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