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 #ifdef THREADED_DNS
 223         if ((IS_LOCAL(this)) && (!dns_done) && (registered >= 3))
 224         {
 225                 pthread_kill(this->dnsthread, SIGTERM);
 226         }
 227 #endif
 228 }
 229
 230 /* XXX - minor point, other *Host functions return a char *, this one creates it. Might be nice to be consistant? */
 231 void userrec::MakeHost(char* nhost)
 232 {
 233         /* This is much faster than snprintf */
 234         char* t = nhost;
 235         for(char* n = ident; *n; n++)
 236                 *t++ = *n;
 237         *t++ = '@';
 238         for(char* n = host; *n; n++)
 239                 *t++ = *n;
 240         *t = 0;
 241 }
 242
 243 void userrec::CloseSocket()
 244 {
 245         shutdown(this->fd,2);
 246         close(this->fd);
 247 }
 248
 249 char* userrec::GetFullHost()
 250 {
 251         static char result[MAXBUF];
 252         char* t = result;
 253         for(char* n = nick; *n; n++)
 254                 *t++ = *n;
 255         *t++ = '!';
 256         for(char* n = ident; *n; n++)
 257                 *t++ = *n;
 258         *t++ = '@';
 259         for(char* n = dhost; *n; n++)
 260                 *t++ = *n;
 261         *t = 0;
 262         return result;
 263 }
 264
 265 char* userrec::MakeWildHost()
 266 {
 267         static char nresult[MAXBUF];
 268         char* t = nresult;
 269         *t++ = '*';     *t++ = '!';
 270         *t++ = '*';     *t++ = '@';
 271         for(char* n = dhost; *n; n++)
 272                 *t++ = *n;
 273         *t = 0;
 274         return nresult;
 275 }
 276
 277 int userrec::ReadData(void* buffer, size_t size)
 278 {
 279         if (this->fd > -1)
 280         {
 281                 return read(this->fd, buffer, size);
 282         }
 283         else
 284                 return 0;
 285 }
 286
 287
 288 char* userrec::GetFullRealHost()
 289 {
 290         static char fresult[MAXBUF];
 291         char* t = fresult;
 292         for(char* n = nick; *n; n++)
 293                 *t++ = *n;
 294         *t++ = '!';
 295         for(char* n = ident; *n; n++)
 296                 *t++ = *n;
 297         *t++ = '@';
 298         for(char* n = host; *n; n++)
 299                 *t++ = *n;
 300         *t = 0;
 301         return fresult;
 302 }
 303
 304 bool userrec::IsInvited(irc::string &channel)
 305 {
 306         for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 307         {
 308                 irc::string compare = i->channel;
 309
 310                 if (compare == channel)
 311                 {
 312                         return true;
 313                 }
 314         }
 315         return false;
 316 }
 317
 318 InvitedList* userrec::GetInviteList()
 319 {
 320         return &invites;
 321 }
 322
 323 void userrec::InviteTo(irc::string &channel)
 324 {
 325         Invited i;
 326         i.channel = channel;
 327         invites.push_back(i);
 328 }
 329
 330 void userrec::RemoveInvite(irc::string &channel)
 331 {
 332         log(DEBUG,"Removing invites");
 333
 334         if (invites.size())
 335         {
 336                 for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 337                 {
 338                         irc::string compare = i->channel;
 339
 340                         if (compare == channel)
 341                         {
 342                                 invites.erase(i);
 343                                 return;
 344                         }
 345                 }
 346         }
 347 }
 348
 349 bool userrec::HasPermission(const std::string &command)
 350 {
 351         char* mycmd;
 352         char* savept;
 353         char* savept2;
 354
 355         /*
 356          * users on remote servers can completely bypass all permissions based checks.
 357          * This prevents desyncs when one server has different type/class tags to another.
 358          * That having been said, this does open things up to the possibility of source changes
 359          * allowing remote kills, etc - but if they have access to the src, they most likely have
 360          * access to the conf - so it's an end to a means either way.
 361          */
 362         if (!IS_LOCAL(this))
 363                 return true;
 364
 365         // are they even an oper at all?
 366         if (*this->oper)
 367         {
 368                 opertype_t::iterator iter_opertype = opertypes.find(this->oper);
 369                 if (iter_opertype != opertypes.end())
 370                 {
 371                         char* Classes = strdup(iter_opertype->second);
 372                         char* myclass = strtok_r(Classes," ",&savept);
 373                         while (myclass)
 374                         {
 375                                 operclass_t::iterator iter_operclass = operclass.find(myclass);
 376                                 if (iter_operclass != operclass.end())
 377                                 {
 378                                         char* CommandList = strdup(iter_operclass->second);
 379                                         mycmd = strtok_r(CommandList," ",&savept2);
 380                                         while (mycmd)
 381                                         {
 382                                                 if ((!strcasecmp(mycmd,command.c_str())) || (*mycmd == '*'))
 383                                                 {
 384                                                         free(Classes);
 385                                                         free(CommandList);
 386                                                         return true;
 387                                                 }
 388                                                 mycmd = strtok_r(NULL," ",&savept2);
 389                                         }
 390                                         free(CommandList);
 391                                 }
 392                                 myclass = strtok_r(NULL," ",&savept);
 393                         }
 394                         free(Classes);
 395                 }
 396         }
 397         return false;
 398 }
 399
 400
 401 bool userrec::AddBuffer(const std::string &a)
 402 {
 403         std::string b = "";
 404
 405         /* NB: std::string is arsey about \r and \n and tries to translate them
 406          * somehow, so we CANNOT use std::string::find() here :(
 407          */
 408         for (std::string::const_iterator i = a.begin(); i != a.end(); i++)
 409         {
 410                 if (*i != '\r')
 411                         b += *i;
 412         }
 413
 414         if (b.length())
 415                 recvq.append(b);
 416
 417         if (recvq.length() > (unsigned)this->recvqmax)
 418         {
 419                 this->SetWriteError("RecvQ exceeded");
 420                 WriteOpers("*** User %s RecvQ of %d exceeds connect class maximum of %d",this->nick,recvq.length(),this->recvqmax);
 421                 return false;
 422         }
 423
 424         return true;
 425 }
 426
 427 bool userrec::BufferIsReady()
 428 {
 429         return (recvq.find('\n') != std::string::npos);
 430 }
 431
 432 void userrec::ClearBuffer()
 433 {
 434         recvq = "";
 435 }
 436
 437 std::string userrec::GetBuffer()
 438 {
 439         if (!recvq.length())
 440                 return "";
 441
 442         /* Strip any leading \r or \n off the string.
 443          * Usually there are only one or two of these,
 444          * so its is computationally cheap to do.
 445          */
 446         while ((*recvq.begin() == '\r') || (*recvq.begin() == '\n'))
 447                 recvq.erase(recvq.begin());
 448
 449         for (std::string::iterator x = recvq.begin(); x != recvq.end(); x++)
 450         {
 451                 /* Find the first complete line, return it as the
 452                  * result, and leave the recvq as whats left
 453                  */
 454                 if (*x == '\n')
 455                 {
 456                         std::string ret = std::string(recvq.begin(), x);
 457                         recvq.erase(recvq.begin(), x + 1);
 458                         return ret;
 459                 }
 460         }
 461         return "";
 462 }
 463
 464 void userrec::AddWriteBuf(const std::string &data)
 465 {
 466         if (*this->GetWriteError())
 467                 return;
 468
 469         if (sendq.length() + data.length() > (unsigned)this->sendqmax)
 470         {
 471                 /*
 472                  * Fix by brain - Set the error text BEFORE calling writeopers, because
 473                  * if we dont it'll recursively  call here over and over again trying
 474                  * to repeatedly add the text to the sendq!
 475                  */
 476                 this->SetWriteError("SendQ exceeded");
 477                 WriteOpers("*** User %s SendQ of %d exceeds connect class maximum of %d",this->nick,sendq.length() + data.length(),this->sendqmax);
 478                 return;
 479         }
 480
 481         if (data.length() > 512)
 482         {
 483                 std::string newdata(data);
 484                 newdata.resize(510);
 485                 newdata.append("\r\n");
 486                 sendq.append(newdata);
 487         }
 488         else
 489         {
 490                 sendq.append(data);
 491         }
 492 }
 493
 494 // send AS MUCH OF THE USERS SENDQ as we are able to (might not be all of it)
 495 void userrec::FlushWriteBuf()
 496 {
 497         if ((sendq.length()) && (this->fd != FD_MAGIC_NUMBER))
 498         {
 499                 const char* tb = this->sendq.c_str();
 500                 int n_sent = write(this->fd,tb,this->sendq.length());
 501                 if (n_sent == -1)
 502                 {
 503                         if (errno != EAGAIN)
 504                                 this->SetWriteError(strerror(errno));
 505                 }
 506                 else
 507                 {
 508                         // advance the queue
 509                         tb += n_sent;
 510                         this->sendq = tb;
 511                         // update the user's stats counters
 512                         this->bytes_out += n_sent;
 513                         this->cmds_out++;
 514                 }
 515         }
 516 }
 517
 518 void userrec::SetWriteError(const std::string &error)
 519 {
 520         // don't try to set the error twice, its already set take the first string.
 521         if (!this->WriteError.length())
 522         {
 523                 log(DEBUG,"Setting error string for %s to '%s'",this->nick,error.c_str());
 524                 this->WriteError = error;
 525         }
 526 }
 527
 528 const char* userrec::GetWriteError()
 529 {
 530         return this->WriteError.c_str();
 531 }
 532
 533 void AddOper(userrec* user)
 534 {
 535         log(DEBUG,"Oper added to optimization list");
 536         all_opers.push_back(user);
 537 }
 538
 539 void DeleteOper(userrec* user)
 540 {
 541         for (std::vector<userrec*>::iterator a = all_opers.begin(); a < all_opers.end(); a++)
 542         {
 543                 if (*a == user)
 544                 {
 545                         log(DEBUG,"Oper removed from optimization list");
 546                         all_opers.erase(a);
 547                         return;
 548                 }
 549         }
 550 }
 551
 552 void kill_link(userrec *user,const char* r)
 553 {
 554         user_hash::iterator iter = clientlist.find(user->nick);
 555
 556 /*
 557  * I'm pretty sure returning here is causing a desync when part of the net thinks a user is gone,
 558  * and another part doesn't. We want to broadcast the quit/kill before bailing so the net stays in sync.
 559  *
 560  * I can't imagine this blowing up, so I'm commenting it out. We still check
 561  * before playing with a bad iterator below in our if(). DISCUSS THIS BEFORE YOU DO ANYTHING. --w00t
 562  *
 563  *      if (iter == clientlist.end())
 564  *              return;
 565  */
 566
 567         char reason[MAXBUF];
 568
 569         strlcpy(reason,r,MAXQUIT-1);
 570         log(DEBUG,"kill_link: %s %d '%s'",user->nick,user->fd,reason);
 571
 572         if (IS_LOCAL(user))
 573                 Write(user->fd,"ERROR :Closing link (%s@%s) [%s]",user->ident,user->host,reason);
 574
 575         if (user->registered == 7)
 576         {
 577                 purge_empty_chans(user);
 578                 FOREACH_MOD(I_OnUserQuit,OnUserQuit(user,reason));
 579                 WriteCommonExcept(user,"QUIT :%s",reason);
 580         }
 581
 582         if (IS_LOCAL(user))
 583                 user->FlushWriteBuf();
 584
 585         FOREACH_MOD(I_OnUserDisconnect,OnUserDisconnect(user));
 586
 587         if (IS_LOCAL(user))
 588         {
 589                 if (Config->GetIOHook(user->port))
 590                 {
 591                         try
 592                         {
 593                                 Config->GetIOHook(user->port)->OnRawSocketClose(user->fd);
 594                         }
 595                         catch (ModuleException& modexcept)
 596                         {
 597                                 log(DEBUG,"Module exception cought: %s",modexcept.GetReason());
 598                         }
 599                 }
 600
 601                 ServerInstance->SE->DelFd(user->fd);
 602                 user->CloseSocket();
 603         }
 604
 605         /*
 606          * this must come before the WriteOpers so that it doesnt try to fill their buffer with anything
 607          * if they were an oper with +s.
 608          *
 609          * XXX -
 610          * In the current implementation, we only show local quits, as we only show local connects. With
 611          * the proposed implmentation of snomasks however, this will likely change in the (near?) future.
 612          */
 613         if (user->registered == 7)
 614         {
 615                 if (IS_LOCAL(user))
 616                         WriteOpers("*** Client exiting: %s!%s@%s [%s]",user->nick,user->ident,user->host,reason);
 617                 AddWhoWas(user);
 618         }
 619
 620         if (iter != clientlist.end())
 621         {
 622                 log(DEBUG,"deleting user hash value %lx",(unsigned long)user);
 623                 if (IS_LOCAL(user))
 624                 {
 625                         fd_ref_table[user->fd] = NULL;
 626                         if (find(local_users.begin(),local_users.end(),user) != local_users.end())
 627                         {
 628                                 local_users.erase(find(local_users.begin(),local_users.end(),user));
 629                                 log(DEBUG,"Delete local user");
 630                         }
 631                 }
 632                 clientlist.erase(iter);
 633                 DELETE(user);
 634         }
 635 }
 636
 637 WhoWasGroup::WhoWasGroup(userrec* user) : host(NULL), dhost(NULL), ident(NULL), server(NULL), gecos(NULL), signon(user->signon)
 638 {
 639         this->host = strdup(user->host);
 640         this->dhost = strdup(user->dhost);
 641         this->ident = strdup(user->ident);
 642         this->server = user->server;
 643         this->gecos = strdup(user->fullname);
 644 }
 645
 646 WhoWasGroup::~WhoWasGroup()
 647 {
 648         if (host)
 649                 free(host);
 650         if (dhost)
 651                 free(dhost);
 652         if (ident)
 653                 free(ident);
 654         if (gecos)
 655                 free(gecos);
 656 }
 657
 658 /* adds or updates an entry in the whowas list */
 659 void AddWhoWas(userrec* u)
 660 {
 661         whowas_users::iterator iter = whowas.find(u->nick);
 662
 663         if (iter == whowas.end())
 664         {
 665                 whowas_set* n = new whowas_set;
 666                 WhoWasGroup *a = new WhoWasGroup(u);
 667                 n->push_back(a);
 668                 whowas[u->nick] = n;
 669         }
 670         else
 671         {
 672                 whowas_set* group = (whowas_set*)iter->second;
 673
 674                 if (group->size() > 10)
 675                 {
 676                         WhoWasGroup *a = (WhoWasGroup*)*(group->begin());
 677                         DELETE(a);
 678                         group->pop_front();
 679                 }
 680
 681                 WhoWasGroup *a = new WhoWasGroup(u);
 682                 group->push_back(a);
 683         }
 684 }
 685
 686 /* every hour, run this function which removes all entries over 3 days */
 687 void MaintainWhoWas(time_t TIME)
 688 {
 689         for (whowas_users::iterator iter = whowas.begin(); iter != whowas.end(); iter++)
 690         {
 691                 whowas_set* n = (whowas_set*)iter->second;
 692                 if (n->size())
 693                 {
 694                         while ((n->begin() != n->end()) && ((*n->begin())->signon < TIME - 259200)) // 3 days
 695                         {
 696                                 WhoWasGroup *a = *(n->begin());
 697                                 DELETE(a);
 698                                 n->erase(n->begin());
 699                         }
 700                 }
 701         }
 702 }
 703
 704 /* add a client connection to the sockets list */
 705 void AddClient(int socket, int port, bool iscached, in_addr ip4)
 706 {
 707         std::string tempnick = ConvToStr(socket) + "-unknown";
 708         user_hash::iterator iter = clientlist.find(tempnick);
 709         const char *ipaddr = inet_ntoa(ip4);
 710         userrec* _new;
 711         int j = 0;
 712
 713         /*
 714          * fix by brain.
 715          * as these nicknames are 'RFC impossible', we can be sure nobody is going to be
 716          * using one as a registered connection. As they are per fd, we can also safely assume
 717          * that we wont have collisions. Therefore, if the nick exists in the list, its only
 718          * used by a dead socket, erase the iterator so that the new client may reclaim it.
 719          * this was probably the cause of 'server ignores me when i hammer it with reconnects'
 720          * issue in earlier alphas/betas
 721          */
 722         if (iter != clientlist.end())
 723         {
 724                 userrec* goner = iter->second;
 725                 DELETE(goner);
 726                 clientlist.erase(iter);
 727         }
 728
 729         log(DEBUG,"AddClient: %d %d %s",socket,port,ipaddr);
 730
 731         _new = new userrec();
 732         clientlist[tempnick] = _new;
 733         _new->fd = socket;
 734         strlcpy(_new->nick,tempnick.c_str(),NICKMAX-1);
 735
 736         /* Smarter than your average bear^H^H^H^Hset of strlcpys. */
 737         for (const char* temp = ipaddr; *temp && j < 64; temp++, j++)
 738                 _new->dhost[j] = _new->host[j] = *temp;
 739         _new->dhost[j] = _new->host[j] = 0;
 740
 741         _new->server = FindServerNamePtr(Config->ServerName);
 742         /* We don't need range checking here, we KNOW 'unknown\0' will fit into the ident field. */
 743         strcpy(_new->ident, "unknown");
 744
 745         _new->registered = 0;
 746         _new->signon = TIME + Config->dns_timeout;
 747         _new->lastping = 1;
 748         _new->ip4 = ip4;
 749         _new->port = port;
 750
 751         // set the registration timeout for this user
 752         unsigned long class_regtimeout = 90;
 753         int class_flood = 0;
 754         long class_threshold = 5;
 755         long class_sqmax = 262144;      // 256kb
 756         long class_rqmax = 4096;        // 4k
 757
 758         for (ClassVector::iterator i = Config->Classes.begin(); i != Config->Classes.end(); i++)
 759         {
 760                 if ((i->type == CC_ALLOW) && (match(ipaddr,i->host.c_str())))
 761                 {
 762                         class_regtimeout = (unsigned long)i->registration_timeout;
 763                         class_flood = i->flood;
 764                         _new->pingmax = i->pingtime;
 765                         class_threshold = i->threshold;
 766                         class_sqmax = i->sendqmax;
 767                         class_rqmax = i->recvqmax;
 768                         break;
 769                 }
 770         }
 771
 772         _new->nping = TIME + _new->pingmax + Config->dns_timeout;
 773         _new->timeout = TIME+class_regtimeout;
 774         _new->flood = class_flood;
 775         _new->threshold = class_threshold;
 776         _new->sendqmax = class_sqmax;
 777         _new->recvqmax = class_rqmax;
 778
 779         fd_ref_table[socket] = _new;
 780         local_users.push_back(_new);
 781
 782         if (local_users.size() > Config->SoftLimit)
 783         {
 784                 kill_link(_new,"No more connections allowed");
 785                 return;
 786         }
 787
 788         if (local_users.size() >= MAXCLIENTS)
 789         {
 790                 kill_link(_new,"No more connections allowed");
 791                 return;
 792         }
 793
 794         /*
 795          * XXX -
 796          * this is done as a safety check to keep the file descriptors within range of fd_ref_table.
 797          * its a pretty big but for the moment valid assumption:
 798          * file descriptors are handed out starting at 0, and are recycled as theyre freed.
 799          * therefore if there is ever an fd over 65535, 65536 clients must be connected to the
 800          * irc server at once (or the irc server otherwise initiating this many connections, files etc)
 801          * which for the time being is a physical impossibility (even the largest networks dont have more
 802          * than about 10,000 users on ONE server!)
 803          */
 804         if ((unsigned)socket >= MAX_DESCRIPTORS)
 805         {
 806                 kill_link(_new,"Server is full");
 807                 return;
 808         }
 809         char* e = matches_exception(ipaddr);
 810         if (!e)
 811         {
 812                 char* r = matches_zline(ipaddr);
 813                 if (r)
 814                 {
 815                         char reason[MAXBUF];
 816                         snprintf(reason,MAXBUF,"Z-Lined: %s",r);
 817                         kill_link(_new,reason);
 818                         return;
 819                 }
 820         }
 821
 822         if (socket > -1)
 823         {
 824                 ServerInstance->SE->AddFd(socket,true,X_ESTAB_CLIENT);
 825         }
 826
 827         WriteServ(_new->fd,"NOTICE Auth :*** Looking up your hostname...");
 828 }
 829
 830 long FindMatchingGlobal(userrec* user)
 831 {
 832         long x = 0;
 833         for (user_hash::const_iterator a = clientlist.begin(); a != clientlist.end(); a++)
 834         {
 835                 if (a->second->ip4.s_addr == user->ip4.s_addr)
 836                         x++;
 837         }
 838         return x;
 839 }
 840
 841 long FindMatchingLocal(userrec* user)
 842 {
 843         long x = 0;
 844         for (std::vector<userrec*>::const_iterator a = local_users.begin(); a != local_users.end(); a++)
 845         {
 846                 userrec* comp = (userrec*)(*a);
 847                 if (comp->ip4.s_addr == user->ip4.s_addr)
 848                         x++;
 849         }
 850         return x;
 851 }
 852
 853 void FullConnectUser(userrec* user, CullList* Goners)
 854 {
 855         ServerInstance->stats->statsConnects++;
 856         user->idle_lastmsg = TIME;
 857         log(DEBUG,"ConnectUser: %s",user->nick);
 858
 859         ConnectClass a = GetClass(user);
 860
 861         if (a.type == CC_DENY)
 862         {
 863                 Goners->AddItem(user,"Unauthorised connection");
 864                 return;
 865         }
 866
 867         if ((*(a.pass.c_str())) && (!user->haspassed))
 868         {
 869                 Goners->AddItem(user,"Invalid password");
 870                 return;
 871         }
 872
 873         if (FindMatchingLocal(user) > a.maxlocal)
 874         {
 875                 Goners->AddItem(user,"No more connections allowed from your host via this connect class (local)");
 876                 WriteOpers("*** WARNING: maximum LOCAL connections (%ld) exceeded for IP %s",a.maxlocal,inet_ntoa(user->ip4));
 877                 return;
 878         }
 879         else if (FindMatchingGlobal(user) > a.maxglobal)
 880         {
 881                 Goners->AddItem(user,"No more connections allowed from your host via this connect class (global)");
 882                 WriteOpers("*** WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s",a.maxglobal,inet_ntoa(user->ip4));
 883                 return;
 884         }
 885
 886         char match_against[MAXBUF];
 887         snprintf(match_against,MAXBUF,"%s@%s",user->ident,user->host);
 888         char* e = matches_exception(match_against);
 889
 890         if (!e)
 891         {
 892                 char* r = matches_gline(match_against);
 893
 894                 if (r)
 895                 {
 896                         char reason[MAXBUF];
 897                         snprintf(reason,MAXBUF,"G-Lined: %s",r);
 898                         Goners->AddItem(user,reason);
 899                         return;
 900                 }
 901
 902                 r = matches_kline(match_against);
 903
 904                 if (r)
 905                 {
 906                         char reason[MAXBUF];
 907                         snprintf(reason,MAXBUF,"K-Lined: %s",r);
 908                         Goners->AddItem(user,reason);
 909                         return;
 910                 }
 911         }
 912
 913
 914         WriteServ(user->fd,"NOTICE Auth :Welcome to \002%s\002!",Config->Network);
 915         WriteServ(user->fd,"001 %s :Welcome to the %s IRC Network %s!%s@%s",user->nick,Config->Network,user->nick,user->ident,user->host);
 916         WriteServ(user->fd,"002 %s :Your host is %s, running version %s",user->nick,Config->ServerName,VERSION);
 917         WriteServ(user->fd,"003 %s :This server was created %s %s",user->nick,__TIME__,__DATE__);
 918         WriteServ(user->fd,"004 %s %s %s iowghrasxRVSCWBG lvhopsmntikrcaqbegIOLQRSKVHGCNT vhobeIaqglk",user->nick,Config->ServerName,VERSION);
 919
 920         // anfl @ #ratbox, efnet reminded me that according to the RFC this cant contain more than 13 tokens per line...
 921         // so i'd better split it :)
 922         std::stringstream out(Config->data005);
 923         std::string token = "";
 924         std::string line5 = "";
 925         int token_counter = 0;
 926
 927         while (!out.eof())
 928         {
 929                 out >> token;
 930                 line5 = line5 + token + " ";
 931                 token_counter++;
 932
 933                 if ((token_counter >= 13) || (out.eof() == true))
 934                 {
 935                         WriteServ(user->fd,"005 %s %s:are supported by this server",user->nick,line5.c_str());
 936                         line5 = "";
 937                         token_counter = 0;
 938                 }
 939         }
 940
 941         ShowMOTD(user);
 942
 943         /*
 944          * fix 3 by brain, move registered = 7 below these so that spurious modes and host
 945          * changes dont go out onto the network and produce 'fake direction'.
 946          */
 947         FOREACH_MOD(I_OnUserConnect,OnUserConnect(user));
 948         FOREACH_MOD(I_OnGlobalConnect,OnGlobalConnect(user));
 949         user->registered = 7;
 950         WriteOpers("*** Client connecting on port %lu: %s!%s@%s [%s]",(unsigned long)user->port,user->nick,user->ident,user->host,inet_ntoa(user->ip4));
 951 }
 952
 953 /** ReHashNick()
 954  * re-allocates a nick in the user_hash after they change nicknames,
 955  * returns a pointer to the new user as it may have moved
 956  */
 957 userrec* ReHashNick(const char* Old, const char* New)
 958 {
 959         //user_hash::iterator newnick;
 960         user_hash::iterator oldnick = clientlist.find(Old);
 961
 962         log(DEBUG,"ReHashNick: %s %s",Old,New);
 963
 964         if (!strcasecmp(Old,New))
 965         {
 966                 log(DEBUG,"old nick is new nick, skipping");
 967                 return oldnick->second;
 968         }
 969
 970         if (oldnick == clientlist.end())
 971                 return NULL; /* doesnt exist */
 972
 973         log(DEBUG,"ReHashNick: Found hashed nick %s",Old);
 974
 975         userrec* olduser = oldnick->second;
 976         clientlist[New] = olduser;
 977         clientlist.erase(oldnick);
 978
 979         log(DEBUG,"ReHashNick: Nick rehashed as %s",New);
 980
 981         return clientlist[New];
 982 }
 983
 984 void force_nickchange(userrec* user,const char* newnick)
 985 {
 986         char nick[MAXBUF];
 987         int MOD_RESULT = 0;
 988
 989         *nick = 0;
 990
 991         FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(user,newnick));
 992
 993         if (MOD_RESULT)
 994         {
 995                 ServerInstance->stats->statsCollisions++;
 996                 kill_link(user,"Nickname collision");
 997                 return;
 998         }
 999
1000         if (matches_qline(newnick))
1001         {
1002                 ServerInstance->stats->statsCollisions++;
1003                 kill_link(user,"Nickname collision");
1004                 return;
1005         }
1006
1007         if (user)
1008         {
1009                 if (newnick)
1010                 {
1011                         strlcpy(nick,newnick,MAXBUF-1);
1012                 }
1013
1014                 if (user->registered == 7)
1015                 {
1016                         const char* pars[1];
1017                         pars[0] = nick;
1018                         std::string cmd = "NICK";
1019
1020                         ServerInstance->Parser->CallHandler(cmd,pars,1,user);
1021                 }
1022         }
1023 }