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                         this->SetWriteError(strerror(errno));
 420                 }
 421                 else
 422                 {
 423                         // advance the queue
 424                         tb += n_sent;
 425                         this->sendq = tb;
 426                         // update the user's stats counters
 427                         this->bytes_out += n_sent;
 428                         this->cmds_out++;
 429                 }
 430         }
 431 }
 432
 433 void userrec::SetWriteError(const std::string &error)
 434 {
 435         log(DEBUG,"Setting error string for %s to '%s'",this->nick,error.c_str());
 436         // don't try to set the error twice, its already set take the first string.
 437         if (this->WriteError == "")
 438                 this->WriteError = error;
 439 }
 440
 441 const char* userrec::GetWriteError()
 442 {
 443         return this->WriteError.c_str();
 444 }
 445
 446 void AddOper(userrec* user)
 447 {
 448         log(DEBUG,"Oper added to optimization list");
 449         all_opers.push_back(user);
 450 }
 451
 452 void DeleteOper(userrec* user)
 453 {
 454         for (std::vector<userrec*>::iterator a = all_opers.begin(); a < all_opers.end(); a++)
 455         {
 456                 if (*a == user)
 457                 {
 458                         log(DEBUG,"Oper removed from optimization list");
 459                         all_opers.erase(a);
 460                         return;
 461                 }
 462         }
 463 }
 464
 465 void kill_link(userrec *user,const char* r)
 466 {
 467         user_hash::iterator iter = clientlist.find(user->nick);
 468
 469 /*
 470  * I'm pretty sure returning here is causing a desync when part of the net thinks a user is gone,
 471  * and another part doesn't. We want to broadcast the quit/kill before bailing so the net stays in sync.
 472  *
 473  * I can't imagine this blowing up, so I'm commenting it out. We still check
 474  * before playing with a bad iterator below in our if(). DISCUSS THIS BEFORE YOU DO ANYTHING. --w00t
 475  *
 476  *      if (iter == clientlist.end())
 477  *              return;
 478  */
 479
 480         char reason[MAXBUF];
 481
 482         strlcpy(reason,r,MAXQUIT-1);
 483         log(DEBUG,"kill_link: %s '%s'",user->nick,reason);
 484
 485         if (IS_LOCAL(user))
 486                 Write(user->fd,"ERROR :Closing link (%s@%s) [%s]",user->ident,user->host,reason);
 487
 488         if (user->registered == 7)
 489         {
 490                 purge_empty_chans(user);
 491                 FOREACH_MOD(I_OnUserQuit,OnUserQuit(user,reason));
 492                 WriteCommonExcept(user,"QUIT :%s",reason);
 493         }
 494
 495         if (IS_LOCAL(user))
 496                 user->FlushWriteBuf();
 497
 498         FOREACH_MOD(I_OnUserDisconnect,OnUserDisconnect(user));
 499
 500         if (IS_LOCAL(user))
 501         {
 502                 if (Config->GetIOHook(user->port))
 503                 {
 504                         try
 505                         {
 506                                 Config->GetIOHook(user->port)->OnRawSocketClose(user->fd);
 507                         }
 508                         catch (ModuleException& modexcept)
 509                         {
 510                                 log(DEBUG,"Module exception cought: %s",modexcept.GetReason());
 511                         }
 512                 }
 513
 514                 ServerInstance->SE->DelFd(user->fd);
 515                 user->CloseSocket();
 516         }
 517
 518         /*
 519          * this must come before the WriteOpers so that it doesnt try to fill their buffer with anything
 520          * if they were an oper with +s.
 521          *
 522          * XXX -
 523          * In the current implementation, we only show local quits, as we only show local connects. With
 524          * the proposed implmentation of snomasks however, this will likely change in the (near?) future.
 525          */
 526         if (user->registered == 7)
 527         {
 528                 if (IS_LOCAL(user))
 529                         WriteOpers("*** Client exiting: %s!%s@%s [%s]",user->nick,user->ident,user->host,reason);
 530                 AddWhoWas(user);
 531         }
 532
 533         if (iter != clientlist.end())
 534         {
 535                 log(DEBUG,"deleting user hash value %lx",(unsigned long)user);
 536                 if (IS_LOCAL(user))
 537                 {
 538                         fd_ref_table[user->fd] = NULL;
 539                         if (find(local_users.begin(),local_users.end(),user) != local_users.end())
 540                         {
 541                                 local_users.erase(find(local_users.begin(),local_users.end(),user));
 542                                 log(DEBUG,"Delete local user");
 543                         }
 544                 }
 545                 clientlist.erase(iter);
 546                 delete user;
 547         }
 548 }
 549
 550 WhoWasGroup::WhoWasGroup(userrec* user) : host(NULL), dhost(NULL), ident(NULL), server(NULL), gecos(NULL), signon(user->signon)
 551 {
 552         this->host = strdup(user->host);
 553         this->dhost = strdup(user->dhost);
 554         this->ident = strdup(user->ident);
 555         this->server = user->server;
 556         this->gecos = strdup(user->fullname);
 557 }
 558
 559 WhoWasGroup::~WhoWasGroup()
 560 {
 561         if (host)
 562                 free(host);
 563         if (dhost)
 564                 free(dhost);
 565         if (ident)
 566                 free(ident);
 567         if (gecos)
 568                 free(gecos);
 569 }
 570
 571 /* adds or updates an entry in the whowas list */
 572 void AddWhoWas(userrec* u)
 573 {
 574         whowas_users::iterator iter = whowas.find(u->nick);
 575
 576         if (iter == whowas.end())
 577         {
 578                 whowas_set* n = new whowas_set;
 579                 WhoWasGroup *a = new WhoWasGroup(u);
 580                 n->push_back(a);
 581                 whowas[u->nick] = n;
 582         }
 583         else
 584         {
 585                 whowas_set* group = (whowas_set*)iter->second;
 586
 587                 if (group->size() > 10)
 588                 {
 589                         WhoWasGroup *a = (WhoWasGroup*)*(group->begin());
 590                         delete a;
 591                         group->pop_front();
 592                 }
 593
 594                 WhoWasGroup *a = new WhoWasGroup(u);
 595                 group->push_back(a);
 596         }
 597 }
 598
 599 /* every hour, run this function which removes all entries over 3 days */
 600 void MaintainWhoWas(time_t TIME)
 601 {
 602         for (whowas_users::iterator iter = whowas.begin(); iter != whowas.end(); iter++)
 603         {
 604                 whowas_set* n = (whowas_set*)iter->second;
 605                 if (n->size())
 606                 {
 607                         while ((n->begin() != n->end()) && ((*n->begin())->signon < TIME - 259200)) // 3 days
 608                         {
 609                                 WhoWasGroup *a = *(n->begin());
 610                                 delete a;
 611                                 n->erase(n->begin());
 612                         }
 613                 }
 614         }
 615 }
 616
 617 /* add a client connection to the sockets list */
 618 void AddClient(int socket, int port, bool iscached, in_addr ip4)
 619 {
 620         std::string tempnick = ConvToStr(socket) + "-unknown";
 621         user_hash::iterator iter = clientlist.find(tempnick);
 622         const char *ipaddr = inet_ntoa(ip4);
 623         int j = 0;
 624
 625         /*
 626          * fix by brain.
 627          * as these nicknames are 'RFC impossible', we can be sure nobody is going to be
 628          * using one as a registered connection. As they are per fd, we can also safely assume
 629          * that we wont have collisions. Therefore, if the nick exists in the list, its only
 630          * used by a dead socket, erase the iterator so that the new client may reclaim it.
 631          * this was probably the cause of 'server ignores me when i hammer it with reconnects'
 632          * issue in earlier alphas/betas
 633          */
 634         if (iter != clientlist.end())
 635         {
 636                 userrec* goner = iter->second;
 637                 delete goner;
 638                 clientlist.erase(iter);
 639         }
 640
 641         log(DEBUG,"AddClient: %d %d %s",socket,port,ipaddr);
 642
 643         clientlist[tempnick] = new userrec();
 644         clientlist[tempnick]->fd = socket;
 645         strlcpy(clientlist[tempnick]->nick,tempnick.c_str(),NICKMAX-1);
 646
 647         /* Smarter than your average bear^H^H^H^Hset of strlcpys. */
 648         for (char* temp = (char*)ipaddr; *temp && j < 64; temp++, j++)
 649                 clientlist[tempnick]->dhost[j] = clientlist[tempnick]->host[j] = *temp;
 650         clientlist[tempnick]->dhost[j] = clientlist[tempnick]->host[j] = 0;
 651
 652         clientlist[tempnick]->server = (char*)FindServerNamePtr(Config->ServerName);
 653         /* We don't need range checking here, we KNOW 'unknown\0' will fit into the ident field. */
 654         strcpy(clientlist[tempnick]->ident, "unknown");
 655
 656         clientlist[tempnick]->registered = 0;
 657         clientlist[tempnick]->signon = TIME + Config->dns_timeout;
 658         clientlist[tempnick]->lastping = 1;
 659         clientlist[tempnick]->ip4 = ip4;
 660         clientlist[tempnick]->port = port;
 661
 662         // set the registration timeout for this user
 663         unsigned long class_regtimeout = 90;
 664         int class_flood = 0;
 665         long class_threshold = 5;
 666         long class_sqmax = 262144;      // 256kb
 667         long class_rqmax = 4096;        // 4k
 668
 669         for (ClassVector::iterator i = Config->Classes.begin(); i != Config->Classes.end(); i++)
 670         {
 671                 if ((i->type == CC_ALLOW) && (match(ipaddr,i->host.c_str())))
 672                 {
 673                         class_regtimeout = (unsigned long)i->registration_timeout;
 674                         class_flood = i->flood;
 675                         clientlist[tempnick]->pingmax = i->pingtime;
 676                         class_threshold = i->threshold;
 677                         class_sqmax = i->sendqmax;
 678                         class_rqmax = i->recvqmax;
 679                         break;
 680                 }
 681         }
 682
 683         clientlist[tempnick]->nping = TIME+clientlist[tempnick]->pingmax + Config->dns_timeout;
 684         clientlist[tempnick]->timeout = TIME+class_regtimeout;
 685         clientlist[tempnick]->flood = class_flood;
 686         clientlist[tempnick]->threshold = class_threshold;
 687         clientlist[tempnick]->sendqmax = class_sqmax;
 688         clientlist[tempnick]->recvqmax = class_rqmax;
 689
 690         fd_ref_table[socket] = clientlist[tempnick];
 691         local_users.push_back(clientlist[tempnick]);
 692
 693         if (local_users.size() > Config->SoftLimit)
 694         {
 695                 kill_link(clientlist[tempnick],"No more connections allowed");
 696                 return;
 697         }
 698
 699         if (local_users.size() >= MAXCLIENTS)
 700         {
 701                 kill_link(clientlist[tempnick],"No more connections allowed");
 702                 return;
 703         }
 704
 705         /*
 706          * XXX -
 707          * this is done as a safety check to keep the file descriptors within range of fd_ref_table.
 708          * its a pretty big but for the moment valid assumption:
 709          * file descriptors are handed out starting at 0, and are recycled as theyre freed.
 710          * therefore if there is ever an fd over 65535, 65536 clients must be connected to the
 711          * irc server at once (or the irc server otherwise initiating this many connections, files etc)
 712          * which for the time being is a physical impossibility (even the largest networks dont have more
 713          * than about 10,000 users on ONE server!)
 714          */
 715         if ((unsigned)socket >= MAX_DESCRIPTORS)
 716         {
 717                 kill_link(clientlist[tempnick],"Server is full");
 718                 return;
 719         }
 720         char* e = matches_exception(ipaddr);
 721         if (!e)
 722         {
 723                 char* r = matches_zline(ipaddr);
 724                 if (r)
 725                 {
 726                         char reason[MAXBUF];
 727                         snprintf(reason,MAXBUF,"Z-Lined: %s",r);
 728                         kill_link(clientlist[tempnick],reason);
 729                         return;
 730                 }
 731         }
 732
 733         ServerInstance->SE->AddFd(socket,true,X_ESTAB_CLIENT);
 734
 735         WriteServ(clientlist[tempnick]->fd,"NOTICE Auth :*** Looking up your hostname...");
 736 }
 737
 738 long FindMatchingGlobal(userrec* user)
 739 {
 740         long x = 0;
 741         for (user_hash::const_iterator a = clientlist.begin(); a != clientlist.end(); a++)
 742         {
 743                 if (a->second->ip4.s_addr == user->ip4.s_addr)
 744                         x++;
 745         }
 746         return x;
 747 }
 748
 749 long FindMatchingLocal(userrec* user)
 750 {
 751         long x = 0;
 752         for (std::vector<userrec*>::const_iterator a = local_users.begin(); a != local_users.end(); a++)
 753         {
 754                 userrec* comp = (userrec*)(*a);
 755                 if (comp->ip4.s_addr == user->ip4.s_addr)
 756                         x++;
 757         }
 758         return x;
 759 }
 760
 761 void FullConnectUser(userrec* user, CullList* Goners)
 762 {
 763         ServerInstance->stats->statsConnects++;
 764         user->idle_lastmsg = TIME;
 765         log(DEBUG,"ConnectUser: %s",user->nick);
 766
 767         ConnectClass a = GetClass(user);
 768
 769         if (a.type == CC_DENY)
 770         {
 771                 Goners->AddItem(user,"Unauthorised connection");
 772                 return;
 773         }
 774
 775         if ((*(a.pass.c_str())) && (!user->haspassed))
 776         {
 777                 Goners->AddItem(user,"Invalid password");
 778                 return;
 779         }
 780
 781         if (FindMatchingLocal(user) > a.maxlocal)
 782         {
 783                 Goners->AddItem(user,"No more connections allowed from your host via this connect class (local)");
 784                 WriteOpers("*** WARNING: maximum LOCAL connections (%ld) exceeded for IP %s",a.maxlocal,(char*)inet_ntoa(user->ip4));
 785                 return;
 786         }
 787         else if (FindMatchingGlobal(user) > a.maxglobal)
 788         {
 789                 Goners->AddItem(user,"No more connections allowed from your host via this connect class (global)");
 790                 WriteOpers("*** WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s",a.maxglobal,(char*)inet_ntoa(user->ip4));
 791                 return;
 792         }
 793
 794         char match_against[MAXBUF];
 795         snprintf(match_against,MAXBUF,"%s@%s",user->ident,user->host);
 796         char* e = matches_exception(match_against);
 797
 798         if (!e)
 799         {
 800                 char* r = matches_gline(match_against);
 801
 802                 if (r)
 803                 {
 804                         char reason[MAXBUF];
 805                         snprintf(reason,MAXBUF,"G-Lined: %s",r);
 806                         Goners->AddItem(user,reason);
 807                         return;
 808                 }
 809
 810                 r = matches_kline(user->host);
 811
 812                 if (r)
 813                 {
 814                         char reason[MAXBUF];
 815                         snprintf(reason,MAXBUF,"K-Lined: %s",r);
 816                         Goners->AddItem(user,reason);
 817                         return;
 818                 }
 819         }
 820
 821
 822         WriteServ(user->fd,"NOTICE Auth :Welcome to \002%s\002!",Config->Network);
 823         WriteServ(user->fd,"001 %s :Welcome to the %s IRC Network %s!%s@%s",user->nick,Config->Network,user->nick,user->ident,user->host);
 824         WriteServ(user->fd,"002 %s :Your host is %s, running version %s",user->nick,Config->ServerName,VERSION);
 825         WriteServ(user->fd,"003 %s :This server was created %s %s",user->nick,__TIME__,__DATE__);
 826         WriteServ(user->fd,"004 %s %s %s iowghrasxRVSCWBG lvhopsmntikrcaqbegIOLQRSKVHGCNT vhobeIaqglk",user->nick,Config->ServerName,VERSION);
 827
 828         // anfl @ #ratbox, efnet reminded me that according to the RFC this cant contain more than 13 tokens per line...
 829         // so i'd better split it :)
 830         std::stringstream out(Config->data005);
 831         std::string token = "";
 832         std::string line5 = "";
 833         int token_counter = 0;
 834
 835         while (!out.eof())
 836         {
 837                 out >> token;
 838                 line5 = line5 + token + " ";
 839                 token_counter++;
 840
 841                 if ((token_counter >= 13) || (out.eof() == true))
 842                 {
 843                         WriteServ(user->fd,"005 %s %s:are supported by this server",user->nick,line5.c_str());
 844                         line5 = "";
 845                         token_counter = 0;
 846                 }
 847         }
 848
 849         ShowMOTD(user);
 850
 851         /*
 852          * fix 3 by brain, move registered = 7 below these so that spurious modes and host
 853          * changes dont go out onto the network and produce 'fake direction'.
 854          */
 855         FOREACH_MOD(I_OnUserConnect,OnUserConnect(user));
 856         FOREACH_MOD(I_OnGlobalConnect,OnGlobalConnect(user));
 857         user->registered = 7;
 858         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));
 859 }
 860
 861 /** ReHashNick()
 862  * re-allocates a nick in the user_hash after they change nicknames,
 863  * returns a pointer to the new user as it may have moved
 864  */
 865 userrec* ReHashNick(char* Old, char* New)
 866 {
 867         //user_hash::iterator newnick;
 868         user_hash::iterator oldnick = clientlist.find(Old);
 869
 870         log(DEBUG,"ReHashNick: %s %s",Old,New);
 871
 872         if (!strcasecmp(Old,New))
 873         {
 874                 log(DEBUG,"old nick is new nick, skipping");
 875                 return oldnick->second;
 876         }
 877
 878         if (oldnick == clientlist.end())
 879                 return NULL; /* doesnt exist */
 880
 881         log(DEBUG,"ReHashNick: Found hashed nick %s",Old);
 882
 883         userrec* olduser = oldnick->second;
 884         clientlist[New] = olduser;
 885         clientlist.erase(oldnick);
 886
 887         log(DEBUG,"ReHashNick: Nick rehashed as %s",New);
 888
 889         return clientlist[New];
 890 }
 891
 892 void force_nickchange(userrec* user,const char* newnick)
 893 {
 894         char nick[MAXBUF];
 895         int MOD_RESULT = 0;
 896
 897         *nick = 0;
 898
 899         FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(user,newnick));
 900
 901         if (MOD_RESULT)
 902         {
 903                 ServerInstance->stats->statsCollisions++;
 904                 kill_link(user,"Nickname collision");
 905                 return;
 906         }
 907
 908         if (matches_qline(newnick))
 909         {
 910                 ServerInstance->stats->statsCollisions++;
 911                 kill_link(user,"Nickname collision");
 912                 return;
 913         }
 914
 915         if (user)
 916         {
 917                 if (newnick)
 918                 {
 919                         strlcpy(nick,newnick,MAXBUF-1);
 920                 }
 921
 922                 if (user->registered == 7)
 923                 {
 924                         char* pars[1];
 925
 926                         pars[0] = nick;
 927                         std::string cmd = "NICK";
 928                         ServerInstance->Parser->CallHandler(cmd,pars,1,user);
 929                 }
 930         }
 931 }