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