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