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         *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 (strchr(this->modes,'o'))
 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         for (unsigned int i = 0; i < recvq.length(); i++)
 280                 if (recvq[i] == '\n')
 281                         return true;
 282         return false;
 283 }
 284
 285 void userrec::ClearBuffer()
 286 {
 287         recvq = "";
 288 }
 289
 290 std::string userrec::GetBuffer()
 291 {
 292         if (recvq == "")
 293                 return "";
 294         char* line = (char*)recvq.c_str();
 295         std::string ret = "";
 296         while ((*line != '\n') && (strlen(line)))
 297         {
 298                 ret = ret + *line;
 299                 line++;
 300         }
 301         if ((*line == '\n') || (*line == '\r'))
 302                 line++;
 303         recvq = line;
 304         return ret;
 305 }
 306
 307 void userrec::AddWriteBuf(std::string data)
 308 {
 309         if (this->GetWriteError() != "")
 310                 return;
 311         if (sendq.length() + data.length() > (unsigned)this->sendqmax)
 312         {
 313                 /* Fix by brain - Set the error text BEFORE calling writeopers, because
 314                  * if we dont it'll recursively  call here over and over again trying
 315                  * to repeatedly add the text to the sendq!
 316                  */
 317                 this->SetWriteError("SendQ exceeded");
 318                 WriteOpers("*** User %s SendQ of %d exceeds connect class maximum of %d",this->nick,sendq.length() + data.length(),this->sendqmax);
 319                 return;
 320         }
 321         std::stringstream stream;
 322         stream << sendq << data;
 323         sendq = stream.str();
 324 }
 325
 326 // send AS MUCH OF THE USERS SENDQ as we are able to (might not be all of it)
 327 void userrec::FlushWriteBuf()
 328 {
 329         if ((sendq.length()) && (this->fd != FD_MAGIC_NUMBER))
 330         {
 331                 char* tb = (char*)this->sendq.c_str();
 332                 int n_sent = write(this->fd,tb,this->sendq.length());
 333                 if (n_sent == -1)
 334                 {
 335                         this->SetWriteError(strerror(errno));
 336                 }
 337                 else
 338                 {
 339                         // advance the queue
 340                         tb += n_sent;
 341                         this->sendq = tb;
 342                         // update the user's stats counters
 343                         this->bytes_out += n_sent;
 344                         this->cmds_out++;
 345                 }
 346         }
 347 }
 348
 349 void userrec::SetWriteError(std::string error)
 350 {
 351         log(DEBUG,"Setting error string for %s to '%s'",this->nick,error.c_str());
 352         // don't try to set the error twice, its already set take the first string.
 353         if (this->WriteError == "")
 354                 this->WriteError = error;
 355 }
 356
 357 std::string userrec::GetWriteError()
 358 {
 359         return this->WriteError;
 360 }
 361
 362 void AddOper(userrec* user)
 363 {
 364         log(DEBUG,"Oper added to optimization list");
 365         all_opers.push_back(user);
 366 }
 367
 368 void DeleteOper(userrec* user)
 369 {
 370         for (std::vector<userrec*>::iterator a = all_opers.begin(); a < all_opers.end(); a++)
 371         {
 372                 if (*a == user)
 373                 {
 374                         log(DEBUG,"Oper removed from optimization list");
 375                         all_opers.erase(a);
 376                         return;
 377                 }
 378         }
 379 }
 380
 381 void kill_link(userrec *user,const char* r)
 382 {
 383         user_hash::iterator iter = clientlist.find(user->nick);
 384
 385         char reason[MAXBUF];
 386
 387         strlcpy(reason,r,MAXBUF);
 388
 389         if (strlen(reason)>MAXQUIT)
 390         {
 391                 reason[MAXQUIT-1] = '\0';
 392         }
 393
 394         log(DEBUG,"kill_link: %s '%s'",user->nick,reason);
 395         Write(user->fd,"ERROR :Closing link (%s@%s) [%s]",user->ident,user->host,reason);
 396         log(DEBUG,"closing fd %lu",(unsigned long)user->fd);
 397
 398         if (user->registered == 7) {
 399                 FOREACH_MOD(I_OnUserQuit,OnUserQuit(user,reason));
 400                 WriteCommonExcept(user,"QUIT :%s",reason);
 401         }
 402
 403         user->FlushWriteBuf();
 404
 405         FOREACH_MOD(I_OnUserDisconnect,OnUserDisconnect(user));
 406
 407         if (user->fd > -1)
 408         {
 409                 if (Config->GetIOHook(user->port))
 410                 {
 411                         Config->GetIOHook(user->port)->OnRawSocketClose(user->fd);
 412                 }
 413                 ServerInstance->SE->DelFd(user->fd);
 414                 user->CloseSocket();
 415         }
 416
 417         // this must come before the WriteOpers so that it doesnt try to fill their buffer with anything
 418         // if they were an oper with +s.
 419         if (user->registered == 7) {
 420                 purge_empty_chans(user);
 421                 // fix by brain: only show local quits because we only show local connects (it just makes SENSE)
 422                 if (user->fd > -1)
 423                         WriteOpers("*** Client exiting: %s!%s@%s [%s]",user->nick,user->ident,user->host,reason);
 424                 AddWhoWas(user);
 425         }
 426
 427         if (iter != clientlist.end())
 428         {
 429                 log(DEBUG,"deleting user hash value %lu",(unsigned long)user);
 430                 if (user->fd > -1)
 431                 {
 432                         fd_ref_table[user->fd] = NULL;
 433                         if (find(local_users.begin(),local_users.end(),user) != local_users.end())
 434                         {
 435                                 local_users.erase(find(local_users.begin(),local_users.end(),user));
 436                                 log(DEBUG,"Delete local user");
 437                         }
 438                 }
 439                 clientlist.erase(iter);
 440         }
 441         delete user;
 442 }
 443
 444 void kill_link_silent(userrec *user,const char* r)
 445 {
 446         user_hash::iterator iter = clientlist.find(user->nick);
 447
 448         char reason[MAXBUF];
 449
 450         strlcpy(reason,r,MAXBUF);
 451
 452         if (strlen(reason)>MAXQUIT)
 453         {
 454                 reason[MAXQUIT-1] = '\0';
 455         }
 456
 457         log(DEBUG,"kill_link: %s '%s'",user->nick,reason);
 458         Write(user->fd,"ERROR :Closing link (%s@%s) [%s]",user->ident,user->host,reason);
 459         log(DEBUG,"closing fd %lu",(unsigned long)user->fd);
 460
 461         user->FlushWriteBuf();
 462
 463         if (user->registered == 7) {
 464                 FOREACH_MOD(I_OnUserQuit,OnUserQuit(user,reason));
 465                 WriteCommonExcept(user,"QUIT :%s",reason);
 466         }
 467
 468         FOREACH_MOD(I_OnUserDisconnect,OnUserDisconnect(user));
 469
 470         if (user->fd > -1)
 471         {
 472                 if (Config->GetIOHook(user->port))
 473                 {
 474                         Config->GetIOHook(user->port)->OnRawSocketClose(user->fd);
 475                 }
 476                 ServerInstance->SE->DelFd(user->fd);
 477                 user->CloseSocket();
 478         }
 479
 480         if (user->registered == 7) {
 481                 purge_empty_chans(user);
 482         }
 483
 484         if (iter != clientlist.end())
 485         {
 486                 log(DEBUG,"deleting user hash value %lu",(unsigned long)user);
 487                 if (user->fd > -1)
 488                 {
 489                         fd_ref_table[user->fd] = NULL;
 490                         if (find(local_users.begin(),local_users.end(),user) != local_users.end())
 491                         {
 492                                 log(DEBUG,"Delete local user");
 493                                 local_users.erase(find(local_users.begin(),local_users.end(),user));
 494                         }
 495                 }
 496                 clientlist.erase(iter);
 497         }
 498         delete user;
 499 }
 500
 501
 502 /* adds or updates an entry in the whowas list */
 503 void AddWhoWas(userrec* u)
 504 {
 505         whowas_hash::iterator iter = whowas.find(u->nick);
 506         WhoWasUser *a = new WhoWasUser();
 507         strlcpy(a->nick,u->nick,NICKMAX);
 508         strlcpy(a->ident,u->ident,IDENTMAX);
 509         strlcpy(a->dhost,u->dhost,160);
 510         strlcpy(a->host,u->host,160);
 511         strlcpy(a->fullname,u->fullname,MAXGECOS);
 512         if (u->server)
 513                 strlcpy(a->server,u->server,256);
 514         a->signon = u->signon;
 515
 516         /* MAX_WHOWAS:   max number of /WHOWAS items
 517          * WHOWAS_STALE: number of hours before a WHOWAS item is marked as stale and
 518          *               can be replaced by a newer one
 519          */
 520
 521         if (iter == whowas.end())
 522         {
 523                 if (whowas.size() >= (unsigned)WHOWAS_MAX)
 524                 {
 525                         for (whowas_hash::iterator i = whowas.begin(); i != whowas.end(); i++)
 526                         {
 527                                 // 3600 seconds in an hour ;)
 528                                 if ((i->second->signon)<(TIME-(WHOWAS_STALE*3600)))
 529                                 {
 530                                         // delete the old one
 531                                         if (i->second) delete i->second;
 532                                         // replace with new one
 533                                         i->second = a;
 534                                         log(DEBUG,"added WHOWAS entry, purged an old record");
 535                                         return;
 536                                 }
 537                         }
 538                         // no space left and user doesnt exist. Don't leave ram in use!
 539                         log(DEBUG,"Not able to update whowas (list at WHOWAS_MAX entries and trying to add new?), freeing excess ram");
 540                         delete a;
 541                 }
 542                 else
 543                 {
 544                         log(DEBUG,"added fresh WHOWAS entry");
 545                         whowas[a->nick] = a;
 546                 }
 547         }
 548         else
 549         {
 550                 log(DEBUG,"updated WHOWAS entry");
 551                 if (iter->second) delete iter->second;
 552                 iter->second = a;
 553         }
 554 }
 555
 556 /* add a client connection to the sockets list */
 557 void AddClient(int socket, int port, bool iscached, in_addr ip4)
 558 {
 559         string tempnick;
 560         char tn2[MAXBUF];
 561         user_hash::iterator iter;
 562
 563         tempnick = ConvToStr(socket) + "-unknown";
 564         sprintf(tn2,"%d-unknown",socket);
 565
 566         iter = clientlist.find(tempnick);
 567
 568         // fix by brain.
 569         // as these nicknames are 'RFC impossible', we can be sure nobody is going to be
 570         // using one as a registered connection. As theyre per fd, we can also safely assume
 571         // that we wont have collisions. Therefore, if the nick exists in the list, its only
 572         // used by a dead socket, erase the iterator so that the new client may reclaim it.
 573         // this was probably the cause of 'server ignores me when i hammer it with reconnects'
 574         // issue in earlier alphas/betas
 575         if (iter != clientlist.end())
 576         {
 577                 userrec* goner = iter->second;
 578                 delete goner;
 579                 clientlist.erase(iter);
 580         }
 581
 582         /*
 583          * It is OK to access the value here this way since we know
 584          * it exists, we just created it above.
 585          *
 586          * At NO other time should you access a value in a map or a
 587          * hash_map this way.
 588          */
 589         clientlist[tempnick] = new userrec();
 590
 591         char *ipaddr = (char*)inet_ntoa(ip4);
 592
 593         log(DEBUG,"AddClient: %d %d %s",socket,port,ipaddr);
 594
 595         clientlist[tempnick]->fd = socket;
 596         strlcpy(clientlist[tempnick]->nick, tn2,NICKMAX);
 597         /* We don't know the host yet, dns lookup could still be going on,
 598          * so instead we just put the ip address here, for now.
 599          */
 600         strlcpy(clientlist[tempnick]->host, ipaddr, 160);
 601         strlcpy(clientlist[tempnick]->dhost, ipaddr, 160);
 602         clientlist[tempnick]->server = (char*)FindServerNamePtr(Config->ServerName);
 603         strlcpy(clientlist[tempnick]->ident, "unknown",IDENTMAX);
 604         clientlist[tempnick]->registered = 0;
 605         clientlist[tempnick]->signon = TIME + Config->dns_timeout;
 606         clientlist[tempnick]->lastping = 1;
 607         clientlist[tempnick]->ip4 = ip4;
 608         clientlist[tempnick]->port = port;
 609
 610         // set the registration timeout for this user
 611         unsigned long class_regtimeout = 90;
 612         int class_flood = 0;
 613         long class_threshold = 5;
 614         long class_sqmax = 262144;      // 256kb
 615         long class_rqmax = 4096;        // 4k
 616
 617         for (ClassVector::iterator i = Config->Classes.begin(); i != Config->Classes.end(); i++)
 618         {
 619                 if (match(ipaddr,i->host.c_str()) && (i->type == CC_ALLOW))
 620                 {
 621                         class_regtimeout = (unsigned long)i->registration_timeout;
 622                         class_flood = i->flood;
 623                         clientlist[tempnick]->pingmax = i->pingtime;
 624                         class_threshold = i->threshold;
 625                         class_sqmax = i->sendqmax;
 626                         class_rqmax = i->recvqmax;
 627                         break;
 628                 }
 629         }
 630
 631         clientlist[tempnick]->nping = TIME+clientlist[tempnick]->pingmax + Config->dns_timeout;
 632         clientlist[tempnick]->timeout = TIME+class_regtimeout;
 633         clientlist[tempnick]->flood = class_flood;
 634         clientlist[tempnick]->threshold = class_threshold;
 635         clientlist[tempnick]->sendqmax = class_sqmax;
 636         clientlist[tempnick]->recvqmax = class_rqmax;
 637
 638         ucrec a;
 639         a.channel = NULL;
 640         a.uc_modes = 0;
 641         for (int i = 0; i < MAXCHANS; i++)
 642                 clientlist[tempnick]->chans.push_back(a);
 643
 644         if (local_users.size() > Config->SoftLimit)
 645         {
 646                 kill_link(clientlist[tempnick],"No more connections allowed");
 647                 return;
 648         }
 649
 650         if (local_users.size() >= MAXCLIENTS)
 651         {
 652                 kill_link(clientlist[tempnick],"No more connections allowed");
 653                 return;
 654         }
 655
 656         // this is done as a safety check to keep the file descriptors within range of fd_ref_table.
 657         // its a pretty big but for the moment valid assumption:
 658         // file descriptors are handed out starting at 0, and are recycled as theyre freed.
 659         // therefore if there is ever an fd over 65535, 65536 clients must be connected to the
 660         // irc server at once (or the irc server otherwise initiating this many connections, files etc)
 661         // which for the time being is a physical impossibility (even the largest networks dont have more
 662         // than about 10,000 users on ONE server!)
 663         if ((unsigned)socket > MAX_DESCRIPTORS)
 664         {
 665                 kill_link(clientlist[tempnick],"Server is full");
 666                 return;
 667         }
 668         char* e = matches_exception(ipaddr);
 669         if (!e)
 670         {
 671                 char* r = matches_zline(ipaddr);
 672                 if (r)
 673                 {
 674                         char reason[MAXBUF];
 675                         snprintf(reason,MAXBUF,"Z-Lined: %s",r);
 676                         kill_link(clientlist[tempnick],reason);
 677                         return;
 678                 }
 679         }
 680         fd_ref_table[socket] = clientlist[tempnick];
 681         local_users.push_back(clientlist[tempnick]);
 682         ServerInstance->SE->AddFd(socket,true,X_ESTAB_CLIENT);
 683
 684         WriteServ(clientlist[tempnick]->fd,"NOTICE Auth :*** Looking up your hostname...");
 685 }
 686
 687 long FindMatchingGlobal(userrec* user)
 688 {
 689         long x = 0;
 690         for (user_hash::const_iterator a = clientlist.begin(); a != clientlist.end(); a++)
 691         {
 692                 if (a->second->ip4.s_addr == user->ip4.s_addr)
 693                         x++;
 694         }
 695         return x;
 696 }
 697
 698 long FindMatchingLocal(userrec* user)
 699 {
 700         long x = 0;
 701         for (std::vector<userrec*>::const_iterator a = local_users.begin(); a != local_users.end(); a++)
 702         {
 703                 userrec* comp = (userrec*)(*a);
 704                 if (comp->ip4.s_addr == user->ip4.s_addr)
 705                         x++;
 706         }
 707         return x;
 708 }
 709
 710 void FullConnectUser(userrec* user, CullList* Goners)
 711 {
 712         ServerInstance->stats->statsConnects++;
 713         user->idle_lastmsg = TIME;
 714         log(DEBUG,"ConnectUser: %s",user->nick);
 715
 716         ConnectClass a = GetClass(user);
 717
 718         if (a.type == CC_DENY)
 719         {
 720                 Goners->AddItem(user,"Unauthorised connection");
 721                 return;
 722         }
 723         if ((*(a.pass.c_str())) && (!user->haspassed))
 724         {
 725                 Goners->AddItem(user,"Invalid password");
 726                 return;
 727         }
 728         if (FindMatchingLocal(user) > a.maxlocal)
 729         {
 730                 Goners->AddItem(user,"No more connections allowed from your host via this connect class (local)");
 731                 return;
 732         }
 733         if (FindMatchingGlobal(user) > a.maxglobal)
 734         {
 735                 Goners->AddItem(user,"No more connections allowed from your host via this connect class (global)");
 736                 return;
 737         }
 738
 739         char match_against[MAXBUF];
 740         snprintf(match_against,MAXBUF,"%s@%s",user->ident,user->host);
 741         char* e = matches_exception(match_against);
 742         if (!e)
 743         {
 744                 char* r = matches_gline(match_against);
 745                 if (r)
 746                 {
 747                         char reason[MAXBUF];
 748                         snprintf(reason,MAXBUF,"G-Lined: %s",r);
 749                         Goners->AddItem(user,reason);
 750                         return;
 751                 }
 752                 r = matches_kline(user->host);
 753                 if (r)
 754                 {
 755                         char reason[MAXBUF];
 756                         snprintf(reason,MAXBUF,"K-Lined: %s",r);
 757                         Goners->AddItem(user,reason);
 758                         return;
 759                 }
 760         }
 761
 762
 763         WriteServ(user->fd,"NOTICE Auth :Welcome to \002%s\002!",Config->Network);
 764         WriteServ(user->fd,"001 %s :Welcome to the %s IRC Network %s!%s@%s",user->nick,Config->Network,user->nick,user->ident,user->host);
 765         WriteServ(user->fd,"002 %s :Your host is %s, running version %s",user->nick,Config->ServerName,VERSION);
 766         WriteServ(user->fd,"003 %s :This server was created %s %s",user->nick,__TIME__,__DATE__);
 767         WriteServ(user->fd,"004 %s %s %s iowghrasxRVSCWBG lvhopsmntikrcaqbegIOLQRSKVHGCNT vhobeIaqglk",user->nick,Config->ServerName,VERSION);
 768         // anfl @ #ratbox, efnet reminded me that according to the RFC this cant contain more than 13 tokens per line...
 769         // so i'd better split it :)
 770         std::stringstream out(Config->data005);
 771         std::string token = "";
 772         std::string line5 = "";
 773         int token_counter = 0;
 774         while (!out.eof())
 775         {
 776                 out >> token;
 777                 line5 = line5 + token + " ";
 778                 token_counter++;
 779                 if ((token_counter >= 13) || (out.eof() == true))
 780                 {
 781                         WriteServ(user->fd,"005 %s %s:are supported by this server",user->nick,line5.c_str());
 782                         line5 = "";
 783                         token_counter = 0;
 784                 }
 785         }
 786         ShowMOTD(user);
 787
 788         // fix 3 by brain, move registered = 7 below these so that spurious modes and host changes dont go out
 789         // onto the network and produce 'fake direction'
 790         FOREACH_MOD(I_OnUserConnect,OnUserConnect(user));
 791         FOREACH_MOD(I_OnGlobalConnect,OnGlobalConnect(user));
 792         user->registered = 7;
 793         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));
 794 }
 795
 796 /* re-allocates a nick in the user_hash after they change nicknames,
 797  * returns a pointer to the new user as it may have moved */
 798
 799 userrec* ReHashNick(char* Old, char* New)
 800 {
 801         //user_hash::iterator newnick;
 802         user_hash::iterator oldnick = clientlist.find(Old);
 803
 804         log(DEBUG,"ReHashNick: %s %s",Old,New);
 805
 806         if (!strcasecmp(Old,New))
 807         {
 808                 log(DEBUG,"old nick is new nick, skipping");
 809                 return oldnick->second;
 810         }
 811
 812         if (oldnick == clientlist.end()) return NULL; /* doesnt exist */
 813
 814         log(DEBUG,"ReHashNick: Found hashed nick %s",Old);
 815
 816         userrec* olduser = oldnick->second;
 817         clientlist[New] = olduser;
 818         clientlist.erase(oldnick);
 819
 820         log(DEBUG,"ReHashNick: Nick rehashed as %s",New);
 821
 822         return clientlist[New];
 823 }
 824
 825 void force_nickchange(userrec* user,const char* newnick)
 826 {
 827         char nick[MAXBUF];
 828         int MOD_RESULT = 0;
 829
 830         *nick = 0;
 831
 832         FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(user,newnick));
 833         if (MOD_RESULT) {
 834                 ServerInstance->stats->statsCollisions++;
 835                 kill_link(user,"Nickname collision");
 836                 return;
 837         }
 838         if (matches_qline(newnick))
 839         {
 840                 ServerInstance->stats->statsCollisions++;
 841                 kill_link(user,"Nickname collision");
 842                 return;
 843         }
 844
 845         if (user)
 846         {
 847                 if (newnick)
 848                 {
 849                         strlcpy(nick,newnick,MAXBUF);
 850                 }
 851                 if (user->registered == 7)
 852                 {
 853                         char* pars[1];
 854                         pars[0] = nick;
 855                         std::string cmd = "NICK";
 856                         ServerInstance->Parser->CallHandler(cmd,pars,1,user);
 857                 }
 858         }
 859 }
 860