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 #include "inspstring.h"
  25 #include "commands.h"
  26 #include "helperfuncs.h"
  27 #include "typedefs.h"
  28 #include "socketengine.h"
  29 #include "hashcomp.h"
  30 #include "message.h"
  31 #include "wildcard.h"
  32 #include "xline.h"
  33 #include "cull_list.h"
  34
  35 extern InspIRCd* ServerInstance;
  36 extern int WHOWAS_STALE;
  37 extern int WHOWAS_MAX;
  38 extern std::vector<Module*> modules;
  39 extern std::vector<ircd_module*> factory;
  40 extern std::vector<InspSocket*> module_sockets;
  41 extern int MODCOUNT;
  42 extern InspSocket* socket_ref[MAX_DESCRIPTORS];
  43 extern time_t TIME;
  44 extern userrec* fd_ref_table[MAX_DESCRIPTORS];
  45 extern ServerConfig *Config;
  46 extern user_hash clientlist;
  47 extern Server* MyServer;
  48
  49 whowas_users whowas;
  50
  51 extern std::vector<userrec*> local_users;
  52
  53 std::vector<userrec*> all_opers;
  54
  55 typedef std::map<irc::string,char*> opertype_t;
  56 typedef opertype_t operclass_t;
  57
  58 opertype_t opertypes;
  59 operclass_t operclass;
  60
  61 bool InitTypes(const char* tag)
  62 {
  63         for (opertype_t::iterator n = opertypes.begin(); n != opertypes.end(); n++)
  64         {
  65                 if (n->second)
  66                         delete[] n->second;
  67         }
  68
  69         opertypes.clear();
  70         return true;
  71 }
  72
  73 bool InitClasses(const char* tag)
  74 {
  75         for (operclass_t::iterator n = operclass.begin(); n != operclass.end(); n++)
  76         {
  77                 if (n->second)
  78                         delete[] n->second;
  79         }
  80
  81         operclass.clear();
  82         return true;
  83 }
  84
  85 bool DoType(const char* tag, char** entries, void** values, int* types)
  86 {
  87         char* TypeName = (char*)values[0];
  88         char* Classes = (char*)values[1];
  89
  90         opertypes[TypeName] = strdup(Classes);
  91         log(DEBUG,"Read oper TYPE '%s' with classes '%s'",TypeName,Classes);
  92         return true;
  93 }
  94
  95 bool DoClass(const char* tag, char** entries, void** values, int* types)
  96 {
  97         char* ClassName = (char*)values[0];
  98         char* CommandList = (char*)values[1];
  99
 100         operclass[ClassName] = strdup(CommandList);
 101         log(DEBUG,"Read oper CLASS '%s' with commands '%s'",ClassName,CommandList);
 102         return true;
 103 }
 104
 105 bool DoneClassesAndTypes(const char* tag)
 106 {
 107         return true;
 108 }
 109
 110 bool userrec::ProcessNoticeMasks(const char *sm)
 111 {
 112         bool adding = true;
 113         const char *c = sm;
 114
 115         while (c && *c)
 116         {
 117                 switch (*c)
 118                 {
 119                         case '+':
 120                                 adding = true;
 121                                 break;
 122                         case '-':
 123                                 adding = false;
 124                                 break;
 125                         default:
 126                                 if ((*c >= 'A') && (*c <= 'z'))
 127                                         this->SetNoticeMask(*c, adding);
 128                                 break;
 129                 }
 130
 131                 *c++;
 132         }
 133
 134         return true;
 135 }
 136
 137 void userrec::StartDNSLookup()
 138 {
 139         log(DEBUG,"Commencing reverse lookup");
 140         try
 141         {
 142                 res_reverse = new UserResolver(this, insp_ntoa(this->ip4), false);
 143                 MyServer->AddResolver(res_reverse);
 144         }
 145         catch (ModuleException& e)
 146         {
 147                 log(DEBUG,"Error in resolver: %s",e.GetReason());
 148         }
 149 }
 150
 151 UserResolver::UserResolver(userrec* user, std::string to_resolve, bool forward) : Resolver(to_resolve, forward), bound_user(user)
 152 {
 153         this->bound_fd = user->fd;
 154 }
 155
 156 void UserResolver::OnLookupComplete(const std::string &result)
 157 {
 158         if ((!this->fwd) && (fd_ref_table[this->bound_fd] == this->bound_user))
 159         {
 160                 log(DEBUG,"Commencing forward lookup");
 161                 this->bound_user->stored_host = result;
 162                 try
 163                 {
 164                         bound_user->res_forward = new UserResolver(this->bound_user, result, true);
 165                         MyServer->AddResolver(bound_user->res_forward);
 166                 }
 167                 catch (ModuleException& e)
 168                 {
 169                         log(DEBUG,"Error in resolver: %s",e.GetReason());
 170                 }
 171         }
 172         else if ((this->fwd) && (fd_ref_table[this->bound_fd] == this->bound_user))
 173         {
 174                 /* Both lookups completed */
 175                 if (insp_ntoa(this->bound_user->ip4) == result)
 176                 {
 177                         std::string hostname = this->bound_user->stored_host;
 178                         if (hostname.length() < 65)
 179                         {
 180                                 WriteServ(this->bound_fd, "NOTICE Auth :*** Found your hostname (%s)", this->bound_user->stored_host.c_str());
 181                                 this->bound_user->dns_done = true;
 182                                 strlcpy(this->bound_user->dhost, hostname.c_str(),64);
 183                                 strlcpy(this->bound_user->host, hostname.c_str(),64);
 184                         }
 185                         else
 186                         {
 187                                 WriteServ(this->bound_fd, "NOTICE Auth :*** Your hostname is longer than the maximum of 64 characters, using your IP address (%s) instead.", insp_ntoa(this->bound_user->ip4));
 188                         }
 189                 }
 190                 else
 191                 {
 192                         WriteServ(this->bound_fd, "NOTICE Auth :*** Your hostname does not match up with your IP address. Sorry, using your IP address (%s) instead.", insp_ntoa(this->bound_user->ip4));
 193                 }
 194         }
 195 }
 196
 197 void UserResolver::OnError(ResolverError e, const std::string &errormessage)
 198 {
 199         if (fd_ref_table[this->bound_fd] == this->bound_user)
 200         {
 201                 /* Error message here */
 202                 WriteServ(this->bound_fd, "NOTICE Auth :*** Could not resolve your hostname, using your IP address (%s) instead.", insp_ntoa(this->bound_user->ip4));
 203                 this->bound_user->dns_done = true;
 204         }
 205 }
 206
 207
 208 bool userrec::IsNoticeMaskSet(unsigned char sm)
 209 {
 210         return (snomasks[sm-65]);
 211 }
 212
 213 void userrec::SetNoticeMask(unsigned char sm, bool value)
 214 {
 215         snomasks[sm-65] = value;
 216 }
 217
 218 const char* userrec::FormatNoticeMasks()
 219 {
 220         static char data[MAXBUF];
 221         int offset = 0;
 222
 223         for (int n = 0; n < 64; n++)
 224         {
 225                 if (snomasks[n])
 226                         data[offset++] = n+65;
 227         }
 228
 229         data[offset] = 0;
 230         return data;
 231 }
 232
 233
 234
 235 bool userrec::IsModeSet(unsigned char m)
 236 {
 237         return (modes[m-65]);
 238 }
 239
 240 void userrec::SetMode(unsigned char m, bool value)
 241 {
 242         modes[m-65] = value;
 243 }
 244
 245 const char* userrec::FormatModes()
 246 {
 247         static char data[MAXBUF];
 248         int offset = 0;
 249         for (int n = 0; n < 64; n++)
 250         {
 251                 if (modes[n])
 252                         data[offset++] = n+65;
 253         }
 254         data[offset] = 0;
 255         return data;
 256 }
 257
 258 userrec::userrec()
 259 {
 260         // the PROPER way to do it, AVOID bzero at *ALL* costs
 261         *password = *nick = *ident = *host = *dhost = *fullname = *awaymsg = *oper = 0;
 262         server = (char*)FindServerNamePtr(Config->ServerName);
 263         reset_due = TIME;
 264         lines_in = fd = lastping = signon = idle_lastmsg = nping = registered = 0;
 265         timeout = flood = port = bytes_in = bytes_out = cmds_in = cmds_out = 0;
 266         haspassed = dns_done = false;
 267         recvq = "";
 268         sendq = "";
 269         res_forward = res_reverse = NULL;
 270         chans.clear();
 271         invites.clear();
 272         chans.resize(MAXCHANS);
 273         memset(modes,0,sizeof(modes));
 274
 275         for (unsigned int n = 0; n < MAXCHANS; n++)
 276         {
 277                 ucrec* x = new ucrec();
 278                 chans[n] = x;
 279                 x->channel = NULL;
 280                 x->uc_modes = 0;
 281         }
 282 }
 283
 284 userrec::~userrec()
 285 {
 286         for (std::vector<ucrec*>::iterator n = chans.begin(); n != chans.end(); n++)
 287         {
 288                 ucrec* x = (ucrec*)*n;
 289                 delete x;
 290         }
 291 }
 292
 293 /* XXX - minor point, other *Host functions return a char *, this one creates it. Might be nice to be consistant? */
 294 void userrec::MakeHost(char* nhost)
 295 {
 296         /* This is much faster than snprintf */
 297         char* t = nhost;
 298         for(char* n = ident; *n; n++)
 299                 *t++ = *n;
 300         *t++ = '@';
 301         for(char* n = host; *n; n++)
 302                 *t++ = *n;
 303         *t = 0;
 304 }
 305
 306 void userrec::CloseSocket()
 307 {
 308         shutdown(this->fd,2);
 309         close(this->fd);
 310 }
 311
 312 char* userrec::GetFullHost()
 313 {
 314         static char result[MAXBUF];
 315         char* t = result;
 316         for(char* n = nick; *n; n++)
 317                 *t++ = *n;
 318         *t++ = '!';
 319         for(char* n = ident; *n; n++)
 320                 *t++ = *n;
 321         *t++ = '@';
 322         for(char* n = dhost; *n; n++)
 323                 *t++ = *n;
 324         *t = 0;
 325         return result;
 326 }
 327
 328 char* userrec::MakeWildHost()
 329 {
 330         static char nresult[MAXBUF];
 331         char* t = nresult;
 332         *t++ = '*';     *t++ = '!';
 333         *t++ = '*';     *t++ = '@';
 334         for(char* n = dhost; *n; n++)
 335                 *t++ = *n;
 336         *t = 0;
 337         return nresult;
 338 }
 339
 340 int userrec::ReadData(void* buffer, size_t size)
 341 {
 342         if (this->fd > -1)
 343         {
 344                 return read(this->fd, buffer, size);
 345         }
 346         else
 347                 return 0;
 348 }
 349
 350
 351 char* userrec::GetFullRealHost()
 352 {
 353         static char fresult[MAXBUF];
 354         char* t = fresult;
 355         for(char* n = nick; *n; n++)
 356                 *t++ = *n;
 357         *t++ = '!';
 358         for(char* n = ident; *n; n++)
 359                 *t++ = *n;
 360         *t++ = '@';
 361         for(char* n = host; *n; n++)
 362                 *t++ = *n;
 363         *t = 0;
 364         return fresult;
 365 }
 366
 367 bool userrec::IsInvited(irc::string &channel)
 368 {
 369         for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 370         {
 371                 irc::string compare = i->channel;
 372
 373                 if (compare == channel)
 374                 {
 375                         return true;
 376                 }
 377         }
 378         return false;
 379 }
 380
 381 InvitedList* userrec::GetInviteList()
 382 {
 383         return &invites;
 384 }
 385
 386 void userrec::InviteTo(irc::string &channel)
 387 {
 388         Invited i;
 389         i.channel = channel;
 390         invites.push_back(i);
 391 }
 392
 393 void userrec::RemoveInvite(irc::string &channel)
 394 {
 395         log(DEBUG,"Removing invites");
 396
 397         if (invites.size())
 398         {
 399                 for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 400                 {
 401                         irc::string compare = i->channel;
 402
 403                         if (compare == channel)
 404                         {
 405                                 invites.erase(i);
 406                                 return;
 407                         }
 408                 }
 409         }
 410 }
 411
 412 bool userrec::HasPermission(const std::string &command)
 413 {
 414         char* mycmd;
 415         char* savept;
 416         char* savept2;
 417
 418         /*
 419          * users on remote servers can completely bypass all permissions based checks.
 420          * This prevents desyncs when one server has different type/class tags to another.
 421          * That having been said, this does open things up to the possibility of source changes
 422          * allowing remote kills, etc - but if they have access to the src, they most likely have
 423          * access to the conf - so it's an end to a means either way.
 424          */
 425         if (!IS_LOCAL(this))
 426                 return true;
 427
 428         // are they even an oper at all?
 429         if (*this->oper)
 430         {
 431                 opertype_t::iterator iter_opertype = opertypes.find(this->oper);
 432                 if (iter_opertype != opertypes.end())
 433                 {
 434                         char* Classes = strdup(iter_opertype->second);
 435                         char* myclass = strtok_r(Classes," ",&savept);
 436                         while (myclass)
 437                         {
 438                                 operclass_t::iterator iter_operclass = operclass.find(myclass);
 439                                 if (iter_operclass != operclass.end())
 440                                 {
 441                                         char* CommandList = strdup(iter_operclass->second);
 442                                         mycmd = strtok_r(CommandList," ",&savept2);
 443                                         while (mycmd)
 444                                         {
 445                                                 if ((!strcasecmp(mycmd,command.c_str())) || (*mycmd == '*'))
 446                                                 {
 447                                                         free(Classes);
 448                                                         free(CommandList);
 449                                                         return true;
 450                                                 }
 451                                                 mycmd = strtok_r(NULL," ",&savept2);
 452                                         }
 453                                         free(CommandList);
 454                                 }
 455                                 myclass = strtok_r(NULL," ",&savept);
 456                         }
 457                         free(Classes);
 458                 }
 459         }
 460         return false;
 461 }
 462
 463
 464 bool userrec::AddBuffer(const std::string &a)
 465 {
 466         std::string b = "";
 467
 468         /* NB: std::string is arsey about \r and \n and tries to translate them
 469          * somehow, so we CANNOT use std::string::find() here :(
 470          */
 471         for (std::string::const_iterator i = a.begin(); i != a.end(); i++)
 472         {
 473                 if (*i != '\r')
 474                         b += *i;
 475         }
 476
 477         if (b.length())
 478                 recvq.append(b);
 479
 480         if (recvq.length() > (unsigned)this->recvqmax)
 481         {
 482                 this->SetWriteError("RecvQ exceeded");
 483                 WriteOpers("*** User %s RecvQ of %d exceeds connect class maximum of %d",this->nick,recvq.length(),this->recvqmax);
 484                 return false;
 485         }
 486
 487         return true;
 488 }
 489
 490 bool userrec::BufferIsReady()
 491 {
 492         return (recvq.find('\n') != std::string::npos);
 493 }
 494
 495 void userrec::ClearBuffer()
 496 {
 497         recvq = "";
 498 }
 499
 500 std::string userrec::GetBuffer()
 501 {
 502         if (!recvq.length())
 503                 return "";
 504
 505         /* Strip any leading \r or \n off the string.
 506          * Usually there are only one or two of these,
 507          * so its is computationally cheap to do.
 508          */
 509         while ((*recvq.begin() == '\r') || (*recvq.begin() == '\n'))
 510                 recvq.erase(recvq.begin());
 511
 512         for (std::string::iterator x = recvq.begin(); x != recvq.end(); x++)
 513         {
 514                 /* Find the first complete line, return it as the
 515                  * result, and leave the recvq as whats left
 516                  */
 517                 if (*x == '\n')
 518                 {
 519                         std::string ret = std::string(recvq.begin(), x);
 520                         recvq.erase(recvq.begin(), x + 1);
 521                         return ret;
 522                 }
 523         }
 524         return "";
 525 }
 526
 527 void userrec::AddWriteBuf(const std::string &data)
 528 {
 529         if (*this->GetWriteError())
 530                 return;
 531
 532         if (sendq.length() + data.length() > (unsigned)this->sendqmax)
 533         {
 534                 /*
 535                  * Fix by brain - Set the error text BEFORE calling writeopers, because
 536                  * if we dont it'll recursively  call here over and over again trying
 537                  * to repeatedly add the text to the sendq!
 538                  */
 539                 this->SetWriteError("SendQ exceeded");
 540                 WriteOpers("*** User %s SendQ of %d exceeds connect class maximum of %d",this->nick,sendq.length() + data.length(),this->sendqmax);
 541                 return;
 542         }
 543
 544         if (data.length() > 512)
 545         {
 546                 std::string newdata(data);
 547                 newdata.resize(510);
 548                 newdata.append("\r\n");
 549                 sendq.append(newdata);
 550         }
 551         else
 552         {
 553                 sendq.append(data);
 554         }
 555 }
 556
 557 // send AS MUCH OF THE USERS SENDQ as we are able to (might not be all of it)
 558 void userrec::FlushWriteBuf()
 559 {
 560         if ((sendq.length()) && (this->fd != FD_MAGIC_NUMBER))
 561         {
 562                 const char* tb = this->sendq.c_str();
 563                 int n_sent = write(this->fd,tb,this->sendq.length());
 564                 if (n_sent == -1)
 565                 {
 566                         if (errno != EAGAIN)
 567                                 this->SetWriteError(strerror(errno));
 568                 }
 569                 else
 570                 {
 571                         // advance the queue
 572                         tb += n_sent;
 573                         this->sendq = tb;
 574                         // update the user's stats counters
 575                         this->bytes_out += n_sent;
 576                         this->cmds_out++;
 577                 }
 578         }
 579 }
 580
 581 void userrec::SetWriteError(const std::string &error)
 582 {
 583         // don't try to set the error twice, its already set take the first string.
 584         if (!this->WriteError.length())
 585         {
 586                 log(DEBUG,"Setting error string for %s to '%s'",this->nick,error.c_str());
 587                 this->WriteError = error;
 588         }
 589 }
 590
 591 const char* userrec::GetWriteError()
 592 {
 593         return this->WriteError.c_str();
 594 }
 595
 596 void AddOper(userrec* user)
 597 {
 598         log(DEBUG,"Oper added to optimization list");
 599         all_opers.push_back(user);
 600 }
 601
 602 void DeleteOper(userrec* user)
 603 {
 604         for (std::vector<userrec*>::iterator a = all_opers.begin(); a < all_opers.end(); a++)
 605         {
 606                 if (*a == user)
 607                 {
 608                         log(DEBUG,"Oper removed from optimization list");
 609                         all_opers.erase(a);
 610                         return;
 611                 }
 612         }
 613 }
 614
 615 void kill_link(userrec *user,const char* r)
 616 {
 617         user_hash::iterator iter = clientlist.find(user->nick);
 618
 619 /*
 620  * I'm pretty sure returning here is causing a desync when part of the net thinks a user is gone,
 621  * and another part doesn't. We want to broadcast the quit/kill before bailing so the net stays in sync.
 622  *
 623  * I can't imagine this blowing up, so I'm commenting it out. We still check
 624  * before playing with a bad iterator below in our if(). DISCUSS THIS BEFORE YOU DO ANYTHING. --w00t
 625  *
 626  *      if (iter == clientlist.end())
 627  *              return;
 628  */
 629
 630         char reason[MAXBUF];
 631
 632         strlcpy(reason,r,MAXQUIT-1);
 633         log(DEBUG,"kill_link: %s %d '%s'",user->nick,user->fd,reason);
 634
 635         if (IS_LOCAL(user))
 636                 Write(user->fd,"ERROR :Closing link (%s@%s) [%s]",user->ident,user->host,reason);
 637
 638         if (user->registered == REG_ALL)
 639         {
 640                 purge_empty_chans(user);
 641                 FOREACH_MOD(I_OnUserQuit,OnUserQuit(user,reason));
 642                 WriteCommonExcept(user,"QUIT :%s",reason);
 643         }
 644
 645         if (IS_LOCAL(user))
 646                 user->FlushWriteBuf();
 647
 648         FOREACH_MOD(I_OnUserDisconnect,OnUserDisconnect(user));
 649
 650         if (IS_LOCAL(user))
 651         {
 652                 if (Config->GetIOHook(user->port))
 653                 {
 654                         try
 655                         {
 656                                 Config->GetIOHook(user->port)->OnRawSocketClose(user->fd);
 657                         }
 658                         catch (ModuleException& modexcept)
 659                         {
 660                                 log(DEBUG,"Module exception cought: %s",modexcept.GetReason());
 661                         }
 662                 }
 663
 664                 ServerInstance->SE->DelFd(user->fd);
 665                 user->CloseSocket();
 666         }
 667
 668         /*
 669          * this must come before the WriteOpers so that it doesnt try to fill their buffer with anything
 670          * if they were an oper with +s.
 671          *
 672          * XXX -
 673          * In the current implementation, we only show local quits, as we only show local connects. With
 674          * the proposed implmentation of snomasks however, this will likely change in the (near?) future.
 675          */
 676         if (user->registered == REG_ALL)
 677         {
 678                 if (IS_LOCAL(user))
 679                         WriteOpers("*** Client exiting: %s!%s@%s [%s]",user->nick,user->ident,user->host,reason);
 680                 AddWhoWas(user);
 681         }
 682
 683         if (iter != clientlist.end())
 684         {
 685                 log(DEBUG,"deleting user hash value %lx",(unsigned long)user);
 686                 if (IS_LOCAL(user))
 687                 {
 688                         fd_ref_table[user->fd] = NULL;
 689                         if (find(local_users.begin(),local_users.end(),user) != local_users.end())
 690                         {
 691                                 local_users.erase(find(local_users.begin(),local_users.end(),user));
 692                                 log(DEBUG,"Delete local user");
 693                         }
 694                 }
 695                 clientlist.erase(iter);
 696                 DELETE(user);
 697         }
 698 }
 699
 700 WhoWasGroup::WhoWasGroup(userrec* user) : host(NULL), dhost(NULL), ident(NULL), server(NULL), gecos(NULL), signon(user->signon)
 701 {
 702         this->host = strdup(user->host);
 703         this->dhost = strdup(user->dhost);
 704         this->ident = strdup(user->ident);
 705         this->server = user->server;
 706         this->gecos = strdup(user->fullname);
 707 }
 708
 709 WhoWasGroup::~WhoWasGroup()
 710 {
 711         if (host)
 712                 free(host);
 713         if (dhost)
 714                 free(dhost);
 715         if (ident)
 716                 free(ident);
 717         if (gecos)
 718                 free(gecos);
 719 }
 720
 721 /* adds or updates an entry in the whowas list */
 722 void AddWhoWas(userrec* u)
 723 {
 724         whowas_users::iterator iter = whowas.find(u->nick);
 725
 726         if (iter == whowas.end())
 727         {
 728                 whowas_set* n = new whowas_set;
 729                 WhoWasGroup *a = new WhoWasGroup(u);
 730                 n->push_back(a);
 731                 whowas[u->nick] = n;
 732         }
 733         else
 734         {
 735                 whowas_set* group = (whowas_set*)iter->second;
 736
 737                 if (group->size() > 10)
 738                 {
 739                         WhoWasGroup *a = (WhoWasGroup*)*(group->begin());
 740                         DELETE(a);
 741                         group->pop_front();
 742                 }
 743
 744                 WhoWasGroup *a = new WhoWasGroup(u);
 745                 group->push_back(a);
 746         }
 747 }
 748
 749 /* every hour, run this function which removes all entries over 3 days */
 750 void MaintainWhoWas(time_t TIME)
 751 {
 752         for (whowas_users::iterator iter = whowas.begin(); iter != whowas.end(); iter++)
 753         {
 754                 whowas_set* n = (whowas_set*)iter->second;
 755                 if (n->size())
 756                 {
 757                         while ((n->begin() != n->end()) && ((*n->begin())->signon < TIME - 259200)) // 3 days
 758                         {
 759                                 WhoWasGroup *a = *(n->begin());
 760                                 DELETE(a);
 761                                 n->erase(n->begin());
 762                         }
 763                 }
 764         }
 765 }
 766
 767 /* add a client connection to the sockets list */
 768 void AddClient(int socket, int port, bool iscached, insp_inaddr ip4)
 769 {
 770         std::string tempnick = ConvToStr(socket) + "-unknown";
 771         user_hash::iterator iter = clientlist.find(tempnick);
 772         const char *ipaddr = insp_ntoa(ip4);
 773         userrec* _new;
 774         int j = 0;
 775
 776         /*
 777          * fix by brain.
 778          * as these nicknames are 'RFC impossible', we can be sure nobody is going to be
 779          * using one as a registered connection. As they are per fd, we can also safely assume
 780          * that we wont have collisions. Therefore, if the nick exists in the list, its only
 781          * used by a dead socket, erase the iterator so that the new client may reclaim it.
 782          * this was probably the cause of 'server ignores me when i hammer it with reconnects'
 783          * issue in earlier alphas/betas
 784          */
 785         if (iter != clientlist.end())
 786         {
 787                 userrec* goner = iter->second;
 788                 DELETE(goner);
 789                 clientlist.erase(iter);
 790         }
 791
 792         log(DEBUG,"AddClient: %d %d %s",socket,port,ipaddr);
 793
 794         _new = new userrec();
 795         clientlist[tempnick] = _new;
 796         _new->fd = socket;
 797         strlcpy(_new->nick,tempnick.c_str(),NICKMAX-1);
 798
 799         /* Smarter than your average bear^H^H^H^Hset of strlcpys. */
 800         for (const char* temp = ipaddr; *temp && j < 64; temp++, j++)
 801                 _new->dhost[j] = _new->host[j] = *temp;
 802         _new->dhost[j] = _new->host[j] = 0;
 803
 804         _new->server = FindServerNamePtr(Config->ServerName);
 805         /* We don't need range checking here, we KNOW 'unknown\0' will fit into the ident field. */
 806         strcpy(_new->ident, "unknown");
 807
 808         _new->registered = REG_NONE;
 809         _new->signon = TIME + Config->dns_timeout;
 810         _new->lastping = 1;
 811         _new->ip4 = ip4;
 812         _new->port = port;
 813
 814         // set the registration timeout for this user
 815         unsigned long class_regtimeout = 90;
 816         int class_flood = 0;
 817         long class_threshold = 5;
 818         long class_sqmax = 262144;      // 256kb
 819         long class_rqmax = 4096;        // 4k
 820
 821         for (ClassVector::iterator i = Config->Classes.begin(); i != Config->Classes.end(); i++)
 822         {
 823                 if ((i->type == CC_ALLOW) && (match(ipaddr,i->host.c_str())))
 824                 {
 825                         class_regtimeout = (unsigned long)i->registration_timeout;
 826                         class_flood = i->flood;
 827                         _new->pingmax = i->pingtime;
 828                         class_threshold = i->threshold;
 829                         class_sqmax = i->sendqmax;
 830                         class_rqmax = i->recvqmax;
 831                         break;
 832                 }
 833         }
 834
 835         _new->nping = TIME + _new->pingmax + Config->dns_timeout;
 836         _new->timeout = TIME+class_regtimeout;
 837         _new->flood = class_flood;
 838         _new->threshold = class_threshold;
 839         _new->sendqmax = class_sqmax;
 840         _new->recvqmax = class_rqmax;
 841
 842         fd_ref_table[socket] = _new;
 843         local_users.push_back(_new);
 844
 845         if (local_users.size() > Config->SoftLimit)
 846         {
 847                 kill_link(_new,"No more connections allowed");
 848                 return;
 849         }
 850
 851         if (local_users.size() >= MAXCLIENTS)
 852         {
 853                 kill_link(_new,"No more connections allowed");
 854                 return;
 855         }
 856
 857         /*
 858          * XXX -
 859          * this is done as a safety check to keep the file descriptors within range of fd_ref_table.
 860          * its a pretty big but for the moment valid assumption:
 861          * file descriptors are handed out starting at 0, and are recycled as theyre freed.
 862          * therefore if there is ever an fd over 65535, 65536 clients must be connected to the
 863          * irc server at once (or the irc server otherwise initiating this many connections, files etc)
 864          * which for the time being is a physical impossibility (even the largest networks dont have more
 865          * than about 10,000 users on ONE server!)
 866          */
 867         if ((unsigned)socket >= MAX_DESCRIPTORS)
 868         {
 869                 kill_link(_new,"Server is full");
 870                 return;
 871         }
 872         char* e = matches_exception(ipaddr);
 873         if (!e)
 874         {
 875                 char* r = matches_zline(ipaddr);
 876                 if (r)
 877                 {
 878                         char reason[MAXBUF];
 879                         snprintf(reason,MAXBUF,"Z-Lined: %s",r);
 880                         kill_link(_new,reason);
 881                         return;
 882                 }
 883         }
 884
 885         if (socket > -1)
 886         {
 887                 ServerInstance->SE->AddFd(socket,true,X_ESTAB_CLIENT);
 888         }
 889
 890         WriteServ(_new->fd,"NOTICE Auth :*** Looking up your hostname...");
 891 }
 892
 893 long FindMatchingGlobal(userrec* user)
 894 {
 895         long x = 0;
 896         for (user_hash::const_iterator a = clientlist.begin(); a != clientlist.end(); a++)
 897         {
 898 #ifdef IPV6
 899                 /* I dont think theres any faster way of matching two ipv6 addresses than memcmp
 900                  * Let me know if you think of one.
 901                   */
 902                 if (!memcmp(a->second->ip4.s6_addr, user->ip4.s6_addr, sizeof(in6_addr)))
 903                         x++;
 904 #else
 905                 if (a->second->ip4.s_addr == user->ip4.s_addr)
 906                         x++;
 907 #endif
 908         }
 909         return x;
 910 }
 911
 912 long FindMatchingLocal(userrec* user)
 913 {
 914         long x = 0;
 915         for (std::vector<userrec*>::const_iterator a = local_users.begin(); a != local_users.end(); a++)
 916         {
 917                 userrec* comp = *a;
 918 #ifdef IPV6
 919                 /* I dont think theres any faster way of matching two ipv6 addresses than memcmp */
 920                 if (!memcmp(comp->ip4.s6_addr, user->ip4.s6_addr, sizeof(in6_addr)))
 921                         x++;
 922 #else
 923                 if (comp->ip4.s_addr == user->ip4.s_addr)
 924                         x++;
 925 #endif
 926         }
 927         return x;
 928 }
 929
 930 void FullConnectUser(userrec* user, CullList* Goners)
 931 {
 932         ServerInstance->stats->statsConnects++;
 933         user->idle_lastmsg = TIME;
 934         log(DEBUG,"ConnectUser: %s",user->nick);
 935
 936         ConnectClass a = GetClass(user);
 937
 938         if (a.type == CC_DENY)
 939         {
 940                 Goners->AddItem(user,"Unauthorised connection");
 941                 return;
 942         }
 943
 944         if ((*(a.pass.c_str())) && (!user->haspassed))
 945         {
 946                 Goners->AddItem(user,"Invalid password");
 947                 return;
 948         }
 949
 950         if (FindMatchingLocal(user) > a.maxlocal)
 951         {
 952                 Goners->AddItem(user,"No more connections allowed from your host via this connect class (local)");
 953                 WriteOpers("*** WARNING: maximum LOCAL connections (%ld) exceeded for IP %s",a.maxlocal,insp_ntoa(user->ip4));
 954                 return;
 955         }
 956         else if (FindMatchingGlobal(user) > a.maxglobal)
 957         {
 958                 Goners->AddItem(user,"No more connections allowed from your host via this connect class (global)");
 959                 WriteOpers("*** WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s",a.maxglobal,insp_ntoa(user->ip4));
 960                 return;
 961         }
 962
 963         char match_against[MAXBUF];
 964         snprintf(match_against,MAXBUF,"%s@%s",user->ident,user->host);
 965         char* e = matches_exception(match_against);
 966
 967         if (!e)
 968         {
 969                 char* r = matches_gline(match_against);
 970
 971                 if (r)
 972                 {
 973                         char reason[MAXBUF];
 974                         snprintf(reason,MAXBUF,"G-Lined: %s",r);
 975                         Goners->AddItem(user,reason);
 976                         return;
 977                 }
 978
 979                 r = matches_kline(match_against);
 980
 981                 if (r)
 982                 {
 983                         char reason[MAXBUF];
 984                         snprintf(reason,MAXBUF,"K-Lined: %s",r);
 985                         Goners->AddItem(user,reason);
 986                         return;
 987                 }
 988         }
 989
 990
 991         WriteServ(user->fd,"NOTICE Auth :Welcome to \002%s\002!",Config->Network);
 992         WriteServ(user->fd,"001 %s :Welcome to the %s IRC Network %s!%s@%s",user->nick,Config->Network,user->nick,user->ident,user->host);
 993         WriteServ(user->fd,"002 %s :Your host is %s, running version %s",user->nick,Config->ServerName,VERSION);
 994         WriteServ(user->fd,"003 %s :This server was created %s %s",user->nick,__TIME__,__DATE__);
 995         WriteServ(user->fd,"004 %s %s %s %s %s %s",user->nick,Config->ServerName,VERSION,ServerInstance->ModeGrok->UserModeList().c_str(),ServerInstance->ModeGrok->ChannelModeList().c_str(),+ServerInstance->ModeGrok->ParaModeList().c_str());
 996
 997         // anfl @ #ratbox, efnet reminded me that according to the RFC this cant contain more than 13 tokens per line...
 998         // so i'd better split it :)
 999         std::stringstream out(Config->data005);
1000         std::string token = "";
1001         std::string line5 = "";
1002         int token_counter = 0;
1003
1004         while (!out.eof())
1005         {
1006                 out >> token;
1007                 line5 = line5 + token + " ";
1008                 token_counter++;
1009
1010                 if ((token_counter >= 13) || (out.eof() == true))
1011                 {
1012                         WriteServ(user->fd,"005 %s %s:are supported by this server",user->nick,line5.c_str());
1013                         line5 = "";
1014                         token_counter = 0;
1015                 }
1016         }
1017
1018         ShowMOTD(user);
1019
1020         /*
1021          * fix 3 by brain, move registered = 7 below these so that spurious modes and host
1022          * changes dont go out onto the network and produce 'fake direction'.
1023          */
1024         FOREACH_MOD(I_OnUserConnect,OnUserConnect(user));
1025         FOREACH_MOD(I_OnGlobalConnect,OnGlobalConnect(user));
1026         user->registered = REG_ALL;
1027         WriteOpers("*** Client connecting on port %lu: %s!%s@%s [%s]",(unsigned long)user->port,user->nick,user->ident,user->host,insp_ntoa(user->ip4));
1028 }
1029
1030 /** ReHashNick()
1031  * re-allocates a nick in the user_hash after they change nicknames,
1032  * returns a pointer to the new user as it may have moved
1033  */
1034 userrec* ReHashNick(const char* Old, const char* New)
1035 {
1036         //user_hash::iterator newnick;
1037         user_hash::iterator oldnick = clientlist.find(Old);
1038
1039         log(DEBUG,"ReHashNick: %s %s",Old,New);
1040
1041         if (!strcasecmp(Old,New))
1042         {
1043                 log(DEBUG,"old nick is new nick, skipping");
1044                 return oldnick->second;
1045         }
1046
1047         if (oldnick == clientlist.end())
1048                 return NULL; /* doesnt exist */
1049
1050         log(DEBUG,"ReHashNick: Found hashed nick %s",Old);
1051
1052         userrec* olduser = oldnick->second;
1053         clientlist[New] = olduser;
1054         clientlist.erase(oldnick);
1055
1056         log(DEBUG,"ReHashNick: Nick rehashed as %s",New);
1057
1058         return clientlist[New];
1059 }
1060
1061 void force_nickchange(userrec* user,const char* newnick)
1062 {
1063         char nick[MAXBUF];
1064         int MOD_RESULT = 0;
1065
1066         *nick = 0;
1067
1068         FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(user,newnick));
1069
1070         if (MOD_RESULT)
1071         {
1072                 ServerInstance->stats->statsCollisions++;
1073                 kill_link(user,"Nickname collision");
1074                 return;
1075         }
1076
1077         if (matches_qline(newnick))
1078         {
1079                 ServerInstance->stats->statsCollisions++;
1080                 kill_link(user,"Nickname collision");
1081                 return;
1082         }
1083
1084         if (user)
1085         {
1086                 if (newnick)
1087                 {
1088                         strlcpy(nick,newnick,MAXBUF-1);
1089                 }
1090
1091                 if (user->registered == REG_ALL)
1092                 {
1093                         const char* pars[1];
1094                         pars[0] = nick;
1095                         std::string cmd = "NICK";
1096
1097                         ServerInstance->Parser->CallHandler(cmd,pars,1,user);
1098                 }
1099         }
1100 }