while (i < recvq.length())
 295         {
 296                 if (recvq[i++] == '\n')
 297                         break;
 298         }
 299         if (recvq.length() > (unsigned)this->recvqmax)
 300         {
 301                 this->SetWriteError("RecvQ exceeded");
 302                 WriteOpers("*** User %s RecvQ of %d exceeds connect class maximum of %d",this->nick,recvq.length(),this->recvqmax);
 303         }
 304         // return false if we've had more than 600 characters WITHOUT
 305         // a carriage return (this is BAD, drop the socket)
 306         return (i < 600);
 307 }
 308
 309 bool userrec::BufferIsReady()
 310 {
 311         unsigned int t = recvq.length();
 312         for (unsigned int i = 0; i < t; i++)
 313                 if (recvq[i] == '\n')
 314                         return true;
 315         return false;
 316 }
 317
 318 void userrec::ClearBuffer()
 319 {
 320         recvq = "";
 321 }
 322
 323 std::string userrec::GetBuffer()
 324 {
 325         if (recvq == "")
 326                 return "";
 327         char* line = (char*)recvq.c_str();
 328         std::string ret = "";
 329         while ((*line != '\n') && (*line))
 330         {
 331                 ret = ret + *line;
 332                 line++;
 333         }
 334         if ((*line == '\n') || (*line == '\r'))
 335                 line++;
 336         recvq = line;
 337         return ret;
 338 }
 339
 340 void userrec::AddWriteBuf(std::string data)
 341 {
 342         if (this->GetWriteError() != "")
 343                 return;
 344         if (sendq.length() + data.length() > (unsigned)this->sendqmax)
 345         {
 346                 /* Fix by brain - Set the error text BEFORE calling writeopers, because
 347                  * if we dont it'll recursively  call here over and over again trying
 348                  * to repeatedly add the text to the sendq!
 349                  */
 350                 this->SetWriteError("SendQ exceeded");
 351                 WriteOpers("*** User %s SendQ of %d exceeds connect class maximum of %d",this->nick,sendq.length() + data.length(),this->sendqmax);
 352                 return;
 353         }
 354         std::stringstream stream;
 355         stream << sendq << data;
 356         sendq = stream.str();
 357 }
 358
 359 // send AS MUCH OF THE USERS SENDQ as we are able to (might not be all of it)
 360 void userrec::FlushWriteBuf()
 361 {
 362         if ((sendq.length()) && (this->fd != FD_MAGIC_NUMBER))
 363         {
 364                 char* tb = (char*)this->sendq.c_str();
 365                 int n_sent = write(this->fd,tb,this->sendq.length());
 366                 if (n_sent == -1)
 367                 {
 368                         this->SetWriteError(strerror(errno));
 369                 }
 370                 else
 371                 {
 372                         // advance the queue
 373                         tb += n_sent;
 374                         this->sendq = tb;
 375                         // update the user's stats counters
 376                         this->bytes_out += n_sent;
 377                         this->cmds_out++;
 378                 }
 379         }
 380 }
 381
 382 void userrec::SetWriteError(std::string error)
 383 {
 384         log(DEBUG,"Setting error string for %s to '%s'",this->nick,error.c_str());
 385         // don't try to set the error twice, its already set take the first string.
 386         if (this->WriteError == "")
 387                 this->WriteError = error;
 388 }
 389
 390 std::string userrec::GetWriteError()
 391 {
 392         return this->WriteError;
 393 }
 394
 395 void AddOper(userrec* user)
 396 {
 397         log(DEBUG,"Oper added to optimization list");
 398         all_opers.push_back(user);
 399 }
 400
 401 void DeleteOper(userrec* user)
 402 {
 403         for (std::vector<userrec*>::iterator a = all_opers.begin(); a < all_opers.end(); a++)
 404         {
 405                 if (*a == user)
 406                 {
 407                         log(DEBUG,"Oper removed from optimization list");
 408                         all_opers.erase(a);
 409                         return;
 410                 }
 411         }
 412 }
 413
 414 void kill_link(userrec *user,const char* r)
 415 {
 416         user_hash::iterator iter = clientlist.find(user->nick);
 417
 418         char reason[MAXBUF];
 419
 420         strlcpy(reason,r,MAXBUF-1);
 421
 422         if (strlen(reason)>MAXQUIT)
 423         {
 424                 reason[MAXQUIT-1] = '\0';
 425         }
 426
 427         log(DEBUG,"kill_link: %s '%s'",user->nick,reason);
 428         Write(user->fd,"ERROR :Closing link (%s@%s) [%s]",user->ident,user->host,reason);
 429         log(DEBUG,"closing fd %d",user->fd);
 430
 431         if (user->registered == 7) {
 432                 purge_empty_chans(user);
 433                 FOREACH_MOD(I_OnUserQuit,OnUserQuit(user,reason));
 434                 WriteCommonExcept(user,"QUIT :%s",reason);
 435         }
 436
 437         user->FlushWriteBuf();
 438
 439         FOREACH_MOD(I_OnUserDisconnect,OnUserDisconnect(user));
 440
 441         if (user->fd > -1)
 442         {
 443                 if (Config->GetIOHook(user->port))
 444                 {
 445                         try
 446                         {
 447                                 Config->GetIOHook(user->port)->OnRawSocketClose(user->fd);
 448                         }
 449                         catch (ModuleException& modexcept)
 450                         {
 451                                 log(DEBUG,"Module exception cought: %s",modexcept.GetReason());
 452                         }
 453                 }
 454                 ServerInstance->SE->DelFd(user->fd);
 455                 user->CloseSocket();
 456         }
 457
 458         // this must come before the WriteOpers so that it doesnt try to fill their buffer with anything
 459         // if they were an oper with +s.
 460         if (user->registered == 7) {
 461                 // fix by brain: only show local quits because we only show local connects (it just makes SENSE)
 462                 if (user->fd > -1)
 463                         WriteOpers("*** Client exiting: %s!%s@%s [%s]",user->nick,user->ident,user->host,reason);
 464                 AddWhoWas(user);
 465         }
 466
 467         if (iter != clientlist.end())
 468         {
 469                 log(DEBUG,"deleting user hash value %lx",(unsigned long)user);
 470                 if (user->fd > -1)
 471                 {
 472                         fd_ref_table[user->fd] = NULL;
 473                         if (find(local_users.begin(),local_users.end(),user) != local_users.end())
 474                         {
 475                                 local_users.erase(find(local_users.begin(),local_users.end(),user));
 476                                 log(DEBUG,"Delete local user");
 477                         }
 478                 }
 479                 clientlist.erase(iter);
 480         }
 481         delete user;
 482 }
 483
 484 /* adds or updates an entry in the whowas list */
 485 void AddWhoWas(userrec* u)
 486 {
 487         whowas_hash::iterator iter = whowas.find(u->nick);
 488         WhoWasUser *a = new WhoWasUser();
 489         strlcpy(a->nick,u->nick,NICKMAX-1);
 490         strlcpy(a->ident,u->ident,IDENTMAX);
 491         strlcpy(a->dhost,u->dhost,63);
 492         strlcpy(a->host,u->host,63);
 493         strlcpy(a->fullname,u->fullname,MAXGECOS);
 494         if (u->server)
 495                 strlcpy(a->server,u->server,256);
 496         a->signon = u->signon;
 497
 498         /* MAX_WHOWAS:   max number of /WHOWAS items
 499          * WHOWAS_STALE: number of hours before a WHOWAS item is marked as stale and
 500          *               can be replaced by a newer one
 501          */
 502
 503         if (iter == whowas.end())
 504         {
 505                 if (whowas.size() >= (unsigned)WHOWAS_MAX)
 506                 {
 507                         for (whowas_hash::iterator i = whowas.begin(); i != whowas.end(); i++)
 508                         {
 509                                 // 3600 seconds in an hour ;)
 510                                 if ((i->second->signon)<(TIME-(WHOWAS_STALE*3600)))
 511                                 {
 512                                         // delete an old one
 513                                         if (i->second) delete i->second;
 514                                         whowas.erase(i);
 515                                         // replace with new one
 516                                         whowas[a->nick] = a;
 517                                         log(DEBUG,"added WHOWAS entry, purged an old record");
 518                                         return;
 519                                 }
 520                         }
 521                         // no space left and user doesnt exist. Don't leave ram in use!
 522                         delete a;
 523                 }
 524                 else
 525                 {
 526                         log(DEBUG,"added fresh WHOWAS entry");
 527                         whowas[a->nick] = a;
 528                 }
 529         }
 530         else
 531         {
 532                 log(DEBUG,"updated WHOWAS entry");
 533                 if (iter->second) delete iter->second;
 534                 iter->second = a;
 535         }
 536 }
 537
 538 /* add a client connection to the sockets list */
 539 void AddClient(int socket, int port, bool iscached, in_addr ip4)
 540 {
 541         std::string tempnick = ConvToStr(socket) + "-unknown";
 542         user_hash::iterator iter = clientlist.find(tempnick);
 543         const char *ipaddr = inet_ntoa(ip4);
 544         int j = 0;
 545
 546         // fix by brain.
 547         // as these nicknames are 'RFC impossible', we can be sure nobody is going to be
 548         // using one as a registered connection. As theyre per fd, we can also safely assume
 549         // that we wont have collisions. Therefore, if the nick exists in the list, its only
 550         // used by a dead socket, erase the iterator so that the new client may reclaim it.
 551         // this was probably the cause of 'server ignores me when i hammer it with reconnects'
 552         // issue in earlier alphas/betas
 553         if (iter != clientlist.end())
 554         {
 555                 userrec* goner = iter->second;
 556                 delete goner;
 557                 clientlist.erase(iter);
 558         }
 559
 560         log(DEBUG,"AddClient: %d %d %s",socket,port,ipaddr);
 561
 562         clientlist[tempnick] = new userrec();
 563         clientlist[tempnick]->fd = socket;
 564         strlcpy(clientlist[tempnick]->nick,tempnick.c_str(),NICKMAX-1);
 565
 566         /* Smarter than your average bear^H^H^H^Hset of strlcpys. */
 567         for (char* temp = (char*)ipaddr; *temp && j < 64; temp++, j++)
 568                 clientlist[tempnick]->dhost[j] = clientlist[tempnick]->host[j] = *temp;
 569         clientlist[tempnick]->dhost[j] = clientlist[tempnick]->host[j] = 0;
 570
 571         clientlist[tempnick]->server = (char*)FindServerNamePtr(Config->ServerName);
 572         /* We don't need range checking here, we KNOW 'unknown\0' will fit into the ident field. */
 573         strcpy(clientlist[tempnick]->ident, "unknown");
 574
 575         clientlist[tempnick]->registered = 0;
 576         clientlist[tempnick]->signon = TIME + Config->dns_timeout;
 577         clientlist[tempnick]->lastping = 1;
 578         clientlist[tempnick]->ip4 = ip4;
 579         clientlist[tempnick]->port = port;
 580
 581         // set the registration timeout for this user
 582         unsigned long class_regtimeout = 90;
 583         int class_flood = 0;
 584         long class_threshold = 5;
 585         long class_sqmax = 262144;      // 256kb
 586         long class_rqmax = 4096;        // 4k
 587
 588         for (ClassVector::iterator i = Config->Classes.begin(); i != Config->Classes.end(); i++)
 589         {
 590                 if ((i->type == CC_ALLOW) && (match(ipaddr,i->host.c_str())))
 591                 {
 592                         class_regtimeout = (unsigned long)i->registration_timeout;
 593                         class_flood = i->flood;
 594                         clientlist[tempnick]->pingmax = i->pingtime;
 595                         class_threshold = i->threshold;
 596                         class_sqmax = i->sendqmax;
 597                         class_rqmax = i->recvqmax;
 598                         break;
 599                 }
 600         }
 601
 602         clientlist[tempnick]->nping = TIME+clientlist[tempnick]->pingmax + Config->dns_timeout;
 603         clientlist[tempnick]->timeout = TIME+class_regtimeout;
 604         clientlist[tempnick]->flood = class_flood;
 605         clientlist[tempnick]->threshold = class_threshold;
 606         clientlist[tempnick]->sendqmax = class_sqmax;
 607         clientlist[tempnick]->recvqmax = class_rqmax;
 608
 609         ucrec a;
 610         a.channel = NULL;
 611         a.uc_modes = 0;
 612         for (int i = 0; i < MAXCHANS; i++)
 613                 clientlist[tempnick]->chans.push_back(a);
 614
 615         fd_ref_table[socket] = clientlist[tempnick];
 616         local_users.push_back(clientlist[tempnick]);
 617
 618         if (local_users.size() > Config->SoftLimit)
 619         {
 620                 kill_link(clientlist[tempnick],"No more connections allowed");
 621                 return;
 622         }
 623
 624         if (local_users.size() >= MAXCLIENTS)
 625         {
 626                 kill_link(clientlist[tempnick],"No more connections allowed");
 627                 return;
 628         }
 629
 630         // this is done as a safety check to keep the file descriptors within range of fd_ref_table.
 631         // its a pretty big but for the moment valid assumption:
 632         // file descriptors are handed out starting at 0, and are recycled as theyre freed.
 633         // therefore if there is ever an fd over 65535, 65536 clients must be connected to the
 634         // irc server at once (or the irc server otherwise initiating this many connections, files etc)
 635         // which for the time being is a physical impossibility (even the largest networks dont have more
 636         // than about 10,000 users on ONE server!)
 637         if ((unsigned)socket >= MAX_DESCRIPTORS)
 638         {
 639                 kill_link(clientlist[tempnick],"Server is full");
 640                 return;
 641         }
 642         char* e = matches_exception(ipaddr);
 643         if (!e)
 644         {
 645                 char* r = matches_zline(ipaddr);
 646                 if (r)
 647                 {
 648                         char reason[MAXBUF];
 649                         snprintf(reason,MAXBUF,"Z-Lined: %s",r);
 650                         kill_link(clientlist[tempnick],reason);
 651                         return;
 652                 }
 653         }
 654
 655         ServerInstance->SE->AddFd(socket,true,X_ESTAB_CLIENT);
 656
 657         WriteServ(clientlist[tempnick]->fd,"NOTICE Auth :*** Looking up your hostname...");
 658 }
 659
 660 long FindMatchingGlobal(userrec* user)
 661 {
 662         long x = 0;
 663         for (user_hash::const_iterator a = clientlist.begin(); a != clientlist.end(); a++)
 664         {
 665                 if (a->second->ip4.s_addr == user->ip4.s_addr)
 666                         x++;
 667         }
 668         return x;
 669 }
 670
 671 long FindMatchingLocal(userrec* user)
 672 {
 673         long x = 0;
 674         for (std::vector<userrec*>::const_iterator a = local_users.begin(); a != local_users.end(); a++)
 675         {
 676                 userrec* comp = (userrec*)(*a);
 677                 if (comp->ip4.s_addr == user->ip4.s_addr)
 678                         x++;
 679         }
 680         return x;
 681 }
 682
 683 void FullConnectUser(userrec* user, CullList* Goners)
 684 {
 685         ServerInstance->stats->statsConnects++;
 686         user->idle_lastmsg = TIME;
 687         log(DEBUG,"ConnectUser: %s",user->nick);
 688
 689         ConnectClass a = GetClass(user);
 690
 691         if (a.type == CC_DENY)
 692         {
 693                 Goners->AddItem(user,"Unauthorised connection");
 694                 return;
 695         }
 696         if ((*(a.pass.c_str())) && (!user->haspassed))
 697         {
 698                 Goners->AddItem(user,"Invalid password");
 699                 return;
 700         }
 701         if (FindMatchingLocal(user) > a.maxlocal)
 702         {
 703                 Goners->AddItem(user,"No more connections allowed from your host via this connect class (local)");
 704                 WriteOpers("*** WARNING: maximum LOCAL connections (%ld) exceeded for IP %s",a.maxlocal,(char*)inet_ntoa(user->ip4));
 705                 return;
 706         }
 707         else if (FindMatchingGlobal(user) > a.maxglobal)
 708         {
 709                 Goners->AddItem(user,"No more connections allowed from your host via this connect class (global)");
 710                 WriteOpers("*** WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s",a.maxglobal,(char*)inet_ntoa(user->ip4));
 711                 return;
 712         }
 713
 714         char match_against[MAXBUF];
 715         snprintf(match_against,MAXBUF,"%s@%s",user->ident,user->host);
 716         char* e = matches_exception(match_against);
 717         if (!e)
 718         {
 719                 char* r = matches_gline(match_against);
 720                 if (r)
 721                 {
 722                         char reason[MAXBUF];
 723                         snprintf(reason,MAXBUF,"G-Lined: %s",r);
 724                         Goners->AddItem(user,reason);
 725                         return;
 726                 }
 727                 r = matches_kline(user->host);
 728                 if (r)
 729                 {
 730                         char reason[MAXBUF];
 731                         snprintf(reason,MAXBUF,"K-Lined: %s",r);
 732                         Goners->AddItem(user,reason);
 733                         return;
 734                 }
 735         }
 736
 737
 738         WriteServ(user->fd,"NOTICE Auth :Welcome to \002%s\002!",Config->Network);
 739         WriteServ(user->fd,"001 %s :Welcome to the %s IRC Network %s!%s@%s",user->nick,Config->Network,user->nick,user->ident,user->host);
 740         WriteServ(user->fd,"002 %s :Your host is %s, running version %s",user->nick,Config->ServerName,VERSION);
 741         WriteServ(user->fd,"003 %s :This server was created %s %s",user->nick,__TIME__,__DATE__);
 742         WriteServ(user->fd,"004 %s %s %s iowghrasxRVSCWBG lvhopsmntikrcaqbegIOLQRSKVHGCNT vhobeIaqglk",user->nick,Config->ServerName,VERSION);
 743         // anfl @ #ratbox, efnet reminded me that according to the RFC this cant contain more than 13 tokens per line...
 744         // so i'd better split it :)
 745         std::stringstream out(Config->data005);
 746         std::string token = "";
 747         std::string line5 = "";
 748         int token_counter = 0;
 749         while (!out.eof())
 750         {
 751                 out >> token;
 752                 line5 = line5 + token + " ";
 753                 token_counter++;
 754                 if ((token_counter >= 13) || (out.eof() == true))
 755                 {
 756                         WriteServ(user->fd,"005 %s %s:are supported by this server",user->nick,line5.c_str());
 757                         line5 = "";
 758                         token_counter = 0;
 759                 }
 760         }
 761         ShowMOTD(user);
 762
 763         // fix 3 by brain, move registered = 7 below these so that spurious modes and host changes dont go out
 764         // onto the network and produce 'fake direction'
 765         FOREACH_MOD(I_OnUserConnect,OnUserConnect(user));
 766         FOREACH_MOD(I_OnGlobalConnect,OnGlobalConnect(user));
 767         user->registered = 7;
 768         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));
 769 }
 770
 771 /* re-allocates a nick in the user_hash after they change nicknames,
 772  * returns a pointer to the new user as it may have moved */
 773
 774 userrec* ReHashNick(char* Old, char* New)
 775 {
 776         //user_hash::iterator newnick;
 777         user_hash::iterator oldnick = clientlist.find(Old);
 778
 779         log(DEBUG,"ReHashNick: %s %s",Old,New);
 780
 781         if (!strcasecmp(Old,New))
 782         {
 783                 log(DEBUG,"old nick is new nick, skipping");
 784                 return oldnick->second;
 785         }
 786
 787         if (oldnick == clientlist.end()) return NULL; /* doesnt exist */
 788
 789         log(DEBUG,"ReHashNick: Found hashed nick %s",Old);
 790
 791         userrec* olduser = oldnick->second;
 792         clientlist[New] = olduser;
 793         clientlist.erase(oldnick);
 794
 795         log(DEBUG,"ReHashNick: Nick rehashed as %s",New);
 796
 797         return clientlist[New];
 798 }
 799
 800 void force_nickchange(userrec* user,const char* newnick)
 801 {
 802         char nick[MAXBUF];
 803         int MOD_RESULT = 0;
 804
 805         *nick = 0;
 806
 807         FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(user,newnick));
 808         if (MOD_RESULT) {
 809                 ServerInstance->stats->statsCollisions++;
 810                 kill_link(user,"Nickname collision");
 811                 return;
 812         }
 813         if (matches_qline(newnick))
 814         {
 815                 ServerInstance->stats->statsCollisions++;
 816                 kill_link(user,"Nickname collision");
 817                 return;
 818         }
 819
 820         if (user)
 821         {
 822                 if (newnick)
 823                 {
 824                         strlcpy(nick,newnick,MAXBUF-1);
 825                 }
 826                 if (user->registered == 7)
 827                 {
 828                         char* pars[1];
 829                         pars[0] = nick;
 830                         std::string cmd = "NICK";
 831                         ServerInstance->Parser->CallHandler(cmd,pars,1,user);
 832                 }
 833         }
 834 }
 835