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, this->GetIPString(), 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 ? DNS_QUERY_FORWARD : DNS_QUERY_REVERSE), bound_user(user)
 152 {
 153         this->fwd = forward;
 154         this->bound_fd = user->fd;
 155 }
 156
 157 void UserResolver::OnLookupComplete(const std::string &result)
 158 {
 159         if ((!this->fwd) && (fd_ref_table[this->bound_fd] == this->bound_user))
 160         {
 161                 log(DEBUG,"Commencing forward lookup");
 162                 this->bound_user->stored_host = result;
 163                 try
 164                 {
 165                         bound_user->res_forward = new UserResolver(this->bound_user, result, true);
 166                         MyServer->AddResolver(bound_user->res_forward);
 167                 }
 168                 catch (ModuleException& e)
 169                 {
 170                         log(DEBUG,"Error in resolver: %s",e.GetReason());
 171                 }
 172         }
 173         else if ((this->fwd) && (fd_ref_table[this->bound_fd] == this->bound_user))
 174         {
 175                 /* Both lookups completed */
 176                 if (this->bound_user->GetIPString() == result)
 177                 {
 178                         std::string hostname = this->bound_user->stored_host;
 179                         if (hostname.length() < 65)
 180                         {
 181                                 /* Hostnames starting with : are not a good thing (tm) */
 182                                 if (*(hostname.c_str()) == ':')
 183                                         hostname = "0" + hostname;
 184
 185                                 WriteServ(this->bound_fd, "NOTICE Auth :*** Found your hostname (%s)", hostname.c_str());
 186                                 this->bound_user->dns_done = true;
 187                                 strlcpy(this->bound_user->dhost, hostname.c_str(),64);
 188                                 strlcpy(this->bound_user->host, hostname.c_str(),64);
 189                         }
 190                         else
 191                         {
 192                                 WriteServ(this->bound_fd, "NOTICE Auth :*** Your hostname is longer than the maximum of 64 characters, using your IP address (%s) instead.", this->bound_user->GetIPString());
 193                         }
 194                 }
 195                 else
 196                 {
 197                         WriteServ(this->bound_fd, "NOTICE Auth :*** Your hostname does not match up with your IP address. Sorry, using your IP address (%s) instead.", this->bound_user->GetIPString());
 198                 }
 199         }
 200 }
 201
 202 void UserResolver::OnError(ResolverError e, const std::string &errormessage)
 203 {
 204         if (fd_ref_table[this->bound_fd] == this->bound_user)
 205         {
 206                 /* Error message here */
 207                 WriteServ(this->bound_fd, "NOTICE Auth :*** Could not resolve your hostname, using your IP address (%s) instead.", this->bound_user->GetIPString());
 208                 this->bound_user->dns_done = true;
 209         }
 210 }
 211
 212
 213 bool userrec::IsNoticeMaskSet(unsigned char sm)
 214 {
 215         return (snomasks[sm-65]);
 216 }
 217
 218 void userrec::SetNoticeMask(unsigned char sm, bool value)
 219 {
 220         snomasks[sm-65] = value;
 221 }
 222
 223 const char* userrec::FormatNoticeMasks()
 224 {
 225         static char data[MAXBUF];
 226         int offset = 0;
 227
 228         for (int n = 0; n < 64; n++)
 229         {
 230                 if (snomasks[n])
 231                         data[offset++] = n+65;
 232         }
 233
 234         data[offset] = 0;
 235         return data;
 236 }
 237
 238
 239
 240 bool userrec::IsModeSet(unsigned char m)
 241 {
 242         return (modes[m-65]);
 243 }
 244
 245 void userrec::SetMode(unsigned char m, bool value)
 246 {
 247         modes[m-65] = value;
 248 }
 249
 250 const char* userrec::FormatModes()
 251 {
 252         static char data[MAXBUF];
 253         int offset = 0;
 254         for (int n = 0; n < 64; n++)
 255         {
 256                 if (modes[n])
 257                         data[offset++] = n+65;
 258         }
 259         data[offset] = 0;
 260         return data;
 261 }
 262
 263 userrec::userrec()
 264 {
 265         // the PROPER way to do it, AVOID bzero at *ALL* costs
 266         *password = *nick = *ident = *host = *dhost = *fullname = *awaymsg = *oper = 0;
 267         server = (char*)FindServerNamePtr(Config->ServerName);
 268         reset_due = TIME;
 269         lines_in = fd = lastping = signon = idle_lastmsg = nping = registered = 0;
 270         timeout = flood = bytes_in = bytes_out = cmds_in = cmds_out = 0;
 271         haspassed = dns_done = false;
 272         recvq = "";
 273         sendq = "";
 274         WriteError = "";
 275         res_forward = res_reverse = NULL;
 276         ip = NULL;
 277         chans.clear();
 278         invites.clear();
 279         chans.resize(MAXCHANS);
 280         memset(modes,0,sizeof(modes));
 281
 282         for (unsigned int n = 0; n < MAXCHANS; n++)
 283         {
 284                 ucrec* x = new ucrec();
 285                 chans[n] = x;
 286                 x->channel = NULL;
 287                 x->uc_modes = 0;
 288         }
 289 }
 290
 291 userrec::~userrec()
 292 {
 293         for (std::vector<ucrec*>::iterator n = chans.begin(); n != chans.end(); n++)
 294         {
 295                 ucrec* x = (ucrec*)*n;
 296                 delete x;
 297         }
 298
 299         if (ip)
 300         {
 301                 if (this->GetProtocolFamily() == AF_INET)
 302                 {
 303                         delete (sockaddr_in*)ip;
 304                 }
 305 #ifdef SUPPORT_IP6LINKS
 306                 else
 307                 {
 308                         delete (sockaddr_in6*)ip;
 309                 }
 310 #endif
 311         }
 312 }
 313
 314 /* XXX - minor point, other *Host functions return a char *, this one creates it. Might be nice to be consistant? */
 315 void userrec::MakeHost(char* nhost)
 316 {
 317         /* This is much faster than snprintf */
 318         char* t = nhost;
 319         for(char* n = ident; *n; n++)
 320                 *t++ = *n;
 321         *t++ = '@';
 322         for(char* n = host; *n; n++)
 323                 *t++ = *n;
 324         *t = 0;
 325 }
 326
 327 void userrec::CloseSocket()
 328 {
 329         shutdown(this->fd,2);
 330         close(this->fd);
 331 }
 332
 333 char* userrec::GetFullHost()
 334 {
 335         static char result[MAXBUF];
 336         char* t = result;
 337         for(char* n = nick; *n; n++)
 338                 *t++ = *n;
 339         *t++ = '!';
 340         for(char* n = ident; *n; n++)
 341                 *t++ = *n;
 342         *t++ = '@';
 343         for(char* n = dhost; *n; n++)
 344                 *t++ = *n;
 345         *t = 0;
 346         return result;
 347 }
 348
 349 char* userrec::MakeWildHost()
 350 {
 351         static char nresult[MAXBUF];
 352         char* t = nresult;
 353         *t++ = '*';     *t++ = '!';
 354         *t++ = '*';     *t++ = '@';
 355         for(char* n = dhost; *n; n++)
 356                 *t++ = *n;
 357         *t = 0;
 358         return nresult;
 359 }
 360
 361 int userrec::ReadData(void* buffer, size_t size)
 362 {
 363         if (this->fd > -1)
 364         {
 365                 return read(this->fd, buffer, size);
 366         }
 367         else
 368                 return 0;
 369 }
 370
 371
 372 char* userrec::GetFullRealHost()
 373 {
 374         static char fresult[MAXBUF];
 375         char* t = fresult;
 376         for(char* n = nick; *n; n++)
 377                 *t++ = *n;
 378         *t++ = '!';
 379         for(char* n = ident; *n; n++)
 380                 *t++ = *n;
 381         *t++ = '@';
 382         for(char* n = host; *n; n++)
 383                 *t++ = *n;
 384         *t = 0;
 385         return fresult;
 386 }
 387
 388 bool userrec::IsInvited(irc::string &channel)
 389 {
 390         for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 391         {
 392                 irc::string compare = i->channel;
 393
 394                 if (compare == channel)
 395                 {
 396                         return true;
 397                 }
 398         }
 399         return false;
 400 }
 401
 402 InvitedList* userrec::GetInviteList()
 403 {
 404         return &invites;
 405 }
 406
 407 void userrec::InviteTo(irc::string &channel)
 408 {
 409         Invited i;
 410         i.channel = channel;
 411         invites.push_back(i);
 412 }
 413
 414 void userrec::RemoveInvite(irc::string &channel)
 415 {
 416         log(DEBUG,"Removing invites");
 417
 418         if (invites.size())
 419         {
 420                 for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 421                 {
 422                         irc::string compare = i->channel;
 423
 424                         if (compare == channel)
 425                         {
 426                                 invites.erase(i);
 427                                 return;
 428                         }
 429                 }
 430         }
 431 }
 432
 433 bool userrec::HasPermission(const std::string &command)
 434 {
 435         char* mycmd;
 436         char* savept;
 437         char* savept2;
 438
 439         /*
 440          * users on remote servers can completely bypass all permissions based checks.
 441          * This prevents desyncs when one server has different type/class tags to another.
 442          * That having been said, this does open things up to the possibility of source changes
 443          * allowing remote kills, etc - but if they have access to the src, they most likely have
 444          * access to the conf - so it's an end to a means either way.
 445          */
 446         if (!IS_LOCAL(this))
 447                 return true;
 448
 449         // are they even an oper at all?
 450         if (*this->oper)
 451         {
 452                 opertype_t::iterator iter_opertype = opertypes.find(this->oper);
 453                 if (iter_opertype != opertypes.end())
 454                 {
 455                         char* Classes = strdup(iter_opertype->second);
 456                         char* myclass = strtok_r(Classes," ",&savept);
 457                         while (myclass)
 458                         {
 459                                 operclass_t::iterator iter_operclass = operclass.find(myclass);
 460                                 if (iter_operclass != operclass.end())
 461                                 {
 462                                         char* CommandList = strdup(iter_operclass->second);
 463                                         mycmd = strtok_r(CommandList," ",&savept2);
 464                                         while (mycmd)
 465                                         {
 466                                                 if ((!strcasecmp(mycmd,command.c_str())) || (*mycmd == '*'))
 467                                                 {
 468                                                         free(Classes);
 469                                                         free(CommandList);
 470                                                         return true;
 471                                                 }
 472                                                 mycmd = strtok_r(NULL," ",&savept2);
 473                                         }
 474                                         free(CommandList);
 475                                 }
 476                                 myclass = strtok_r(NULL," ",&savept);
 477                         }
 478                         free(Classes);
 479                 }
 480         }
 481         return false;
 482 }
 483
 484
 485 bool userrec::AddBuffer(const std::string &a)
 486 {
 487         std::string b = "";
 488
 489         /* NB: std::string is arsey about \r and \n and tries to translate them
 490          * somehow, so we CANNOT use std::string::find() here :(
 491          */
 492         for (std::string::const_iterator i = a.begin(); i != a.end(); i++)
 493         {
 494                 if (*i != '\r')
 495                         b += *i;
 496         }
 497
 498         if (b.length())
 499                 recvq.append(b);
 500
 501         if (recvq.length() > (unsigned)this->recvqmax)
 502         {
 503                 this->SetWriteError("RecvQ exceeded");
 504                 WriteOpers("*** User %s RecvQ of %d exceeds connect class maximum of %d",this->nick,recvq.length(),this->recvqmax);
 505                 return false;
 506         }
 507
 508         return true;
 509 }
 510
 511 bool userrec::BufferIsReady()
 512 {
 513         return (recvq.find('\n') != std::string::npos);
 514 }
 515
 516 void userrec::ClearBuffer()
 517 {
 518         recvq = "";
 519 }
 520
 521 std::string userrec::GetBuffer()
 522 {
 523         if (!recvq.length())
 524                 return "";
 525
 526         /* Strip any leading \r or \n off the string.
 527          * Usually there are only one or two of these,
 528          * so its is computationally cheap to do.
 529          */
 530         while ((*recvq.begin() == '\r') || (*recvq.begin() == '\n'))
 531                 recvq.erase(recvq.begin());
 532
 533         for (std::string::iterator x = recvq.begin(); x != recvq.end(); x++)
 534         {
 535                 /* Find the first complete line, return it as the
 536                  * result, and leave the recvq as whats left
 537                  */
 538                 if (*x == '\n')
 539                 {
 540                         std::string ret = std::string(recvq.begin(), x);
 541                         recvq.erase(recvq.begin(), x + 1);
 542                         return ret;
 543                 }
 544         }
 545         return "";
 546 }
 547
 548 void userrec::AddWriteBuf(const std::string &data)
 549 {
 550         if (*this->GetWriteError())
 551                 return;
 552
 553         if (sendq.length() + data.length() > (unsigned)this->sendqmax)
 554         {
 555                 /*
 556                  * Fix by brain - Set the error text BEFORE calling writeopers, because
 557                  * if we dont it'll recursively  call here over and over again trying
 558                  * to repeatedly add the text to the sendq!
 559                  */
 560                 this->SetWriteError("SendQ exceeded");
 561                 WriteOpers("*** User %s SendQ of %d exceeds connect class maximum of %d",this->nick,sendq.length() + data.length(),this->sendqmax);
 562                 return;
 563         }
 564
 565         if (data.length() > 512)
 566         {
 567                 std::string newdata(data);
 568                 newdata.resize(510);
 569                 newdata.append("\r\n");
 570                 sendq.append(newdata);
 571         }
 572         else
 573         {
 574                 sendq.append(data);
 575         }
 576 }
 577
 578 // send AS MUCH OF THE USERS SENDQ as we are able to (might not be all of it)
 579 void userrec::FlushWriteBuf()
 580 {
 581         if ((sendq.length()) && (this->fd != FD_MAGIC_NUMBER))
 582         {
 583                 const char* tb = this->sendq.c_str();
 584                 int n_sent = write(this->fd,tb,this->sendq.length());
 585                 if (n_sent == -1)
 586                 {
 587                         if (errno != EAGAIN)
 588                                 this->SetWriteError(strerror(errno));
 589                 }
 590                 else
 591                 {
 592                         // advance the queue
 593                         tb += n_sent;
 594                         this->sendq = tb;
 595                         // update the user's stats counters
 596                         this->bytes_out += n_sent;
 597                         this->cmds_out++;
 598                 }
 599         }
 600 }
 601
 602 void userrec::SetWriteError(const std::string &error)
 603 {
 604         log(DEBUG,"SetWriteError: %s",error.c_str());
 605         // don't try to set the error twice, its already set take the first string.
 606         if (!this->WriteError.length())
 607         {
 608                 log(DEBUG,"Setting error string for %s to '%s'",this->nick,error.c_str());
 609                 this->WriteError = error;
 610         }
 611 }
 612
 613 const char* userrec::GetWriteError()
 614 {
 615         return this->WriteError.c_str();
 616 }
 617
 618 void userrec::Oper(const std::string &opertype)
 619 {
 620         this->modes[UM_OPERATOR] = 1;
 621         WriteServ(this->fd, "MODE %s :+o", this->nick);
 622         FOREACH_MOD(I_OnOper, OnOper(this, opertype));
 623         log(DEFAULT,"OPER: %s!%s@%s opered as type: %s", this->nick, this->ident, this->host, opertype.c_str());
 624         strlcpy(this->oper, opertype.c_str(), NICKMAX - 1);
 625         all_opers.push_back(this);
 626         FOREACH_MOD(I_OnPostOper,OnPostOper(this, opertype));
 627 }
 628
 629 void userrec::UnOper()
 630 {
 631         if (*this->oper)
 632         {
 633                 *this->oper = 0;
 634                 this->modes[UM_OPERATOR] = 0;
 635                 for (std::vector<userrec*>::iterator a = all_opers.begin(); a < all_opers.end(); a++)
 636                 {
 637                         if (*a == this)
 638                         {
 639                                 log(DEBUG,"Oper removed from optimization list");
 640                                 all_opers.erase(a);
 641                                 return;
 642                         }
 643                 }
 644         }
 645 }
 646
 647 void userrec::QuitUser(userrec *user,const std::string &quitreason)
 648 {
 649         user_hash::iterator iter = clientlist.find(user->nick);
 650
 651 /*
 652  * I'm pretty sure returning here is causing a desync when part of the net thinks a user is gone,
 653  * and another part doesn't. We want to broadcast the quit/kill before bailing so the net stays in sync.
 654  *
 655  * I can't imagine this blowing up, so I'm commenting it out. We still check
 656  * before playing with a bad iterator below in our if(). DISCUSS THIS BEFORE YOU DO ANYTHING. --w00t
 657  *
 658  *      if (iter == clientlist.end())
 659  *              return;
 660  */
 661         std::string reason = quitreason;
 662
 663         if (reason.length() > MAXQUIT - 1)
 664                 reason.resize(MAXQUIT - 1);
 665
 666         if (IS_LOCAL(user))
 667                 Write(user->fd,"ERROR :Closing link (%s@%s) [%s]",user->ident,user->host,reason.c_str());
 668
 669         if (user->registered == REG_ALL)
 670         {
 671                 purge_empty_chans(user);
 672                 FOREACH_MOD(I_OnUserQuit,OnUserQuit(user,reason));
 673                 WriteCommonExcept(user,"QUIT :%s",reason.c_str());
 674         }
 675
 676         if (IS_LOCAL(user))
 677                 user->FlushWriteBuf();
 678
 679         FOREACH_MOD(I_OnUserDisconnect,OnUserDisconnect(user));
 680
 681         if (IS_LOCAL(user))
 682         {
 683                 if (Config->GetIOHook(user->GetPort()))
 684                 {
 685                         try
 686                         {
 687                                 Config->GetIOHook(user->GetPort())->OnRawSocketClose(user->fd);
 688                         }
 689                         catch (ModuleException& modexcept)
 690                         {
 691                                 log(DEBUG,"Module exception cought: %s",modexcept.GetReason());
 692                         }
 693                 }
 694
 695                 ServerInstance->SE->DelFd(user->fd);
 696                 user->CloseSocket();
 697         }
 698
 699         /*
 700          * this must come before the WriteOpers so that it doesnt try to fill their buffer with anything
 701          * if they were an oper with +s.
 702          *
 703          * XXX -
 704          * In the current implementation, we only show local quits, as we only show local connects. With
 705          * the proposed implmentation of snomasks however, this will likely change in the (near?) future.
 706          */
 707         if (user->registered == REG_ALL)
 708         {
 709                 if (IS_LOCAL(user))
 710                         WriteOpers("*** Client exiting: %s!%s@%s [%s]",user->nick,user->ident,user->host,reason.c_str());
 711                 user->AddToWhoWas();
 712         }
 713
 714         if (iter != clientlist.end())
 715         {
 716                 log(DEBUG,"deleting user hash value %lx",(unsigned long)user);
 717                 if (IS_LOCAL(user))
 718                 {
 719                         fd_ref_table[user->fd] = NULL;
 720                         if (find(local_users.begin(),local_users.end(),user) != local_users.end())
 721                                 local_users.erase(find(local_users.begin(),local_users.end(),user));
 722                 }
 723                 clientlist.erase(iter);
 724                 DELETE(user);
 725         }
 726 }
 727
 728 WhoWasGroup::WhoWasGroup(userrec* user) : host(NULL), dhost(NULL), ident(NULL), server(NULL), gecos(NULL), signon(user->signon)
 729 {
 730         this->host = strdup(user->host);
 731         this->dhost = strdup(user->dhost);
 732         this->ident = strdup(user->ident);
 733         this->server = user->server;
 734         this->gecos = strdup(user->fullname);
 735 }
 736
 737 WhoWasGroup::~WhoWasGroup()
 738 {
 739         if (host)
 740                 free(host);
 741         if (dhost)
 742                 free(dhost);
 743         if (ident)
 744                 free(ident);
 745         if (gecos)
 746                 free(gecos);
 747 }
 748
 749 /* adds or updates an entry in the whowas list */
 750 void userrec::AddToWhoWas()
 751 {
 752         whowas_users::iterator iter = whowas.find(this->nick);
 753
 754         if (iter == whowas.end())
 755         {
 756                 whowas_set* n = new whowas_set;
 757                 WhoWasGroup *a = new WhoWasGroup(this);
 758                 n->push_back(a);
 759                 whowas[this->nick] = n;
 760         }
 761         else
 762         {
 763                 whowas_set* group = (whowas_set*)iter->second;
 764
 765                 if (group->size() > 10)
 766                 {
 767                         WhoWasGroup *a = (WhoWasGroup*)*(group->begin());
 768                         DELETE(a);
 769                         group->pop_front();
 770                 }
 771
 772                 WhoWasGroup *a = new WhoWasGroup(this);
 773                 group->push_back(a);
 774         }
 775 }
 776
 777 /* every hour, run this function which removes all entries over 3 days */
 778 void MaintainWhoWas(time_t TIME)
 779 {
 780         for (whowas_users::iterator iter = whowas.begin(); iter != whowas.end(); iter++)
 781         {
 782                 whowas_set* n = (whowas_set*)iter->second;
 783                 if (n->size())
 784                 {
 785                         while ((n->begin() != n->end()) && ((*n->begin())->signon < TIME - 259200)) // 3 days
 786                         {
 787                                 WhoWasGroup *a = *(n->begin());
 788                                 DELETE(a);
 789                                 n->erase(n->begin());
 790                         }
 791                 }
 792         }
 793 }
 794
 795 /* add a client connection to the sockets list */
 796 void AddClient(int socket, int port, bool iscached, insp_inaddr ip)
 797 {
 798         std::string tempnick = ConvToStr(socket) + "-unknown";
 799         user_hash::iterator iter = clientlist.find(tempnick);
 800         const char *ipaddr = insp_ntoa(ip);
 801         userrec* _new;
 802         int j = 0;
 803
 804         /*
 805          * fix by brain.
 806          * as these nicknames are 'RFC impossible', we can be sure nobody is going to be
 807          * using one as a registered connection. As they are per fd, we can also safely assume
 808          * that we wont have collisions. Therefore, if the nick exists in the list, its only
 809          * used by a dead socket, erase the iterator so that the new client may reclaim it.
 810          * this was probably the cause of 'server ignores me when i hammer it with reconnects'
 811          * issue in earlier alphas/betas
 812          */
 813         if (iter != clientlist.end())
 814         {
 815                 userrec* goner = iter->second;
 816                 DELETE(goner);
 817                 clientlist.erase(iter);
 818         }
 819
 820         log(DEBUG,"AddClient: %d %d %s",socket,port,ipaddr);
 821
 822         _new = new userrec();
 823         clientlist[tempnick] = _new;
 824         _new->fd = socket;
 825         strlcpy(_new->nick,tempnick.c_str(),NICKMAX-1);
 826
 827         _new->server = FindServerNamePtr(Config->ServerName);
 828         /* We don't need range checking here, we KNOW 'unknown\0' will fit into the ident field. */
 829         strcpy(_new->ident, "unknown");
 830
 831         _new->registered = REG_NONE;
 832         _new->signon = TIME + Config->dns_timeout;
 833         _new->lastping = 1;
 834
 835         log(DEBUG,"Setting socket addresses");
 836         _new->SetSockAddr(AF_FAMILY, ipaddr, port);
 837         log(DEBUG,"Socket addresses set.");
 838
 839         /* Smarter than your average bear^H^H^H^Hset of strlcpys. */
 840         for (const char* temp = _new->GetIPString(); *temp && j < 64; temp++, j++)
 841                 _new->dhost[j] = _new->host[j] = *temp;
 842         _new->dhost[j] = _new->host[j] = 0;
 843
 844         // set the registration timeout for this user
 845         unsigned long class_regtimeout = 90;
 846         int class_flood = 0;
 847         long class_threshold = 5;
 848         long class_sqmax = 262144;      // 256kb
 849         long class_rqmax = 4096;        // 4k
 850
 851         for (ClassVector::iterator i = Config->Classes.begin(); i != Config->Classes.end(); i++)
 852         {
 853                 if ((i->type == CC_ALLOW) && (match(ipaddr,i->host.c_str(),true)))
 854                 {
 855                         class_regtimeout = (unsigned long)i->registration_timeout;
 856                         class_flood = i->flood;
 857                         _new->pingmax = i->pingtime;
 858                         class_threshold = i->threshold;
 859                         class_sqmax = i->sendqmax;
 860                         class_rqmax = i->recvqmax;
 861                         break;
 862                 }
 863         }
 864
 865         _new->nping = TIME + _new->pingmax + Config->dns_timeout;
 866         _new->timeout = TIME+class_regtimeout;
 867         _new->flood = class_flood;
 868         _new->threshold = class_threshold;
 869         _new->sendqmax = class_sqmax;
 870         _new->recvqmax = class_rqmax;
 871
 872         fd_ref_table[socket] = _new;
 873         local_users.push_back(_new);
 874
 875         if (local_users.size() > Config->SoftLimit)
 876         {
 877                 userrec::QuitUser(_new,"No more connections allowed");
 878                 return;
 879         }
 880
 881         if (local_users.size() >= MAXCLIENTS)
 882         {
 883                 userrec::QuitUser(_new,"No more connections allowed");
 884                 return;
 885         }
 886
 887         /*
 888          * XXX -
 889          * this is done as a safety check to keep the file descriptors within range of fd_ref_table.
 890          * its a pretty big but for the moment valid assumption:
 891          * file descriptors are handed out starting at 0, and are recycled as theyre freed.
 892          * therefore if there is ever an fd over 65535, 65536 clients must be connected to the
 893          * irc server at once (or the irc server otherwise initiating this many connections, files etc)
 894          * which for the time being is a physical impossibility (even the largest networks dont have more
 895          * than about 10,000 users on ONE server!)
 896          */
 897         if ((unsigned)socket >= MAX_DESCRIPTORS)
 898         {
 899                 userrec::QuitUser(_new,"Server is full");
 900                 return;
 901         }
 902         char* e = matches_exception(ipaddr);
 903         if (!e)
 904         {
 905                 char* r = matches_zline(ipaddr);
 906                 if (r)
 907                 {
 908                         char reason[MAXBUF];
 909                         snprintf(reason,MAXBUF,"Z-Lined: %s",r);
 910                         userrec::QuitUser(_new,reason);
 911                         return;
 912                 }
 913         }
 914
 915         if (socket > -1)
 916         {
 917                 if (!ServerInstance->SE->AddFd(socket,true,X_ESTAB_CLIENT))
 918                 {
 919                         userrec::QuitUser(_new, "Internal error handling connection");
 920                         return;
 921                 }
 922         }
 923
 924         WriteServ(_new->fd,"NOTICE Auth :*** Looking up your hostname...");
 925 }
 926
 927 long FindMatchingGlobal(userrec* user)
 928 {
 929         char u1[1024];
 930         char u2[1024];
 931         long x = 0;
 932         for (user_hash::const_iterator a = clientlist.begin(); a != clientlist.end(); a++)
 933         {
 934                 /* We have to match ip's as strings - we don't know what protocol
 935                  * a remote user may be using
 936                  */
 937                 if (!strcasecmp(a->second->GetIPString(u1), user->GetIPString(u2)))
 938                                 x++;
 939         }
 940         return x;
 941 }
 942
 943 long FindMatchingLocal(userrec* user)
 944 {
 945         long x = 0;
 946         for (std::vector<userrec*>::const_iterator a = local_users.begin(); a != local_users.end(); a++)
 947         {
 948                 userrec* comp = *a;
 949 #ifdef IPV6
 950                 /* I dont think theres any faster way of matching two ipv6 addresses than memcmp */
 951                 in6_addr* s1 = &(((sockaddr_in6*)comp->ip)->sin6_addr);
 952                 in6_addr* s2 = &(((sockaddr_in6*)user->ip)->sin6_addr);
 953                 if (!memcmp(s1->s6_addr, s2->s6_addr, sizeof(in6_addr)))
 954                         x++;
 955 #else
 956                 in_addr* s1 = &((sockaddr_in*)comp->ip)->sin_addr;
 957                 in_addr* s2 = &((sockaddr_in*)user->ip)->sin_addr;
 958                 if (s1->s_addr == s2->s_addr)
 959                         x++;
 960 #endif
 961         }
 962         return x;
 963 }
 964
 965 void FullConnectUser(userrec* user, CullList* Goners)
 966 {
 967         ServerInstance->stats->statsConnects++;
 968         user->idle_lastmsg = TIME;
 969         log(DEBUG,"ConnectUser: %s",user->nick);
 970
 971         ConnectClass a = GetClass(user);
 972
 973         if (a.type == CC_DENY)
 974         {
 975                 Goners->AddItem(user,"Unauthorised connection");
 976                 return;
 977         }
 978
 979         if ((*(a.pass.c_str())) && (!user->haspassed))
 980         {
 981                 Goners->AddItem(user,"Invalid password");
 982                 return;
 983         }
 984
 985         if (FindMatchingLocal(user) > a.maxlocal)
 986         {
 987                 Goners->AddItem(user,"No more connections allowed from your host via this connect class (local)");
 988                 WriteOpers("*** WARNING: maximum LOCAL connections (%ld) exceeded for IP %s",a.maxlocal,user->GetIPString());
 989                 return;
 990         }
 991         else if (FindMatchingGlobal(user) > a.maxglobal)
 992         {
 993                 Goners->AddItem(user,"No more connections allowed from your host via this connect class (global)");
 994                 WriteOpers("*** WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s",a.maxglobal,user->GetIPString());
 995                 return;
 996         }
 997
 998         char match_against[MAXBUF];
 999         snprintf(match_against,MAXBUF,"%s@%s",user->ident,user->host);
1000         char* e = matches_exception(match_against);
1001
1002         if (!e)
1003         {
1004                 char* r = matches_gline(match_against);
1005
1006                 if (r)
1007                 {
1008                         char reason[MAXBUF];
1009                         snprintf(reason,MAXBUF,"G-Lined: %s",r);
1010                         Goners->AddItem(user,reason);
1011                         return;
1012                 }
1013
1014                 r = matches_kline(match_against);
1015
1016                 if (r)
1017                 {
1018                         char reason[MAXBUF];
1019                         snprintf(reason,MAXBUF,"K-Lined: %s",r);
1020                         Goners->AddItem(user,reason);
1021                         return;
1022                 }
1023         }
1024
1025
1026         WriteServ(user->fd,"NOTICE Auth :Welcome to \002%s\002!",Config->Network);
1027         WriteServ(user->fd,"001 %s :Welcome to the %s IRC Network %s!%s@%s",user->nick,Config->Network,user->nick,user->ident,user->host);
1028         WriteServ(user->fd,"002 %s :Your host is %s, running version %s",user->nick,Config->ServerName,VERSION);
1029         WriteServ(user->fd,"003 %s :This server was created %s %s",user->nick,__TIME__,__DATE__);
1030         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());
1031
1032         // anfl @ #ratbox, efnet reminded me that according to the RFC this cant contain more than 13 tokens per line...
1033         // so i'd better split it :)
1034         std::stringstream out(Config->data005);
1035         std::string token = "";
1036         std::string line5 = "";
1037         int token_counter = 0;
1038
1039         while (!out.eof())
1040         {
1041                 out >> token;
1042                 line5 = line5 + token + " ";
1043                 token_counter++;
1044
1045                 if ((token_counter >= 13) || (out.eof() == true))
1046                 {
1047                         WriteServ(user->fd,"005 %s %s:are supported by this server",user->nick,line5.c_str());
1048                         line5 = "";
1049                         token_counter = 0;
1050                 }
1051         }
1052
1053         ShowMOTD(user);
1054
1055         /*
1056          * fix 3 by brain, move registered = 7 below these so that spurious modes and host
1057          * changes dont go out onto the network and produce 'fake direction'.
1058          */
1059         FOREACH_MOD(I_OnUserConnect,OnUserConnect(user));
1060         FOREACH_MOD(I_OnGlobalConnect,OnGlobalConnect(user));
1061         user->registered = REG_ALL;
1062         WriteOpers("*** Client connecting on port %d: %s!%s@%s [%s]",user->GetPort(),user->nick,user->ident,user->host,user->GetIPString());
1063 }
1064
1065 /** ReHashNick()
1066  * re-allocates a nick in the user_hash after they change nicknames,
1067  * returns a pointer to the new user as it may have moved
1068  */
1069 userrec* ReHashNick(const char* Old, const char* New)
1070 {
1071         //user_hash::iterator newnick;
1072         user_hash::iterator oldnick = clientlist.find(Old);
1073
1074         log(DEBUG,"ReHashNick: %s %s",Old,New);
1075
1076         if (!strcasecmp(Old,New))
1077         {
1078                 log(DEBUG,"old nick is new nick, skipping");
1079                 return oldnick->second;
1080         }
1081
1082         if (oldnick == clientlist.end())
1083                 return NULL; /* doesnt exist */
1084
1085         log(DEBUG,"ReHashNick: Found hashed nick %s",Old);
1086
1087         userrec* olduser = oldnick->second;
1088         clientlist[New] = olduser;
1089         clientlist.erase(oldnick);
1090
1091         log(DEBUG,"ReHashNick: Nick rehashed as %s",New);
1092
1093         return clientlist[New];
1094 }
1095
1096 void force_nickchange(userrec* user,const char* newnick)
1097 {
1098         char nick[MAXBUF];
1099         int MOD_RESULT = 0;
1100
1101         *nick = 0;
1102
1103         FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(user,newnick));
1104
1105         if (MOD_RESULT)
1106         {
1107                 ServerInstance->stats->statsCollisions++;
1108                 userrec::QuitUser(user,"Nickname collision");
1109                 return;
1110         }
1111
1112         if (matches_qline(newnick))
1113         {
1114                 ServerInstance->stats->statsCollisions++;
1115                 userrec::QuitUser(user,"Nickname collision");
1116                 return;
1117         }
1118
1119         if (user)
1120         {
1121                 if (newnick)
1122                 {
1123                         strlcpy(nick,newnick,MAXBUF-1);
1124                 }
1125
1126                 if (user->registered == REG_ALL)
1127                 {
1128                         const char* pars[1];
1129                         pars[0] = nick;
1130                         std::string cmd = "NICK";
1131
1132                         ServerInstance->Parser->CallHandler(cmd,pars,1,user);
1133                 }
1134         }
1135 }
1136
1137 void userrec::SetSockAddr(int protocol_family, const char* ip, int port)
1138 {
1139         switch (protocol_family)
1140         {
1141 #ifdef SUPPORT_IP6LINKS
1142                 case AF_INET6:
1143                 {
1144                         log(DEBUG,"Set inet6 protocol address");
1145                         sockaddr_in6* sin = new sockaddr_in6;
1146                         sin->sin6_family = AF_INET6;
1147                         sin->sin6_port = port;
1148                         inet_pton(AF_INET6, ip, &sin->sin6_addr);
1149                         this->ip = (sockaddr*)sin;
1150                 }
1151                 break;
1152 #endif
1153                 case AF_INET:
1154                 {
1155                         log(DEBUG,"Set inet4 protocol address");
1156                         sockaddr_in* sin = new sockaddr_in;
1157                         sin->sin_family = AF_INET;
1158                         sin->sin_port = port;
1159                         inet_pton(AF_INET, ip, &sin->sin_addr);
1160                         this->ip = (sockaddr*)sin;
1161                 }
1162                 break;
1163                 default:
1164                         log(DEBUG,"Ut oh, I dont know protocol %d to be set on '%s'!", protocol_family, this->nick);
1165                 break;
1166         }
1167 }
1168
1169 int userrec::GetPort()
1170 {
1171         if (this->ip == NULL)
1172                 return 0;
1173
1174         switch (this->GetProtocolFamily())
1175         {
1176 #ifdef SUPPORT_IP6LINKS
1177                 case AF_INET6:
1178                 {
1179                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1180                         return sin->sin6_port;
1181                 }
1182                 break;
1183 #endif
1184                 case AF_INET:
1185                 {
1186                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1187                         return sin->sin_port;
1188                 }
1189                 break;
1190                 default:
1191                         log(DEBUG,"Ut oh, '%s' has an unknown protocol family!",this->nick);
1192                 break;
1193         }
1194         return 0;
1195 }
1196
1197 int userrec::GetProtocolFamily()
1198 {
1199         if (this->ip == NULL)
1200                 return 0;
1201
1202         sockaddr_in* sin = (sockaddr_in*)this->ip;
1203         return sin->sin_family;
1204 }
1205
1206 const char* userrec::GetIPString()
1207 {
1208         static char buf[1024];
1209         static char temp[1024];
1210
1211         if (this->ip == NULL)
1212                 return "";
1213
1214         switch (this->GetProtocolFamily())
1215         {
1216 #ifdef SUPPORT_IP6LINKS
1217                 case AF_INET6:
1218                 {
1219                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1220                         inet_ntop(sin->sin6_family, &sin->sin6_addr, buf, sizeof(buf));
1221                         /* IP addresses starting with a : on irc are a Bad Thing (tm) */
1222                         if (*buf == ':')
1223                         {
1224                                 strlcpy(&temp[1], buf, sizeof(temp));
1225                                 *temp = '0';
1226                                 return temp;
1227                         }
1228                         return buf;
1229                 }
1230                 break;
1231 #endif
1232                 case AF_INET:
1233                 {
1234                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1235                         inet_ntop(sin->sin_family, &sin->sin_addr, buf, sizeof(buf));
1236                         return buf;
1237                 }
1238                 break;
1239                 default:
1240                         log(DEBUG,"Ut oh, '%s' has an unknown protocol family!",this->nick);
1241                 break;
1242         }
1243         return "";
1244 }
1245
1246 const char* userrec::GetIPString(char* buf)
1247 {
1248         static char temp[1024];
1249
1250         if (this->ip == NULL)
1251         {
1252                 *buf = 0;
1253                 return buf;
1254         }
1255
1256         switch (this->GetProtocolFamily())
1257         {
1258 #ifdef SUPPORT_IP6LINKS
1259                 case AF_INET6:
1260                 {
1261                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1262                         inet_ntop(sin->sin6_family, &sin->sin6_addr, buf, sizeof(buf));
1263                         /* IP addresses starting with a : on irc are a Bad Thing (tm) */
1264                         if (*buf == ':')
1265                         {
1266                                 strlcpy(&temp[1], buf, sizeof(temp));
1267                                 *temp = '0';
1268                                 strlcpy(buf, temp, sizeof(temp));
1269                         }
1270                         return buf;
1271                 }
1272                 break;
1273 #endif
1274                 case AF_INET:
1275                 {
1276                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1277                         inet_ntop(sin->sin_family, &sin->sin_addr, buf, sizeof(buf));
1278                         return buf;
1279                 }
1280                 break;
1281
1282                 default:
1283                         log(DEBUG,"Ut oh, '%s' has an unknown protocol family!",this->nick);
1284                 break;
1285         }
1286         return "";
1287 }
1288