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