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 #include "inspircd_config.h"
  18 #include "configreader.h"
  19 #include "channels.h"
  20 #include "connection.h"
  21 #include "users.h"
  22 #include "inspircd.h"
  23 #include <stdio.h>
  24 #ifdef THREADED_DNS
  25 #include <pthread.h>
  26 #include <signal.h>
  27 #endif
  28 #include "inspstring.h"
  29 #include "commands.h"
  30 #include "helperfuncs.h"
  31 #include "typedefs.h"
  32 #include "socketengine.h"
  33 #include "hashcomp.h"
  34 #include "message.h"
  35 #include "wildcard.h"
  36 #include "xline.h"
  37 #include "cull_list.h"
  38
  39 extern InspIRCd* ServerInstance;
  40 extern int WHOWAS_STALE;
  41 extern int WHOWAS_MAX;
  42 extern std::vector<Module*> modules;
  43 extern std::vector<ircd_module*> factory;
  44 extern std::vector<InspSocket*> module_sockets;
  45 extern int MODCOUNT;
  46 extern InspSocket* socket_ref[MAX_DESCRIPTORS];
  47 extern time_t TIME;
  48 extern userrec* fd_ref_table[MAX_DESCRIPTORS];
  49 extern ServerConfig *Config;
  50 extern user_hash clientlist;
  51
  52 whowas_users whowas;
  53
  54 extern std::vector<userrec*> local_users;
  55
  56 std::vector<userrec*> all_opers;
  57
  58 typedef std::map<irc::string,char*> opertype_t;
  59 typedef opertype_t operclass_t;
  60
  61 opertype_t opertypes;
  62 operclass_t operclass;
  63
  64 bool InitTypes(const char* tag)
  65 {
  66         for (opertype_t::iterator n = opertypes.begin(); n != opertypes.end(); n++)
  67         {
  68                 if (n->second)
  69                         delete[] n->second;
  70         }
  71
  72         opertypes.clear();
  73         return true;
  74 }
  75
  76 bool InitClasses(const char* tag)
  77 {
  78         for (operclass_t::iterator n = operclass.begin(); n != operclass.end(); n++)
  79         {
  80                 if (n->second)
  81                         delete[] n->second;
  82         }
  83
  84         operclass.clear();
  85         return true;
  86 }
  87
  88 bool DoType(const char* tag, char** entries, void** values, int* types)
  89 {
  90         char* TypeName = (char*)values[0];
  91         char* Classes = (char*)values[1];
  92
  93         opertypes[TypeName] = strdup(Classes);
  94         log(DEBUG,"Read oper TYPE '%s' with classes '%s'",TypeName,Classes);
  95         return true;
  96 }
  97
  98 bool DoClass(const char* tag, char** entries, void** values, int* types)
  99 {
 100         char* ClassName = (char*)values[0];
 101         char* CommandList = (char*)values[1];
 102
 103         operclass[ClassName] = strdup(CommandList);
 104         log(DEBUG,"Read oper CLASS '%s' with commands '%s'",ClassName,CommandList);
 105         return true;
 106 }
 107
 108 bool DoneClassesAndTypes(const char* tag)
 109 {
 110         return true;
 111 }
 112
 113 bool userrec::ProcessNoticeMasks(const char *sm)
 114 {
 115         bool adding = true;
 116         const char *c = sm;
 117
 118         while (c && *c)
 119         {
 120                 switch (*c)
 121                 {
 122                         case '+':
 123                                 adding = true;
 124                                 break;
 125                         case '-':
 126                                 adding = false;
 127                                 break;
 128                         default:
 129                                 if ((*c >= 'A') && (*c <= 'z'))
 130                                         this->SetNoticeMask(*c, adding);
 131                                 break;
 132                 }
 133
 134                 *c++;
 135         }
 136
 137         return true;
 138 }
 139
 140 bool userrec::IsNoticeMaskSet(unsigned char sm)
 141 {
 142         return (snomasks[sm-65]);
 143 }
 144
 145 void userrec::SetNoticeMask(unsigned char sm, bool value)
 146 {
 147         snomasks[sm-65] = value;
 148 }
 149
 150 const char* userrec::FormatNoticeMasks()
 151 {
 152         static char data[MAXBUF];
 153         int offset = 0;
 154
 155         for (int n = 0; n < 64; n++)
 156         {
 157                 if (snomasks[n])
 158                         data[offset++] = n+65;
 159         }
 160
 161         data[offset] = 0;
 162         return data;
 163 }
 164
 165
 166
 167 bool userrec::IsModeSet(unsigned char m)
 168 {
 169         return (modes[m-65]);
 170 }
 171
 172 void userrec::SetMode(unsigned char m, bool value)
 173 {
 174         modes[m-65] = value;
 175 }
 176
 177 const char* userrec::FormatModes()
 178 {
 179         static char data[MAXBUF];
 180         int offset = 0;
 181         for (int n = 0; n < 64; n++)
 182         {
 183                 if (modes[n])
 184                         data[offset++] = n+65;
 185         }
 186         data[offset] = 0;
 187         return data;
 188 }
 189
 190 userrec::userrec()
 191 {
 192         // the PROPER way to do it, AVOID bzero at *ALL* costs
 193         *password = *nick = *ident = *host = *dhost = *fullname = *awaymsg = *oper = 0;
 194         server = (char*)FindServerNamePtr(Config->ServerName);
 195         reset_due = TIME;
 196         lines_in = fd = lastping = signon = idle_lastmsg = nping = registered = 0;
 197         timeout = flood = port = bytes_in = bytes_out = cmds_in = cmds_out = 0;
 198         haspassed = dns_done = false;
 199         recvq = "";
 200         sendq = "";
 201         chans.clear();
 202         invites.clear();
 203         chans.resize(MAXCHANS);
 204         memset(modes,0,sizeof(modes));
 205 #ifndef THREADED_DNS
 206         dns_fd = -1;
 207 #endif
 208         for (unsigned int n = 0; n < MAXCHANS; n++)
 209         {
 210                 ucrec* x = new ucrec();
 211                 chans[n] = x;
 212                 x->channel = NULL;
 213                 x->uc_modes = 0;
 214         }
 215 }
 216
 217 userrec::~userrec()
 218 {
 219         for (std::vector<ucrec*>::iterator n = chans.begin(); n != chans.end(); n++)
 220         {
 221                 ucrec* x = (ucrec*)*n;
 222                 DELETE(x);
 223         }
 224         if (dns_fd > -1)
 225         {
 226                 shutdown(dns_fd, 2);
 227                 close(dns_fd);
 228         }
 229 }
 230
 231 /* XXX - minor point, other *Host functions return a char *, this one creates it. Might be nice to be consistant? */
 232 void userrec::MakeHost(char* nhost)
 233 {
 234         /* This is much faster than snprintf */
 235         char* t = nhost;
 236         for(char* n = ident; *n; n++)
 237                 *t++ = *n;
 238         *t++ = '@';
 239         for(char* n = host; *n; n++)
 240                 *t++ = *n;
 241         *t = 0;
 242 }
 243
 244 void userrec::CloseSocket()
 245 {
 246         shutdown(this->fd,2);
 247         close(this->fd);
 248 }
 249
 250 char* userrec::GetFullHost()
 251 {
 252         static char result[MAXBUF];
 253         char* t = result;
 254         for(char* n = nick; *n; n++)
 255                 *t++ = *n;
 256         *t++ = '!';
 257         for(char* n = ident; *n; n++)
 258                 *t++ = *n;
 259         *t++ = '@';
 260         for(char* n = dhost; *n; n++)
 261                 *t++ = *n;
 262         *t = 0;
 263         return result;
 264 }
 265
 266 char* userrec::MakeWildHost()
 267 {
 268         static char nresult[MAXBUF];
 269         char* t = nresult;
 270         *t++ = '*';     *t++ = '!';
 271         *t++ = '*';     *t++ = '@';
 272         for(char* n = dhost; *n; n++)
 273                 *t++ = *n;
 274         *t = 0;
 275         return nresult;
 276 }
 277
 278 int userrec::ReadData(void* buffer, size_t size)
 279 {
 280         if (this->fd > -1)
 281         {
 282                 return read(this->fd, buffer, size);
 283         }
 284         else
 285                 return 0;
 286 }
 287
 288
 289 char* userrec::GetFullRealHost()
 290 {
 291         static char fresult[MAXBUF];
 292         char* t = fresult;
 293         for(char* n = nick; *n; n++)
 294                 *t++ = *n;
 295         *t++ = '!';
 296         for(char* n = ident; *n; n++)
 297                 *t++ = *n;
 298         *t++ = '@';
 299         for(char* n = host; *n; n++)
 300                 *t++ = *n;
 301         *t = 0;
 302         return fresult;
 303 }
 304
 305 bool userrec::IsInvited(irc::string &channel)
 306 {
 307         for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 308         {
 309                 irc::string compare = i->channel;
 310
 311                 if (compare == channel)
 312                 {
 313                         return true;
 314                 }
 315         }
 316
 317         return false;
 318 }
 319
 320 InvitedList* userrec::GetInviteList()
 321 {
 322         return &invites;
 323 }
 324
 325 void userrec::InviteTo(irc::string &channel)
 326 {
 327         Invited i;
 328
 329         i.channel = channel;
 330         invites.push_back(i);
 331 }
 332
 333 void userrec::RemoveInvite(irc::string &channel)
 334 {
 335         log(DEBUG,"Removing invites");
 336
 337         if (invites.size())
 338         {
 339                 for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 340                 {
 341                         irc::string compare = i->channel;
 342
 343                         if (compare == channel)
 344                         {
 345                                 invites.erase(i);
 346                                 return;
 347                         }
 348                 }
 349         }
 350 }
 351
 352 bool userrec::HasPermission(const std::string &command)
 353 {
 354         char* mycmd;
 355         char* savept;
 356         char* savept2;
 357
 358         /*
 359          * users on remote servers can completely bypass all permissions based checks.
 360          * This prevents desyncs when one server has different type/class tags to another.
 361          * That having been said, this does open things up to the possibility of source changes
 362          * allowing remote kills, etc - but if they have access to the src, they most likely have
 363          * access to the conf - so it's an end to a means either way.
 364          */
 365         if (!IS_LOCAL(this))
 366                 return true;
 367
 368         // are they even an oper at all?
 369         if (*this->oper)
 370         {
 371                 opertype_t::iterator iter_opertype = opertypes.find(this->oper);
 372                 if (iter_opertype != opertypes.end())
 373                 {
 374                         char* Classes = strdup(iter_opertype->second);
 375                         char* myclass = strtok_r(Classes," ",&savept);
 376                         while (myclass)
 377                         {
 378                                 operclass_t::iterator iter_operclass = operclass.find(myclass);
 379                                 if (iter_operclass != operclass.end())
 380                                 {
 381                                         char* CommandList = strdup(iter_operclass->second);
 382                                         mycmd = strtok_r(CommandList," ",&savept2);
 383                                         while (mycmd)
 384                                         {
 385                                                 if ((!strcasecmp(mycmd,command.c_str())) || (*mycmd == '*'))
 386                                                 {
 387                                                         free(Classes);
 388                                                         free(CommandList);
 389                                                         return true;
 390                                                 }
 391                                                 mycmd = strtok_r(NULL," ",&savept2);
 392                                         }
 393                                         free(CommandList);
 394                                 }
 395                                 myclass = strtok_r(NULL," ",&savept);
 396                         }
 397                         free(Classes);
 398                 }
 399         }
 400         return false;
 401 }
 402
 403
 404 bool userrec::AddBuffer(const std::string &a)
 405 {
 406         std::string b = "";
 407         char* n = (char*)a.c_str();
 408
 409         for (char* i = n; *i; i++)
 410         {
 411                 if ((*i != '\r') && (*i != '\0') && (*i != 7))
 412                         b = b + *i;
 413         }
 414
 415         recvq.append(b);
 416         unsigned int i = 0;
 417
 418         // count the size of the first line in the buffer.
 419         while (i < recvq.length())
 420         {
 421                 if (recvq[i++] == '\n')
 422                         break;
 423         }
 424         if (recvq.length() > (unsigned)this->recvqmax)
 425         {
 426                 this->SetWriteError("RecvQ exceeded");
 427                 WriteOpers("*** User %s RecvQ of %d exceeds connect class maximum of %d",this->nick,recvq.length(),this->recvqmax);
 428         }
 429
 430         /*
 431          * return false if we've had more than 600 characters WITHOUT
 432          * a carriage return (this is BAD, drop the socket)
 433          */
 434         return (i < 600);
 435 }
 436
 437 bool userrec::BufferIsReady()
 438 {
 439         unsigned int t = recvq.length();
 440
 441         for (unsigned int i = 0; i < t; i++)
 442                 if (recvq[i] == '\n')
 443                         return true;
 444         return false;
 445 }
 446
 447 void userrec::ClearBuffer()
 448 {
 449         recvq = "";
 450 }
 451
 452 std::string userrec::GetBuffer()
 453 {
 454         if (recvq == "")
 455                 return "";
 456
 457         char* line = (char*)recvq.c_str();
 458
 459         std::string ret = "";
 460
 461         while ((*line != '\n') && (*line))
 462         {
 463                 ret = ret + *line;
 464                 line++;
 465         }
 466
 467         while ((*line == '\n') || (*line == '\r'))
 468                 line++;
 469
 470         recvq = line;
 471
 472         return ret;
 473 }
 474
 475 void userrec::AddWriteBuf(const std::string &data)
 476 {
 477         if (*this->GetWriteError())
 478                 return;
 479
 480         if (sendq.length() + data.length() > (unsigned)this->sendqmax)
 481         {
 482                 /*
 483                  * Fix by brain - Set the error text BEFORE calling writeopers, because
 484                  * if we dont it'll recursively  call here over and over again trying
 485                  * to repeatedly add the text to the sendq!
 486                  */
 487                 this->SetWriteError("SendQ exceeded");
 488                 WriteOpers("*** User %s SendQ of %d exceeds connect class maximum of %d",this->nick,sendq.length() + data.length(),this->sendqmax);
 489                 return;
 490         }
 491
 492         sendq.append(data);
 493 }
 494
 495 // send AS MUCH OF THE USERS SENDQ as we are able to (might not be all of it)
 496 void userrec::FlushWriteBuf()
 497 {
 498         if ((sendq.length()) && (this->fd != FD_MAGIC_NUMBER))
 499         {
 500                 char* tb = (char*)this->sendq.c_str();
 501                 int n_sent = write(this->fd,tb,this->sendq.length());
 502                 if (n_sent == -1)
 503                 {
 504                         if (errno != EAGAIN)
 505                                 this->SetWriteError(strerror(errno));
 506                 }
 507                 else
 508                 {
 509                         // advance the queue
 510                         tb += n_sent;
 511                         this->sendq = tb;
 512                         // update the user's stats counters
 513                         this->bytes_out += n_sent;
 514                         this->cmds_out++;
 515                 }
 516         }
 517 }
 518
 519 void userrec::SetWriteError(const std::string &error)
 520 {
 521         log(DEBUG,"Setting error string for %s to '%s'",this->nick,error.c_str());
 522         // don't try to set the error twice, its already set take the first string.
 523         if (this->WriteError == "")
 524                 this->WriteError = error;
 525 }
 526
 527 const char* userrec::GetWriteError()
 528 {
 529         return this->WriteError.c_str();
 530 }
 531
 532 void AddOper(userrec* user)
 533 {
 534         log(DEBUG,"Oper added to optimization list");
 535         all_opers.push_back(user);
 536 }
 537
 538 void DeleteOper(userrec* user)
 539 {
 540         for (std::vector<userrec*>::iterator a = all_opers.begin(); a < all_opers.end(); a++)
 541         {
 542                 if (*a == user)
 543                 {
 544                         log(DEBUG,"Oper removed from optimization list");
 545                         all_opers.erase(a);
 546                         return;
 547                 }
 548         }
 549 }
 550
 551 void kill_link(userrec *user,const char* r)
 552 {
 553         user_hash::iterator iter = clientlist.find(user->nick);
 554
 555 /*
 556  * I'm pretty sure returning here is causing a desync when part of the net thinks a user is gone,
 557  * and another part doesn't. We want to broadcast the quit/kill before bailing so the net stays in sync.
 558  *
 559  * I can't imagine this blowing up, so I'm commenting it out. We still check
 560  * before playing with a bad iterator below in our if(). DISCUSS THIS BEFORE YOU DO ANYTHING. --w00t
 561  *
 562  *      if (iter == clientlist.end())
 563  *              return;
 564  */
 565
 566         char reason[MAXBUF];
 567
 568         strlcpy(reason,r,MAXQUIT-1);
 569         log(DEBUG,"kill_link: %s %d '%s'",user->nick,user->fd,reason);
 570
 571         if (IS_LOCAL(user))
 572                 Write(user->fd,"ERROR :Closing link (%s@%s) [%s]",user->ident,user->host,reason);
 573
 574         if (user->registered == 7)
 575         {
 576                 purge_empty_chans(user);
 577                 FOREACH_MOD(I_OnUserQuit,OnUserQuit(user,reason));
 578                 WriteCommonExcept(user,"QUIT :%s",reason);
 579         }
 580
 581         if (IS_LOCAL(user))
 582                 user->FlushWriteBuf();
 583
 584         FOREACH_MOD(I_OnUserDisconnect,OnUserDisconnect(user));
 585
 586         if (IS_LOCAL(user))
 587         {
 588                 if (Config->GetIOHook(user->port))
 589                 {
 590                         try
 591                         {
 592                                 Config->GetIOHook(user->port)->OnRawSocketClose(user->fd);
 593                         }
 594                         catch (ModuleException& modexcept)
 595                         {
 596                                 log(DEBUG,"Module exception cought: %s",modexcept.GetReason());
 597                         }
 598                 }
 599
 600                 ServerInstance->SE->DelFd(user->fd);
 601                 user->CloseSocket();
 602         }
 603
 604         /*
 605          * this must come before the WriteOpers so that it doesnt try to fill their buffer with anything
 606          * if they were an oper with +s.
 607          *
 608          * XXX -
 609          * In the current implementation, we only show local quits, as we only show local connects. With
 610          * the proposed implmentation of snomasks however, this will likely change in the (near?) future.
 611          */
 612         if (user->registered == 7)
 613         {
 614                 if (IS_LOCAL(user))
 615                         WriteOpers("*** Client exiting: %s!%s@%s [%s]",user->nick,user->ident,user->host,reason);
 616                 AddWhoWas(user);
 617         }
 618
 619         if (iter != clientlist.end())
 620         {
 621                 log(DEBUG,"deleting user hash value %lx",(unsigned long)user);
 622                 if (IS_LOCAL(user))
 623                 {
 624                         fd_ref_table[user->fd] = NULL;
 625                         if (find(local_users.begin(),local_users.end(),user) != local_users.end())
 626                         {
 627                                 local_users.erase(find(local_users.begin(),local_users.end(),user));
 628                                 log(DEBUG,"Delete local user");
 629                         }
 630                 }
 631                 clientlist.erase(iter);
 632                 DELETE(user);
 633         }
 634 }
 635
 636 WhoWasGroup::WhoWasGroup(userrec* user) : host(NULL), dhost(NULL), ident(NULL), server(NULL), gecos(NULL), signon(user->signon)
 637 {
 638         this->host = strdup(user->host);
 639         this->dhost = strdup(user->dhost);
 640         this->ident = strdup(user->ident);
 641         this->server = user->server;
 642         this->gecos = strdup(user->fullname);
 643 }
 644
 645 WhoWasGroup::~WhoWasGroup()
 646 {
 647         if (host)
 648                 free(host);
 649         if (dhost)
 650                 free(dhost);
 651         if (ident)
 652                 free(ident);
 653         if (gecos)
 654                 free(gecos);
 655 }
 656
 657 /* adds or updates an entry in the whowas list */
 658 void AddWhoWas(userrec* u)
 659 {
 660         whowas_users::iterator iter = whowas.find(u->nick);
 661
 662         if (iter == whowas.end())
 663         {
 664                 whowas_set* n = new whowas_set;
 665                 WhoWasGroup *a = new WhoWasGroup(u);
 666                 n->push_back(a);
 667                 whowas[u->nick] = n;
 668         }
 669         else
 670         {
 671                 whowas_set* group = (whowas_set*)iter->second;
 672
 673                 if (group->size() > 10)
 674                 {
 675                         WhoWasGroup *a = (WhoWasGroup*)*(group->begin());
 676                         DELETE(a);
 677                         group->pop_front();
 678                 }
 679
 680                 WhoWasGroup *a = new WhoWasGroup(u);
 681                 group->push_back(a);
 682         }
 683 }
 684
 685 /* every hour, run this function which removes all entries over 3 days */
 686 void MaintainWhoWas(time_t TIME)
 687 {
 688         for (whowas_users::iterator iter = whowas.begin(); iter != whowas.end(); iter++)
 689         {
 690                 whowas_set* n = (whowas_set*)iter->second;
 691                 if (n->size())
 692                 {
 693                         while ((n->begin() != n->end()) && ((*n->begin())->signon < TIME - 259200)) // 3 days
 694                         {
 695                                 WhoWasGroup *a = *(n->begin());
 696                                 DELETE(a);
 697                                 n->erase(n->begin());
 698                         }
 699                 }
 700         }
 701 }
 702
 703 /* add a client connection to the sockets list */
 704 void AddClient(int socket, int port, bool iscached, in_addr ip4)
 705 {
 706         std::string tempnick = ConvToStr(socket) + "-unknown";
 707         user_hash::iterator iter = clientlist.find(tempnick);
 708         const char *ipaddr = inet_ntoa(ip4);
 709         int j = 0;
 710
 711         /*
 712          * fix by brain.
 713          * as these nicknames are 'RFC impossible', we can be sure nobody is going to be
 714          * using one as a registered connection. As they are per fd, we can also safely assume
 715          * that we wont have collisions. Therefore, if the nick exists in the list, its only
 716          * used by a dead socket, erase the iterator so that the new client may reclaim it.
 717          * this was probably the cause of 'server ignores me when i hammer it with reconnects'
 718          * issue in earlier alphas/betas
 719          */
 720         if (iter != clientlist.end())
 721         {
 722                 userrec* goner = iter->second;
 723                 DELETE(goner);
 724                 clientlist.erase(iter);
 725         }
 726
 727         log(DEBUG,"AddClient: %d %d %s",socket,port,ipaddr);
 728
 729         clientlist[tempnick] = new userrec();
 730         clientlist[tempnick]->fd = socket;
 731         strlcpy(clientlist[tempnick]->nick,tempnick.c_str(),NICKMAX-1);
 732
 733         /* Smarter than your average bear^H^H^H^Hset of strlcpys. */
 734         for (char* temp = (char*)ipaddr; *temp && j < 64; temp++, j++)
 735                 clientlist[tempnick]->dhost[j] = clientlist[tempnick]->host[j] = *temp;
 736         clientlist[tempnick]->dhost[j] = clientlist[tempnick]->host[j] = 0;
 737
 738         clientlist[tempnick]->server = (char*)FindServerNamePtr(Config->ServerName);
 739         /* We don't need range checking here, we KNOW 'unknown\0' will fit into the ident field. */
 740         strcpy(clientlist[tempnick]->ident, "unknown");
 741
 742         clientlist[tempnick]->registered = 0;
 743         clientlist[tempnick]->signon = TIME + Config->dns_timeout;
 744         clientlist[tempnick]->lastping = 1;
 745         clientlist[tempnick]->ip4 = ip4;
 746         clientlist[tempnick]->port = port;
 747
 748         // set the registration timeout for this user
 749         unsigned long class_regtimeout = 90;
 750         int class_flood = 0;
 751         long class_threshold = 5;
 752         long class_sqmax = 262144;      // 256kb
 753         long class_rqmax = 4096;        // 4k
 754
 755         for (ClassVector::iterator i = Config->Classes.begin(); i != Config->Classes.end(); i++)
 756         {
 757                 if ((i->type == CC_ALLOW) && (match(ipaddr,i->host.c_str())))
 758                 {
 759                         class_regtimeout = (unsigned long)i->registration_timeout;
 760                         class_flood = i->flood;
 761                         clientlist[tempnick]->pingmax = i->pingtime;
 762                         class_threshold = i->threshold;
 763                         class_sqmax = i->sendqmax;
 764                         class_rqmax = i->recvqmax;
 765                         break;
 766                 }
 767         }
 768
 769         clientlist[tempnick]->nping = TIME+clientlist[tempnick]->pingmax + Config->dns_timeout;
 770         clientlist[tempnick]->timeout = TIME+class_regtimeout;
 771         clientlist[tempnick]->flood = class_flood;
 772         clientlist[tempnick]->threshold = class_threshold;
 773         clientlist[tempnick]->sendqmax = class_sqmax;
 774         clientlist[tempnick]->recvqmax = class_rqmax;
 775
 776         fd_ref_table[socket] = clientlist[tempnick];
 777         local_users.push_back(clientlist[tempnick]);
 778
 779         if (local_users.size() > Config->SoftLimit)
 780         {
 781                 kill_link(clientlist[tempnick],"No more connections allowed");
 782                 return;
 783         }
 784
 785         if (local_users.size() >= MAXCLIENTS)
 786         {
 787                 kill_link(clientlist[tempnick],"No more connections allowed");
 788                 return;
 789         }
 790
 791         /*
 792          * XXX -
 793          * this is done as a safety check to keep the file descriptors within range of fd_ref_table.
 794          * its a pretty big but for the moment valid assumption:
 795          * file descriptors are handed out starting at 0, and are recycled as theyre freed.
 796          * therefore if there is ever an fd over 65535, 65536 clients must be connected to the
 797          * irc server at once (or the irc server otherwise initiating this many connections, files etc)
 798          * which for the time being is a physical impossibility (even the largest networks dont have more
 799          * than about 10,000 users on ONE server!)
 800          */
 801         if ((unsigned)socket >= MAX_DESCRIPTORS)
 802         {
 803                 kill_link(clientlist[tempnick],"Server is full");
 804                 return;
 805         }
 806         char* e = matches_exception(ipaddr);
 807         if (!e)
 808         {
 809                 char* r = matches_zline(ipaddr);
 810                 if (r)
 811                 {
 812                         char reason[MAXBUF];
 813                         snprintf(reason,MAXBUF,"Z-Lined: %s",r);
 814                         kill_link(clientlist[tempnick],reason);
 815                         return;
 816                 }
 817         }
 818
 819         if (socket > -1)
 820         {
 821                 ServerInstance->SE->AddFd(socket,true,X_ESTAB_CLIENT);
 822         }
 823
 824         WriteServ(clientlist[tempnick]->fd,"NOTICE Auth :*** Looking up your hostname...");
 825 }
 826
 827 long FindMatchingGlobal(userrec* user)
 828 {
 829         long x = 0;
 830         for (user_hash::const_iterator a = clientlist.begin(); a != clientlist.end(); a++)
 831         {
 832                 if (a->second->ip4.s_addr == user->ip4.s_addr)
 833                         x++;
 834         }
 835         return x;
 836 }
 837
 838 long FindMatchingLocal(userrec* user)
 839 {
 840         long x = 0;
 841         for (std::vector<userrec*>::const_iterator a = local_users.begin(); a != local_users.end(); a++)
 842         {
 843                 userrec* comp = (userrec*)(*a);
 844                 if (comp->ip4.s_addr == user->ip4.s_addr)
 845                         x++;
 846         }
 847         return x;
 848 }
 849
 850 void FullConnectUser(userrec* user, CullList* Goners)
 851 {
 852         ServerInstance->stats->statsConnects++;
 853         user->idle_lastmsg = TIME;
 854         log(DEBUG,"ConnectUser: %s",user->nick);
 855
 856         ConnectClass a = GetClass(user);
 857
 858         if (a.type == CC_DENY)
 859         {
 860                 Goners->AddItem(user,"Unauthorised connection");
 861                 return;
 862         }
 863
 864         if ((*(a.pass.c_str())) && (!user->haspassed))
 865         {
 866                 Goners->AddItem(user,"Invalid password");
 867                 return;
 868         }
 869
 870         if (FindMatchingLocal(user) > a.maxlocal)
 871         {
 872                 Goners->AddItem(user,"No more connections allowed from your host via this connect class (local)");
 873                 WriteOpers("*** WARNING: maximum LOCAL connections (%ld) exceeded for IP %s",a.maxlocal,(char*)inet_ntoa(user->ip4));
 874                 return;
 875         }
 876         else if (FindMatchingGlobal(user) > a.maxglobal)
 877         {
 878                 Goners->AddItem(user,"No more connections allowed from your host via this connect class (global)");
 879                 WriteOpers("*** WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s",a.maxglobal,(char*)inet_ntoa(user->ip4));
 880                 return;
 881         }
 882
 883         char match_against[MAXBUF];
 884         snprintf(match_against,MAXBUF,"%s@%s",user->ident,user->host);
 885         char* e = matches_exception(match_against);
 886
 887         if (!e)
 888         {
 889                 char* r = matches_gline(match_against);
 890
 891                 if (r)
 892                 {
 893                         char reason[MAXBUF];
 894                         snprintf(reason,MAXBUF,"G-Lined: %s",r);
 895                         Goners->AddItem(user,reason);
 896                         return;
 897                 }
 898
 899                 r = matches_kline(match_against);
 900
 901                 if (r)
 902                 {
 903                         char reason[MAXBUF];
 904                         snprintf(reason,MAXBUF,"K-Lined: %s",r);
 905                         Goners->AddItem(user,reason);
 906                         return;
 907                 }
 908         }
 909
 910
 911         WriteServ(user->fd,"NOTICE Auth :Welcome to \002%s\002!",Config->Network);
 912         WriteServ(user->fd,"001 %s :Welcome to the %s IRC Network %s!%s@%s",user->nick,Config->Network,user->nick,user->ident,user->host);
 913         WriteServ(user->fd,"002 %s :Your host is %s, running version %s",user->nick,Config->ServerName,VERSION);
 914         WriteServ(user->fd,"003 %s :This server was created %s %s",user->nick,__TIME__,__DATE__);
 915         WriteServ(user->fd,"004 %s %s %s iowghrasxRVSCWBG lvhopsmntikrcaqbegIOLQRSKVHGCNT vhobeIaqglk",user->nick,Config->ServerName,VERSION);
 916
 917         // anfl @ #ratbox, efnet reminded me that according to the RFC this cant contain more than 13 tokens per line...
 918         // so i'd better split it :)
 919         std::stringstream out(Config->data005);
 920         std::string token = "";
 921         std::string line5 = "";
 922         int token_counter = 0;
 923
 924         while (!out.eof())
 925         {
 926                 out >> token;
 927                 line5 = line5 + token + " ";
 928                 token_counter++;
 929
 930                 if ((token_counter >= 13) || (out.eof() == true))
 931                 {
 932                         WriteServ(user->fd,"005 %s %s:are supported by this server",user->nick,line5.c_str());
 933                         line5 = "";
 934                         token_counter = 0;
 935                 }
 936         }
 937
 938         ShowMOTD(user);
 939
 940         /*
 941          * fix 3 by brain, move registered = 7 below these so that spurious modes and host
 942          * changes dont go out onto the network and produce 'fake direction'.
 943          */
 944         FOREACH_MOD(I_OnUserConnect,OnUserConnect(user));
 945         FOREACH_MOD(I_OnGlobalConnect,OnGlobalConnect(user));
 946         user->registered = 7;
 947         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));
 948 }
 949
 950 /** ReHashNick()
 951  * re-allocates a nick in the user_hash after they change nicknames,
 952  * returns a pointer to the new user as it may have moved
 953  */
 954 userrec* ReHashNick(char* Old, char* New)
 955 {
 956         //user_hash::iterator newnick;
 957         user_hash::iterator oldnick = clientlist.find(Old);
 958
 959         log(DEBUG,"ReHashNick: %s %s",Old,New);
 960
 961         if (!strcasecmp(Old,New))
 962         {
 963                 log(DEBUG,"old nick is new nick, skipping");
 964                 return oldnick->second;
 965         }
 966
 967         if (oldnick == clientlist.end())
 968                 return NULL; /* doesnt exist */
 969
 970         log(DEBUG,"ReHashNick: Found hashed nick %s",Old);
 971
 972         userrec* olduser = oldnick->second;
 973         clientlist[New] = olduser;
 974         clientlist.erase(oldnick);
 975
 976         log(DEBUG,"ReHashNick: Nick rehashed as %s",New);
 977
 978         return clientlist[New];
 979 }
 980
 981 void force_nickchange(userrec* user,const char* newnick)
 982 {
 983         char nick[MAXBUF];
 984         int MOD_RESULT = 0;
 985
 986         *nick = 0;
 987
 988         FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(user,newnick));
 989
 990         if (MOD_RESULT)
 991         {
 992                 ServerInstance->stats->statsCollisions++;
 993                 kill_link(user,"Nickname collision");
 994                 return;
 995         }
 996
 997         if (matches_qline(newnick))
 998         {
 999                 ServerInstance->stats->statsCollisions++;
1000                 kill_link(user,"Nickname collision");
1001                 return;
1002         }
1003
1004         if (user)
1005         {
1006                 if (newnick)
1007                 {
1008                         strlcpy(nick,newnick,MAXBUF-1);
1009                 }
1010
1011                 if (user->registered == 7)
1012                 {
1013                         char* pars[1];
1014
1015                         pars[0] = nick;
1016                         std::string cmd = "NICK";
1017                         ServerInstance->Parser->CallHandler(cmd,pars,1,user);
1018                 }
1019         }
1020 }