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 using namespace std;
  18
  19 #include "inspircd_config.h"
  20 #include "channels.h"
  21 #include "connection.h"
  22 #include "users.h"
  23 #include "inspircd.h"
  24 #include <stdio.h>
  25 #ifdef THREADED_DNS
  26 #include <pthread.h>
  27 #include <signal.h>
  28 #endif
  29 #include "inspstring.h"
  30 #include "commands.h"
  31 #include "helperfuncs.h"
  32 #include "typedefs.h"
  33 #include "socketengine.h"
  34 #include "hashcomp.h"
  35 #include "message.h"
  36 #include "wildcard.h"
  37 #include "xline.h"
  38 #include "cull_list.h"
  39
  40 extern InspIRCd* ServerInstance;
  41 extern int WHOWAS_STALE;
  42 extern int WHOWAS_MAX;
  43 extern std::vector<Module*> modules;
  44 extern std::vector<ircd_module*> factory;
  45 extern std::vector<InspSocket*> module_sockets;
  46 extern int MODCOUNT;
  47 extern InspSocket* socket_ref[MAX_DESCRIPTORS];
  48 extern time_t TIME;
  49 extern userrec* fd_ref_table[MAX_DESCRIPTORS];
  50 extern ServerConfig *Config;
  51 extern user_hash clientlist;
  52 extern whowas_hash whowas;
  53 extern std::vector<userrec*> local_users;
  54
  55 std::vector<userrec*> all_opers;
  56
  57 template<typename T> inline string ConvToStr(const T &in)
  58 {
  59         stringstream tmp;
  60         if (!(tmp << in)) return string();
  61         return tmp.str();
  62 }
  63
  64 userrec::userrec()
  65 {
  66         // the PROPER way to do it, AVOID bzero at *ALL* costs
  67         *password = *nick = *ident = *host = *dhost = *fullname = *modes = *awaymsg = *oper = 0;
  68         server = (char*)FindServerNamePtr(Config->ServerName);
  69         reset_due = TIME;
  70         lines_in = fd = lastping = signon = idle_lastmsg = nping = registered = 0;
  71         timeout = flood = port = bytes_in = bytes_out = cmds_in = cmds_out = 0;
  72         haspassed = dns_done = false;
  73         recvq = "";
  74         sendq = "";
  75         chans.clear();
  76         invites.clear();
  77 }
  78
  79 userrec::~userrec()
  80 {
  81 }
  82
  83 void userrec::MakeHost(char* nhost)
  84 {
  85         /* This is much faster than snprintf */
  86         char* t = nhost;
  87         for(char* n = ident; *n; n++)
  88                 *t++ = *n;
  89         *t++ = '@';
  90         for(char* n = host; *n; n++)
  91                 *t++ = *n;
  92         *t = 0;
  93 }
  94
  95 void userrec::CloseSocket()
  96 {
  97         shutdown(this->fd,2);
  98         close(this->fd);
  99 }
 100
 101 char* userrec::GetFullHost()
 102 {
 103         static char result[MAXBUF];
 104         char* t = result;
 105         for(char* n = nick; *n; n++)
 106                 *t++ = *n;
 107         *t++ = '!';
 108         for(char* n = ident; *n; n++)
 109                 *t++ = *n;
 110         *t++ = '@';
 111         for(char* n = dhost; *n; n++)
 112                 *t++ = *n;
 113         *t = 0;
 114         return result;
 115 }
 116
 117 char* userrec::MakeWildHost()
 118 {
 119         static char nresult[MAXBUF];
 120         char* t = nresult;
 121         *t++ = '*';     *t++ = '!';
 122         *t++ = '*';     *t++ = '@';
 123         for(char* n = dhost; *n; n++)
 124                 *t++ = *n;
 125         *t = 0;
 126         return nresult;
 127 }
 128
 129 int userrec::ReadData(void* buffer, size_t size)
 130 {
 131         if (this->fd > -1)
 132         {
 133                 return read(this->fd, buffer, size);
 134         }
 135         else return 0;
 136 }
 137
 138
 139 char* userrec::GetFullRealHost()
 140 {
 141         static char fresult[MAXBUF];
 142         char* t = fresult;
 143         for(char* n = nick; *n; n++)
 144                 *t++ = *n;
 145         *t++ = '!';
 146         for(char* n = ident; *n; n++)
 147                 *t++ = *n;
 148         *t++ = '@';
 149         for(char* n = host; *n; n++)
 150                 *t++ = *n;
 151         *t = 0;
 152         return fresult;
 153 }
 154
 155 bool userrec::IsInvited(irc::string &channel)
 156 {
 157         for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 158         {
 159                 irc::string compare = i->channel;
 160                 if (compare == channel)
 161                 {
 162                         return true;
 163                 }
 164         }
 165         return false;
 166 }
 167
 168 InvitedList* userrec::GetInviteList()
 169 {
 170         return &invites;
 171 }
 172
 173 void userrec::InviteTo(irc::string &channel)
 174 {
 175         Invited i;
 176         i.channel = channel;
 177         invites.push_back(i);
 178 }
 179
 180 void userrec::RemoveInvite(irc::string &channel)
 181 {
 182         log(DEBUG,"Removing invites");
 183         if (invites.size())
 184         {
 185                 for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 186                 {
 187                         irc::string compare = i->channel;
 188                         if (compare == channel)
 189                         {
 190                                 invites.erase(i);
 191                                 return;
 192                         }
 193                 }
 194         }
 195 }
 196
 197 bool userrec::HasPermission(std::string &command)
 198 {
 199         char TypeName[MAXBUF],Classes[MAXBUF],ClassName[MAXBUF],CommandList[MAXBUF];
 200         char* mycmd;
 201         char* savept;
 202         char* savept2;
 203
 204         // users on u-lined servers can completely bypass
 205         // all permissions based checks.
 206         //
 207         // of course, if this is sent to a remote server and this
 208         // server is not ulined there, then that other server
 209         // silently drops the command.
 210         if (is_uline(this->server))
 211                 return true;
 212
 213         // are they even an oper at all?
 214         if (*this->oper)
 215         {
 216                 for (int j =0; j < Config->ConfValueEnum("type",&Config->config_f); j++)
 217                 {
 218                         Config->ConfValue("type","name",j,TypeName,&Config->config_f);
 219                         if (!strcmp(TypeName,this->oper))
 220                         {
 221                                 Config->ConfValue("type","classes",j,Classes,&Config->config_f);
 222                                 char* myclass = strtok_r(Classes," ",&savept);
 223                                 while (myclass)
 224                                 {
 225                                         for (int k =0; k < Config->ConfValueEnum("class",&Config->config_f); k++)
 226                                         {
 227                                                 Config->ConfValue("class","name",k,ClassName,&Config->config_f);
 228                                                 if (!strcmp(ClassName,myclass))
 229                                                 {
 230                                                         Config->ConfValue("class","commands",k,CommandList,&Config->config_f);
 231                                                         mycmd = strtok_r(CommandList," ",&savept2);
 232                                                         while (mycmd)
 233                                                         {
 234                                                                 if ((!strcasecmp(mycmd,command.c_str())) || (*mycmd == '*'))
 235                                                                 {
 236                                                                         return true;
 237                                                                 }
 238                                                                 mycmd = strtok_r(NULL," ",&savept2);
 239                                                         }
 240                                                 }
 241                                         }
 242                                         myclass = strtok_r(NULL," ",&savept);
 243                                 }
 244                         }
 245                 }
 246         }
 247         return false;
 248 }
 249
 250
 251 bool userrec::AddBuffer(std::string a)
 252 {
 253         std::string b = "";
 254         for (unsigned int i = 0; i < a.length(); i++)
 255                 if ((a[i] != '\r') && (a[i] != '\0') && (a[i] != 7))
 256                         b = b + a[i];
 257         std::stringstream stream(recvq);
 258         stream << b;
 259         recvq = stream.str();
 260         unsigned int i = 0;
 261         // count the size of the first line in the buffer.
 262         while (i < recvq.length())
 263         {
 264                 if (recvq[i++] == '\n')
 265                         break;
 266         }
 267         if (recvq.length() > (unsigned)this->recvqmax)
 268         {
 269                 this->SetWriteError("RecvQ exceeded");
 270                 WriteOpers("*** User %s RecvQ of %d exceeds connect class maximum of %d",this->nick,recvq.length(),this->recvqmax);
 271         }
 272         // return false if we've had more than 600 characters WITHOUT
 273         // a carriage return (this is BAD, drop the socket)
 274         return (i < 600);
 275 }
 276
 277 bool userrec::BufferIsReady()
 278 {
 279         unsigned int t = recvq.length();
 280         for (unsigned int i = 0; i < t; i++)
 281                 if (recvq[i] == '\n')
 282                         return true;
 283         return false;
 284 }
 285
 286 void userrec::ClearBuffer()
 287 {
 288         recvq = "";
 289 }
 290
 291 std::string userrec::GetBuffer()
 292 {
 293         if (recvq == "")
 294                 return "";
 295         char* line = (char*)recvq.c_str();
 296         std::string ret = "";
 297         while ((*line != '\n') && (*line))
 298         {
 299                 ret = ret + *line;
 300                 line++;
 301         }
 302         if ((*line == '\n') || (*line == '\r'))
 303                 line++;
 304         recvq = line;
 305         return ret;
 306 }
 307
 308 void userrec::AddWriteBuf(std::string data)
 309 {
 310         if (this->GetWriteError() != "")
 311                 return;
 312         if (sendq.length() + data.length() > (unsigned)this->sendqmax)
 313         {
 314                 /* Fix by brain - Set the error text BEFORE calling writeopers, because
 315                  * if we dont it'll recursively  call here over and over again trying
 316                  * to repeatedly add the text to the sendq!
 317                  */
 318                 this->SetWriteError("SendQ exceeded");
 319                 WriteOpers("*** User %s SendQ of %d exceeds connect class maximum of %d",this->nick,sendq.length() + data.length(),this->sendqmax);
 320                 return;
 321         }
 322         std::stringstream stream;
 323         stream << sendq << data;
 324         sendq = stream.str();
 325 }
 326
 327 // send AS MUCH OF THE USERS SENDQ as we are able to (might not be all of it)
 328 void userrec::FlushWriteBuf()
 329 {
 330         if ((sendq.length()) && (this->fd != FD_MAGIC_NUMBER))
 331         {
 332                 char* tb = (char*)this->sendq.c_str();
 333                 int n_sent = write(this->fd,tb,this->sendq.length());
 334                 if (n_sent == -1)
 335                 {
 336                         this->SetWriteError(strerror(errno));
 337                 }
 338                 else
 339                 {
 340                         // advance the queue
 341                         tb += n_sent;
 342                         this->sendq = tb;
 343                         // update the user's stats counters
 344                         this->bytes_out += n_sent;
 345                         this->cmds_out++;
 346                 }
 347         }
 348 }
 349
 350 void userrec::SetWriteError(std::string error)
 351 {
 352         log(DEBUG,"Setting error string for %s to '%s'",this->nick,error.c_str());
 353         // don't try to set the error twice, its already set take the first string.
 354         if (this->WriteError == "")
 355                 this->WriteError = error;
 356 }
 357
 358 std::string userrec::GetWriteError()
 359 {
 360         return this->WriteError;
 361 }
 362
 363 void AddOper(userrec* user)
 364 {
 365         log(DEBUG,"Oper added to optimization list");
 366         all_opers.push_back(user);
 367 }
 368
 369 void DeleteOper(userrec* user)
 370 {
 371         for (std::vector<userrec*>::iterator a = all_opers.begin(); a < all_opers.end(); a++)
 372         {
 373                 if (*a == user)
 374                 {
 375                         log(DEBUG,"Oper removed from optimization list");
 376                         all_opers.erase(a);
 377                         return;
 378                 }
 379         }
 380 }
 381
 382 void kill_link(userrec *user,const char* r)
 383 {
 384         user_hash::iterator iter = clientlist.find(user->nick);
 385
 386         char reason[MAXBUF];
 387
 388         strlcpy(reason,r,MAXBUF);
 389
 390         if (strlen(reason)>MAXQUIT)
 391         {
 392                 reason[MAXQUIT-1] = '\0';
 393         }
 394
 395         log(DEBUG,"kill_link: %s '%s'",user->nick,reason);
 396         Write(user->fd,"ERROR :Closing link (%s@%s) [%s]",user->ident,user->host,reason);
 397         log(DEBUG,"closing fd %lu",(unsigned long)user->fd);
 398
 399         if (user->registered == 7) {
 400                 FOREACH_MOD(I_OnUserQuit,OnUserQuit(user,reason));
 401                 WriteCommonExcept(user,"QUIT :%s",reason);
 402         }
 403
 404         user->FlushWriteBuf();
 405
 406         FOREACH_MOD(I_OnUserDisconnect,OnUserDisconnect(user));
 407
 408         if (user->fd > -1)
 409         {
 410                 if (Config->GetIOHook(user->port))
 411                 {
 412                         Config->GetIOHook(user->port)->OnRawSocketClose(user->fd);
 413                 }
 414                 ServerInstance->SE->DelFd(user->fd);
 415                 user->CloseSocket();
 416         }
 417
 418         // this must come before the WriteOpers so that it doesnt try to fill their buffer with anything
 419         // if they were an oper with +s.
 420         if (user->registered == 7) {
 421                 purge_empty_chans(user);
 422                 // fix by brain: only show local quits because we only show local connects (it just makes SENSE)
 423                 if (user->fd > -1)
 424                         WriteOpers("*** Client exiting: %s!%s@%s [%s]",user->nick,user->ident,user->host,reason);
 425                 AddWhoWas(user);
 426         }
 427
 428         if (iter != clientlist.end())
 429         {
 430                 log(DEBUG,"deleting user hash value %lu",(unsigned long)user);
 431                 if (user->fd > -1)
 432                 {
 433                         fd_ref_table[user->fd] = NULL;
 434                         if (find(local_users.begin(),local_users.end(),user) != local_users.end())
 435                         {
 436                                 local_users.erase(find(local_users.begin(),local_users.end(),user));
 437                                 log(DEBUG,"Delete local user");
 438                         }
 439                 }
 440                 clientlist.erase(iter);
 441         }
 442         delete user;
 443 }
 444
 445 void kill_link_silent(userrec *user,const char* r)
 446 {
 447         user_hash::iterator iter = clientlist.find(user->nick);
 448
 449         char reason[MAXBUF];
 450
 451         strlcpy(reason,r,MAXBUF);
 452
 453         if (strlen(reason)>MAXQUIT)
 454         {
 455                 reason[MAXQUIT-1] = '\0';
 456         }
 457
 458         log(DEBUG,"kill_link: %s '%s'",user->nick,reason);
 459         Write(user->fd,"ERROR :Closing link (%s@%s) [%s]",user->ident,user->host,reason);
 460         log(DEBUG,"closing fd %lu",(unsigned long)user->fd);
 461
 462         user->FlushWriteBuf();
 463
 464         if (user->registered == 7) {
 465                 FOREACH_MOD(I_OnUserQuit,OnUserQuit(user,reason));
 466                 WriteCommonExcept(user,"QUIT :%s",reason);
 467         }
 468
 469         FOREACH_MOD(I_OnUserDisconnect,OnUserDisconnect(user));
 470
 471         if (user->fd > -1)
 472         {
 473                 if (Config->GetIOHook(user->port))
 474                 {
 475                         Config->GetIOHook(user->port)->OnRawSocketClose(user->fd);
 476                 }
 477                 ServerInstance->SE->DelFd(user->fd);
 478                 user->CloseSocket();
 479         }
 480
 481         if (user->registered == 7) {
 482                 purge_empty_chans(user);
 483         }
 484
 485         if (iter != clientlist.end())
 486         {
 487                 log(DEBUG,"deleting user hash value %lu",(unsigned long)user);
 488                 if (user->fd > -1)
 489                 {
 490                         fd_ref_table[user->fd] = NULL;
 491                         if (find(local_users.begin(),local_users.end(),user) != local_users.end())
 492                         {
 493                                 log(DEBUG,"Delete local user");
 494                                 local_users.erase(find(local_users.begin(),local_users.end(),user));
 495                         }
 496                 }
 497                 clientlist.erase(iter);
 498         }
 499         delete user;
 500 }
 501
 502
 503 /* adds or updates an entry in the whowas list */
 504 void AddWhoWas(userrec* u)
 505 {
 506         whowas_hash::iterator iter = whowas.find(u->nick);
 507         WhoWasUser *a = new WhoWasUser();
 508         strlcpy(a->nick,u->nick,NICKMAX);
 509         strlcpy(a->ident,u->ident,IDENTMAX);
 510         strlcpy(a->dhost,u->dhost,160);
 511         strlcpy(a->host,u->host,160);
 512         strlcpy(a->fullname,u->fullname,MAXGECOS);
 513         if (u->server)
 514                 strlcpy(a->server,u->server,256);
 515         a->signon = u->signon;
 516
 517         /* MAX_WHOWAS:   max number of /WHOWAS items
 518          * WHOWAS_STALE: number of hours before a WHOWAS item is marked as stale and
 519          *               can be replaced by a newer one
 520          */
 521
 522         if (iter == whowas.end())
 523         {
 524                 if (whowas.size() >= (unsigned)WHOWAS_MAX)
 525                 {
 526                         for (whowas_hash::iterator i = whowas.begin(); i != whowas.end(); i++)
 527                         {
 528                                 // 3600 seconds in an hour ;)
 529                                 if ((i->second->signon)<(TIME-(WHOWAS_STALE*3600)))
 530                                 {
 531                                         // delete the old one
 532                                         if (i->second) delete i->second;
 533                                         // replace with new one
 534                                         i->second = a;
 535                                         log(DEBUG,"added WHOWAS entry, purged an old record");
 536                                         return;
 537                                 }
 538                         }
 539                         // no space left and user doesnt exist. Don't leave ram in use!
 540                         log(DEBUG,"Not able to update whowas (list at WHOWAS_MAX entries and trying to add new?), freeing excess ram");
 541                         delete a;
 542                 }
 543                 else
 544                 {
 545                         log(DEBUG,"added fresh WHOWAS entry");
 546                         whowas[a->nick] = a;
 547                 }
 548         }
 549         else
 550         {
 551                 log(DEBUG,"updated WHOWAS entry");
 552                 if (iter->second) delete iter->second;
 553                 iter->second = a;
 554         }
 555 }
 556
 557 /* add a client connection to the sockets list */
 558 void AddClient(int socket, int port, bool iscached, in_addr ip4)
 559 {
 560         string tempnick;
 561         char tn2[MAXBUF];
 562         user_hash::iterator iter;
 563
 564         tempnick = ConvToStr(socket) + "-unknown";
 565         sprintf(tn2,"%d-unknown",socket);
 566
 567         iter = clientlist.find(tempnick);
 568
 569         // fix by brain.
 570         // as these nicknames are 'RFC impossible', we can be sure nobody is going to be
 571         // using one as a registered connection. As theyre per fd, we can also safely assume
 572         // that we wont have collisions. Therefore, if the nick exists in the list, its only
 573         // used by a dead socket, erase the iterator so that the new client may reclaim it.
 574         // this was probably the cause of 'server ignores me when i hammer it with reconnects'
 575         // issue in earlier alphas/betas
 576         if (iter != clientlist.end())
 577         {
 578                 userrec* goner = iter->second;
 579                 delete goner;
 580                 clientlist.erase(iter);
 581         }
 582
 583         /*
 584          * It is OK to access the value here this way since we know
 585          * it exists, we just created it above.
 586          *
 587          * At NO other time should you access a value in a map or a
 588          * hash_map this way.
 589          */
 590         clientlist[tempnick] = new userrec();
 591
 592         char *ipaddr = (char*)inet_ntoa(ip4);
 593
 594         log(DEBUG,"AddClient: %d %d %s",socket,port,ipaddr);
 595
 596         clientlist[tempnick]->fd = socket;
 597         strlcpy(clientlist[tempnick]->nick, tn2,NICKMAX);
 598         /* We don't know the host yet, dns lookup could still be going on,
 599          * so instead we just put the ip address here, for now.
 600          */
 601         strlcpy(clientlist[tempnick]->host, ipaddr, 160);
 602         strlcpy(clientlist[tempnick]->dhost, ipaddr, 160);
 603         clientlist[tempnick]->server = (char*)FindServerNamePtr(Config->ServerName);
 604         strlcpy(clientlist[tempnick]->ident, "unknown",IDENTMAX);
 605         clientlist[tempnick]->registered = 0;
 606         clientlist[tempnick]->signon = TIME + Config->dns_timeout;
 607         clientlist[tempnick]->lastping = 1;
 608         clientlist[tempnick]->ip4 = ip4;
 609         clientlist[tempnick]->port = port;
 610
 611         // set the registration timeout for this user
 612         unsigned long class_regtimeout = 90;
 613         int class_flood = 0;
 614         long class_threshold = 5;
 615         long class_sqmax = 262144;      // 256kb
 616         long class_rqmax = 4096;        // 4k
 617
 618         for (ClassVector::iterator i = Config->Classes.begin(); i != Config->Classes.end(); i++)
 619         {
 620                 if (match(ipaddr,i->host.c_str()) && (i->type == CC_ALLOW))
 621                 {
 622                         class_regtimeout = (unsigned long)i->registration_timeout;
 623                         class_flood = i->flood;
 624                         clientlist[tempnick]->pingmax = i->pingtime;
 625                         class_threshold = i->threshold;
 626                         class_sqmax = i->sendqmax;
 627                         class_rqmax = i->recvqmax;
 628                         break;
 629                 }
 630         }
 631
 632         clientlist[tempnick]->nping = TIME+clientlist[tempnick]->pingmax + Config->dns_timeout;
 633         clientlist[tempnick]->timeout = TIME+class_regtimeout;
 634         clientlist[tempnick]->flood = class_flood;
 635         clientlist[tempnick]->threshold = class_threshold;
 636         clientlist[tempnick]->sendqmax = class_sqmax;
 637         clientlist[tempnick]->recvqmax = class_rqmax;
 638
 639         ucrec a;
 640         a.channel = NULL;
 641         a.uc_modes = 0;
 642         for (int i = 0; i < MAXCHANS; i++)
 643                 clientlist[tempnick]->chans.push_back(a);
 644
 645         if (local_users.size() > Config->SoftLimit)
 646         {
 647                 kill_link(clientlist[tempnick],"No more connections allowed");
 648                 return;
 649         }
 650
 651         if (local_users.size() >= MAXCLIENTS)
 652         {
 653                 kill_link(clientlist[tempnick],"No more connections allowed");
 654                 return;
 655         }
 656
 657         // this is done as a safety check to keep the file descriptors within range of fd_ref_table.
 658         // its a pretty big but for the moment valid assumption:
 659         // file descriptors are handed out starting at 0, and are recycled as theyre freed.
 660         // therefore if there is ever an fd over 65535, 65536 clients must be connected to the
 661         // irc server at once (or the irc server otherwise initiating this many connections, files etc)
 662         // which for the time being is a physical impossibility (even the largest networks dont have more
 663         // than about 10,000 users on ONE server!)
 664         if ((unsigned)socket > MAX_DESCRIPTORS)
 665         {
 666                 kill_link(clientlist[tempnick],"Server is full");
 667                 return;
 668         }
 669         char* e = matches_exception(ipaddr);
 670         if (!e)
 671         {
 672                 char* r = matches_zline(ipaddr);
 673                 if (r)
 674                 {
 675                         char reason[MAXBUF];
 676                         snprintf(reason,MAXBUF,"Z-Lined: %s",r);
 677                         kill_link(clientlist[tempnick],reason);
 678                         return;
 679                 }
 680         }
 681         fd_ref_table[socket] = clientlist[tempnick];
 682         local_users.push_back(clientlist[tempnick]);
 683         ServerInstance->SE->AddFd(socket,true,X_ESTAB_CLIENT);
 684
 685         WriteServ(clientlist[tempnick]->fd,"NOTICE Auth :*** Looking up your hostname...");
 686 }
 687
 688 long FindMatchingGlobal(userrec* user)
 689 {
 690         long x = 0;
 691         for (user_hash::const_iterator a = clientlist.begin(); a != clientlist.end(); a++)
 692         {
 693                 if (a->second->ip4.s_addr == user->ip4.s_addr)
 694                         x++;
 695         }
 696         return x;
 697 }
 698
 699 long FindMatchingLocal(userrec* user)
 700 {
 701         long x = 0;
 702         for (std::vector<userrec*>::const_iterator a = local_users.begin(); a != local_users.end(); a++)
 703         {
 704                 userrec* comp = (userrec*)(*a);
 705                 if (comp->ip4.s_addr == user->ip4.s_addr)
 706                         x++;
 707         }
 708         return x;
 709 }
 710
 711 void FullConnectUser(userrec* user, CullList* Goners)
 712 {
 713         ServerInstance->stats->statsConnects++;
 714         user->idle_lastmsg = TIME;
 715         log(DEBUG,"ConnectUser: %s",user->nick);
 716
 717         ConnectClass a = GetClass(user);
 718
 719         if (a.type == CC_DENY)
 720         {
 721                 Goners->AddItem(user,"Unauthorised connection");
 722                 return;
 723         }
 724         if ((*(a.pass.c_str())) && (!user->haspassed))
 725         {
 726                 Goners->AddItem(user,"Invalid password");
 727                 return;
 728         }
 729         if (FindMatchingLocal(user) > a.maxlocal)
 730         {
 731                 Goners->AddItem(user,"No more connections allowed from your host via this connect class (local)");
 732                 WriteOpers("*** WARNING: maximum LOCAL connections (%ld) exceeded for IP %s",a.maxlocal,(char*)inet_ntoa(user->ip4));
 733                 return;
 734         }
 735         else if (FindMatchingGlobal(user) > a.maxglobal)
 736         {
 737                 Goners->AddItem(user,"No more connections allowed from your host via this connect class (global)");
 738                 WriteOpers("*** WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s",a.maxglobal,(char*)inet_ntoa(user->ip4));
 739                 return;
 740         }
 741
 742         char match_against[MAXBUF];
 743         snprintf(match_against,MAXBUF,"%s@%s",user->ident,user->host);
 744         char* e = matches_exception(match_against);
 745         if (!e)
 746         {
 747                 char* r = matches_gline(match_against);
 748                 if (r)
 749                 {
 750                         char reason[MAXBUF];
 751                         snprintf(reason,MAXBUF,"G-Lined: %s",r);
 752                         Goners->AddItem(user,reason);
 753                         return;
 754                 }
 755                 r = matches_kline(user->host);
 756                 if (r)
 757                 {
 758                         char reason[MAXBUF];
 759                         snprintf(reason,MAXBUF,"K-Lined: %s",r);
 760                         Goners->AddItem(user,reason);
 761                         return;
 762                 }
 763         }
 764
 765
 766         WriteServ(user->fd,"NOTICE Auth :Welcome to \002%s\002!",Config->Network);
 767         WriteServ(user->fd,"001 %s :Welcome to the %s IRC Network %s!%s@%s",user->nick,Config->Network,user->nick,user->ident,user->host);
 768         WriteServ(user->fd,"002 %s :Your host is %s, running version %s",user->nick,Config->ServerName,VERSION);
 769         WriteServ(user->fd,"003 %s :This server was created %s %s",user->nick,__TIME__,__DATE__);
 770         WriteServ(user->fd,"004 %s %s %s iowghrasxRVSCWBG lvhopsmntikrcaqbegIOLQRSKVHGCNT vhobeIaqglk",user->nick,Config->ServerName,VERSION);
 771         // anfl @ #ratbox, efnet reminded me that according to the RFC this cant contain more than 13 tokens per line...
 772         // so i'd better split it :)
 773         std::stringstream out(Config->data005);
 774         std::string token = "";
 775         std::string line5 = "";
 776         int token_counter = 0;
 777         while (!out.eof())
 778         {
 779                 out >> token;
 780                 line5 = line5 + token + " ";
 781                 token_counter++;
 782                 if ((token_counter >= 13) || (out.eof() == true))
 783                 {
 784                         WriteServ(user->fd,"005 %s %s:are supported by this server",user->nick,line5.c_str());
 785                         line5 = "";
 786                         token_counter = 0;
 787                 }
 788         }
 789         ShowMOTD(user);
 790
 791         // fix 3 by brain, move registered = 7 below these so that spurious modes and host changes dont go out
 792         // onto the network and produce 'fake direction'
 793         FOREACH_MOD(I_OnUserConnect,OnUserConnect(user));
 794         FOREACH_MOD(I_OnGlobalConnect,OnGlobalConnect(user));
 795         user->registered = 7;
 796         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));
 797 }
 798
 799 /* re-allocates a nick in the user_hash after they change nicknames,
 800  * returns a pointer to the new user as it may have moved */
 801
 802 userrec* ReHashNick(char* Old, char* New)
 803 {
 804         //user_hash::iterator newnick;
 805         user_hash::iterator oldnick = clientlist.find(Old);
 806
 807         log(DEBUG,"ReHashNick: %s %s",Old,New);
 808
 809         if (!strcasecmp(Old,New))
 810         {
 811                 log(DEBUG,"old nick is new nick, skipping");
 812                 return oldnick->second;
 813         }
 814
 815         if (oldnick == clientlist.end()) return NULL; /* doesnt exist */
 816
 817         log(DEBUG,"ReHashNick: Found hashed nick %s",Old);
 818
 819         userrec* olduser = oldnick->second;
 820         clientlist[New] = olduser;
 821         clientlist.erase(oldnick);
 822
 823         log(DEBUG,"ReHashNick: Nick rehashed as %s",New);
 824
 825         return clientlist[New];
 826 }
 827
 828 void force_nickchange(userrec* user,const char* newnick)
 829 {
 830         char nick[MAXBUF];
 831         int MOD_RESULT = 0;
 832
 833         *nick = 0;
 834
 835         FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(user,newnick));
 836         if (MOD_RESULT) {
 837                 ServerInstance->stats->statsCollisions++;
 838                 kill_link(user,"Nickname collision");
 839                 return;
 840         }
 841         if (matches_qline(newnick))
 842         {
 843                 ServerInstance->stats->statsCollisions++;
 844                 kill_link(user,"Nickname collision");
 845                 return;
 846         }
 847
 848         if (user)
 849         {
 850                 if (newnick)
 851                 {
 852                         strlcpy(nick,newnick,MAXBUF);
 853                 }
 854                 if (user->registered == 7)
 855                 {
 856                         char* pars[1];
 857                         pars[0] = nick;
 858                         std::string cmd = "NICK";
 859                         ServerInstance->Parser->CallHandler(cmd,pars,1,user);
 860                 }
 861         }
 862 }
 863