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 <stdarg.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 std::vector<Module*> modules;
  37 extern std::vector<ircd_module*> factory;
  38 extern std::vector<InspSocket*> module_sockets;
  39 extern int MODCOUNT;
  40 extern time_t TIME;
  41 extern user_hash clientlist;
  42 extern Server* MyServer;
  43 extern std::vector<userrec*> local_users;
  44
  45 irc::whowas::whowas_users whowas;
  46 static unsigned long already_sent[MAX_DESCRIPTORS] = {0};
  47 std::vector<userrec*> all_opers;
  48
  49 typedef std::map<irc::string,char*> opertype_t;
  50 typedef opertype_t operclass_t;
  51
  52 opertype_t opertypes;
  53 operclass_t operclass;
  54
  55 /* XXX: Used for speeding up WriteCommon operations */
  56 unsigned long uniq_id = 0;
  57
  58 bool InitTypes(ServerConfig* conf, const char* tag)
  59 {
  60         for (opertype_t::iterator n = opertypes.begin(); n != opertypes.end(); n++)
  61         {
  62                 if (n->second)
  63                         delete[] n->second;
  64         }
  65
  66         opertypes.clear();
  67         return true;
  68 }
  69
  70 bool InitClasses(ServerConfig* conf, const char* tag)
  71 {
  72         for (operclass_t::iterator n = operclass.begin(); n != operclass.end(); n++)
  73         {
  74                 if (n->second)
  75                         delete[] n->second;
  76         }
  77
  78         operclass.clear();
  79         return true;
  80 }
  81
  82 bool DoType(ServerConfig* conf, const char* tag, char** entries, void** values, int* types)
  83 {
  84         char* TypeName = (char*)values[0];
  85         char* Classes = (char*)values[1];
  86
  87         opertypes[TypeName] = strdup(Classes);
  88         log(DEBUG,"Read oper TYPE '%s' with classes '%s'",TypeName,Classes);
  89         return true;
  90 }
  91
  92 bool DoClass(ServerConfig* conf, const char* tag, char** entries, void** values, int* types)
  93 {
  94         char* ClassName = (char*)values[0];
  95         char* CommandList = (char*)values[1];
  96
  97         operclass[ClassName] = strdup(CommandList);
  98         log(DEBUG,"Read oper CLASS '%s' with commands '%s'",ClassName,CommandList);
  99         return true;
 100 }
 101
 102 bool DoneClassesAndTypes(ServerConfig* conf, const char* tag)
 103 {
 104         return true;
 105 }
 106
 107 bool userrec::ProcessNoticeMasks(const char *sm)
 108 {
 109         bool adding = true;
 110         const char *c = sm;
 111
 112         while (c && *c)
 113         {
 114                 switch (*c)
 115                 {
 116                         case '+':
 117                                 adding = true;
 118                                 break;
 119                         case '-':
 120                                 adding = false;
 121                                 break;
 122                         default:
 123                                 if ((*c >= 'A') && (*c <= 'z'))
 124                                         this->SetNoticeMask(*c, adding);
 125                                 break;
 126                 }
 127
 128                 *c++;
 129         }
 130
 131         return true;
 132 }
 133
 134 void userrec::StartDNSLookup()
 135 {
 136         log(DEBUG,"Commencing reverse lookup");
 137         try
 138         {
 139                 res_reverse = new UserResolver(this, this->GetIPString(), false);
 140                 MyServer->AddResolver(res_reverse);
 141         }
 142         catch (ModuleException& e)
 143         {
 144                 log(DEBUG,"Error in resolver: %s",e.GetReason());
 145         }
 146 }
 147
 148 UserResolver::UserResolver(userrec* user, std::string to_resolve, bool forward) : Resolver(to_resolve, forward ? DNS_QUERY_FORWARD : DNS_QUERY_REVERSE), bound_user(user)
 149 {
 150         this->fwd = forward;
 151         this->bound_fd = user->fd;
 152 }
 153
 154 void UserResolver::OnLookupComplete(const std::string &result)
 155 {
 156         if ((!this->fwd) && (ServerInstance->fd_ref_table[this->bound_fd] == this->bound_user))
 157         {
 158                 log(DEBUG,"Commencing forward lookup");
 159                 this->bound_user->stored_host = result;
 160                 try
 161                 {
 162                         bound_user->res_forward = new UserResolver(this->bound_user, result, true);
 163                         MyServer->AddResolver(bound_user->res_forward);
 164                 }
 165                 catch (ModuleException& e)
 166                 {
 167                         log(DEBUG,"Error in resolver: %s",e.GetReason());
 168                 }
 169         }
 170         else if ((this->fwd) && (ServerInstance->fd_ref_table[this->bound_fd] == this->bound_user))
 171         {
 172                 /* Both lookups completed */
 173                 if (this->bound_user->GetIPString() == result)
 174                 {
 175                         std::string hostname = this->bound_user->stored_host;
 176                         if (hostname.length() < 65)
 177                         {
 178                                 /* Hostnames starting with : are not a good thing (tm) */
 179                                 if (*(hostname.c_str()) == ':')
 180                                         hostname = "0" + hostname;
 181
 182                                 this->bound_user->WriteServ("NOTICE Auth :*** Found your hostname (%s)", hostname.c_str());
 183                                 this->bound_user->dns_done = true;
 184                                 strlcpy(this->bound_user->dhost, hostname.c_str(),64);
 185                                 strlcpy(this->bound_user->host, hostname.c_str(),64);
 186                         }
 187                         else
 188                         {
 189                                 this->bound_user->WriteServ("NOTICE Auth :*** Your hostname is longer than the maximum of 64 characters, using your IP address (%s) instead.", this->bound_user->GetIPString());
 190                         }
 191                 }
 192                 else
 193                 {
 194                         this->bound_user->WriteServ("NOTICE Auth :*** Your hostname does not match up with your IP address. Sorry, using your IP address (%s) instead.", this->bound_user->GetIPString());
 195                 }
 196         }
 197 }
 198
 199 void UserResolver::OnError(ResolverError e, const std::string &errormessage)
 200 {
 201         if (ServerInstance->fd_ref_table[this->bound_fd] == this->bound_user)
 202         {
 203                 /* Error message here */
 204                 this->bound_user->WriteServ("NOTICE Auth :*** Could not resolve your hostname, using your IP address (%s) instead.", this->bound_user->GetIPString());
 205                 this->bound_user->dns_done = true;
 206         }
 207 }
 208
 209
 210 bool userrec::IsNoticeMaskSet(unsigned char sm)
 211 {
 212         return (snomasks[sm-65]);
 213 }
 214
 215 void userrec::SetNoticeMask(unsigned char sm, bool value)
 216 {
 217         snomasks[sm-65] = value;
 218 }
 219
 220 const char* userrec::FormatNoticeMasks()
 221 {
 222         static char data[MAXBUF];
 223         int offset = 0;
 224
 225         for (int n = 0; n < 64; n++)
 226         {
 227                 if (snomasks[n])
 228                         data[offset++] = n+65;
 229         }
 230
 231         data[offset] = 0;
 232         return data;
 233 }
 234
 235
 236
 237 bool userrec::IsModeSet(unsigned char m)
 238 {
 239         return (modes[m-65]);
 240 }
 241
 242 void userrec::SetMode(unsigned char m, bool value)
 243 {
 244         modes[m-65] = value;
 245 }
 246
 247 const char* userrec::FormatModes()
 248 {
 249         static char data[MAXBUF];
 250         int offset = 0;
 251         for (int n = 0; n < 64; n++)
 252         {
 253                 if (modes[n])
 254                         data[offset++] = n+65;
 255         }
 256         data[offset] = 0;
 257         return data;
 258 }
 259
 260 userrec::userrec()
 261 {
 262         // the PROPER way to do it, AVOID bzero at *ALL* costs
 263         *password = *nick = *ident = *host = *dhost = *fullname = *awaymsg = *oper = 0;
 264         server = (char*)FindServerNamePtr(ServerInstance->Config->ServerName);
 265         reset_due = TIME;
 266         lines_in = fd = lastping = signon = idle_lastmsg = nping = registered = 0;
 267         timeout = flood = bytes_in = bytes_out = cmds_in = cmds_out = 0;
 268         haspassed = dns_done = false;
 269         recvq = "";
 270         sendq = "";
 271         WriteError = "";
 272         res_forward = res_reverse = NULL;
 273         ip = NULL;
 274         chans.clear();
 275         invites.clear();
 276         chans.resize(MAXCHANS);
 277         memset(modes,0,sizeof(modes));
 278
 279         for (unsigned int n = 0; n < MAXCHANS; n++)
 280         {
 281                 ucrec* x = new ucrec();
 282                 chans[n] = x;
 283                 x->channel = NULL;
 284                 x->uc_modes = 0;
 285         }
 286 }
 287
 288 userrec::~userrec()
 289 {
 290         for (std::vector<ucrec*>::iterator n = chans.begin(); n != chans.end(); n++)
 291         {
 292                 ucrec* x = (ucrec*)*n;
 293                 delete x;
 294         }
 295
 296         if (ip)
 297         {
 298                 if (this->GetProtocolFamily() == AF_INET)
 299                 {
 300                         delete (sockaddr_in*)ip;
 301                 }
 302 #ifdef SUPPORT_IP6LINKS
 303                 else
 304                 {
 305                         delete (sockaddr_in6*)ip;
 306                 }
 307 #endif
 308         }
 309 }
 310
 311 /* XXX - minor point, other *Host functions return a char *, this one creates it. Might be nice to be consistant? */
 312 void userrec::MakeHost(char* nhost)
 313 {
 314         /* This is much faster than snprintf */
 315         char* t = nhost;
 316         for(char* n = ident; *n; n++)
 317                 *t++ = *n;
 318         *t++ = '@';
 319         for(char* n = host; *n; n++)
 320                 *t++ = *n;
 321         *t = 0;
 322 }
 323
 324 void userrec::CloseSocket()
 325 {
 326         shutdown(this->fd,2);
 327         close(this->fd);
 328 }
 329
 330 char* userrec::GetFullHost()
 331 {
 332         static char result[MAXBUF];
 333         char* t = result;
 334         for(char* n = nick; *n; n++)
 335                 *t++ = *n;
 336         *t++ = '!';
 337         for(char* n = ident; *n; n++)
 338                 *t++ = *n;
 339         *t++ = '@';
 340         for(char* n = dhost; *n; n++)
 341                 *t++ = *n;
 342         *t = 0;
 343         return result;
 344 }
 345
 346 char* userrec::MakeWildHost()
 347 {
 348         static char nresult[MAXBUF];
 349         char* t = nresult;
 350         *t++ = '*';     *t++ = '!';
 351         *t++ = '*';     *t++ = '@';
 352         for(char* n = dhost; *n; n++)
 353                 *t++ = *n;
 354         *t = 0;
 355         return nresult;
 356 }
 357
 358 int userrec::ReadData(void* buffer, size_t size)
 359 {
 360         if (this->fd > -1)
 361         {
 362                 return read(this->fd, buffer, size);
 363         }
 364         else
 365                 return 0;
 366 }
 367
 368
 369 char* userrec::GetFullRealHost()
 370 {
 371         static char fresult[MAXBUF];
 372         char* t = fresult;
 373         for(char* n = nick; *n; n++)
 374                 *t++ = *n;
 375         *t++ = '!';
 376         for(char* n = ident; *n; n++)
 377                 *t++ = *n;
 378         *t++ = '@';
 379         for(char* n = host; *n; n++)
 380                 *t++ = *n;
 381         *t = 0;
 382         return fresult;
 383 }
 384
 385 bool userrec::IsInvited(irc::string &channel)
 386 {
 387         for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 388         {
 389                 irc::string compare = i->channel;
 390
 391                 if (compare == channel)
 392                 {
 393                         return true;
 394                 }
 395         }
 396         return false;
 397 }
 398
 399 InvitedList* userrec::GetInviteList()
 400 {
 401         return &invites;
 402 }
 403
 404 void userrec::InviteTo(irc::string &channel)
 405 {
 406         Invited i;
 407         i.channel = channel;
 408         invites.push_back(i);
 409 }
 410
 411 void userrec::RemoveInvite(irc::string &channel)
 412 {
 413         log(DEBUG,"Removing invites");
 414
 415         if (invites.size())
 416         {
 417                 for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 418                 {
 419                         irc::string compare = i->channel;
 420
 421                         if (compare == channel)
 422                         {
 423                                 invites.erase(i);
 424                                 return;
 425                         }
 426                 }
 427         }
 428 }
 429
 430 bool userrec::HasPermission(const std::string &command)
 431 {
 432         char* mycmd;
 433         char* savept;
 434         char* savept2;
 435
 436         /*
 437          * users on remote servers can completely bypass all permissions based checks.
 438          * This prevents desyncs when one server has different type/class tags to another.
 439          * That having been said, this does open things up to the possibility of source changes
 440          * allowing remote kills, etc - but if they have access to the src, they most likely have
 441          * access to the conf - so it's an end to a means either way.
 442          */
 443         if (!IS_LOCAL(this))
 444                 return true;
 445
 446         // are they even an oper at all?
 447         if (*this->oper)
 448         {
 449                 opertype_t::iterator iter_opertype = opertypes.find(this->oper);
 450                 if (iter_opertype != opertypes.end())
 451                 {
 452                         char* Classes = strdup(iter_opertype->second);
 453                         char* myclass = strtok_r(Classes," ",&savept);
 454                         while (myclass)
 455                         {
 456                                 operclass_t::iterator iter_operclass = operclass.find(myclass);
 457                                 if (iter_operclass != operclass.end())
 458                                 {
 459                                         char* CommandList = strdup(iter_operclass->second);
 460                                         mycmd = strtok_r(CommandList," ",&savept2);
 461                                         while (mycmd)
 462                                         {
 463                                                 if ((!strcasecmp(mycmd,command.c_str())) || (*mycmd == '*'))
 464                                                 {
 465                                                         free(Classes);
 466                                                         free(CommandList);
 467                                                         return true;
 468                                                 }
 469                                                 mycmd = strtok_r(NULL," ",&savept2);
 470                                         }
 471                                         free(CommandList);
 472                                 }
 473                                 myclass = strtok_r(NULL," ",&savept);
 474                         }
 475                         free(Classes);
 476                 }
 477         }
 478         return false;
 479 }
 480
 481
 482 bool userrec::AddBuffer(const std::string &a)
 483 {
 484         std::string b = "";
 485
 486         /* NB: std::string is arsey about \r and \n and tries to translate them
 487          * somehow, so we CANNOT use std::string::find() here :(
 488          */
 489         for (std::string::const_iterator i = a.begin(); i != a.end(); i++)
 490         {
 491                 if (*i != '\r')
 492                         b += *i;
 493         }
 494
 495         if (b.length())
 496                 recvq.append(b);
 497
 498         if (recvq.length() > (unsigned)this->recvqmax)
 499         {
 500                 this->SetWriteError("RecvQ exceeded");
 501                 WriteOpers("*** User %s RecvQ of %d exceeds connect class maximum of %d",this->nick,recvq.length(),this->recvqmax);
 502                 return false;
 503         }
 504
 505         return true;
 506 }
 507
 508 bool userrec::BufferIsReady()
 509 {
 510         return (recvq.find('\n') != std::string::npos);
 511 }
 512
 513 void userrec::ClearBuffer()
 514 {
 515         recvq = "";
 516 }
 517
 518 std::string userrec::GetBuffer()
 519 {
 520         if (!recvq.length())
 521                 return "";
 522
 523         /* Strip any leading \r or \n off the string.
 524          * Usually there are only one or two of these,
 525          * so its is computationally cheap to do.
 526          */
 527         while ((*recvq.begin() == '\r') || (*recvq.begin() == '\n'))
 528                 recvq.erase(recvq.begin());
 529
 530         for (std::string::iterator x = recvq.begin(); x != recvq.end(); x++)
 531         {
 532                 /* Find the first complete line, return it as the
 533                  * result, and leave the recvq as whats left
 534                  */
 535                 if (*x == '\n')
 536                 {
 537                         std::string ret = std::string(recvq.begin(), x);
 538                         recvq.erase(recvq.begin(), x + 1);
 539                         return ret;
 540                 }
 541         }
 542         return "";
 543 }
 544
 545 void userrec::AddWriteBuf(const std::string &data)
 546 {
 547         if (*this->GetWriteError())
 548                 return;
 549
 550         if (sendq.length() + data.length() > (unsigned)this->sendqmax)
 551         {
 552                 /*
 553                  * Fix by brain - Set the error text BEFORE calling writeopers, because
 554                  * if we dont it'll recursively  call here over and over again trying
 555                  * to repeatedly add the text to the sendq!
 556                  */
 557                 this->SetWriteError("SendQ exceeded");
 558                 WriteOpers("*** User %s SendQ of %d exceeds connect class maximum of %d",this->nick,sendq.length() + data.length(),this->sendqmax);
 559                 return;
 560         }
 561
 562         if (data.length() > 512)
 563         {
 564                 std::string newdata(data);
 565                 newdata.resize(510);
 566                 newdata.append("\r\n");
 567                 sendq.append(newdata);
 568         }
 569         else
 570         {
 571                 sendq.append(data);
 572         }
 573 }
 574
 575 // send AS MUCH OF THE USERS SENDQ as we are able to (might not be all of it)
 576 void userrec::FlushWriteBuf()
 577 {
 578         if ((sendq.length()) && (this->fd != FD_MAGIC_NUMBER))
 579         {
 580                 const char* tb = this->sendq.c_str();
 581                 int n_sent = write(this->fd,tb,this->sendq.length());
 582                 if (n_sent == -1)
 583                 {
 584                         if (errno != EAGAIN)
 585                                 this->SetWriteError(strerror(errno));
 586                 }
 587                 else
 588                 {
 589                         // advance the queue
 590                         tb += n_sent;
 591                         this->sendq = tb;
 592                         // update the user's stats counters
 593                         this->bytes_out += n_sent;
 594                         this->cmds_out++;
 595                 }
 596         }
 597 }
 598
 599 void userrec::SetWriteError(const std::string &error)
 600 {
 601         log(DEBUG,"SetWriteError: %s",error.c_str());
 602         // don't try to set the error twice, its already set take the first string.
 603         if (!this->WriteError.length())
 604         {
 605                 log(DEBUG,"Setting error string for %s to '%s'",this->nick,error.c_str());
 606                 this->WriteError = error;
 607         }
 608 }
 609
 610 const char* userrec::GetWriteError()
 611 {
 612         return this->WriteError.c_str();
 613 }
 614
 615 void userrec::Oper(const std::string &opertype)
 616 {
 617         this->modes[UM_OPERATOR] = 1;
 618         this->WriteServ("MODE %s :+o", this->nick);
 619         FOREACH_MOD(I_OnOper, OnOper(this, opertype));
 620         log(DEFAULT,"OPER: %s!%s@%s opered as type: %s", this->nick, this->ident, this->host, opertype.c_str());
 621         strlcpy(this->oper, opertype.c_str(), NICKMAX - 1);
 622         all_opers.push_back(this);
 623         FOREACH_MOD(I_OnPostOper,OnPostOper(this, opertype));
 624 }
 625
 626 void userrec::UnOper()
 627 {
 628         if (*this->oper)
 629         {
 630                 *this->oper = 0;
 631                 this->modes[UM_OPERATOR] = 0;
 632                 for (std::vector<userrec*>::iterator a = all_opers.begin(); a < all_opers.end(); a++)
 633                 {
 634                         if (*a == this)
 635                         {
 636                                 log(DEBUG,"Oper removed from optimization list");
 637                                 all_opers.erase(a);
 638                                 return;
 639                         }
 640                 }
 641         }
 642 }
 643
 644 void userrec::QuitUser(userrec *user,const std::string &quitreason)
 645 {
 646         user_hash::iterator iter = clientlist.find(user->nick);
 647
 648 /*
 649  * I'm pretty sure returning here is causing a desync when part of the net thinks a user is gone,
 650  * and another part doesn't. We want to broadcast the quit/kill before bailing so the net stays in sync.
 651  *
 652  * I can't imagine this blowing up, so I'm commenting it out. We still check
 653  * before playing with a bad iterator below in our if(). DISCUSS THIS BEFORE YOU DO ANYTHING. --w00t
 654  *
 655  *      if (iter == clientlist.end())
 656  *              return;
 657  */
 658         std::string reason = quitreason;
 659
 660         if (reason.length() > MAXQUIT - 1)
 661                 reason.resize(MAXQUIT - 1);
 662
 663         if (IS_LOCAL(user))
 664                 user->Write("ERROR :Closing link (%s@%s) [%s]",user->ident,user->host,reason.c_str());
 665
 666         if (user->registered == REG_ALL)
 667         {
 668                 purge_empty_chans(user);
 669                 FOREACH_MOD(I_OnUserQuit,OnUserQuit(user,reason));
 670                 user->WriteCommonExcept("QUIT :%s",reason.c_str());
 671         }
 672
 673         if (IS_LOCAL(user))
 674                 user->FlushWriteBuf();
 675
 676         FOREACH_MOD(I_OnUserDisconnect,OnUserDisconnect(user));
 677
 678         if (IS_LOCAL(user))
 679         {
 680                 if (ServerInstance->Config->GetIOHook(user->GetPort()))
 681                 {
 682                         try
 683                         {
 684                                 ServerInstance->Config->GetIOHook(user->GetPort())->OnRawSocketClose(user->fd);
 685                         }
 686                         catch (ModuleException& modexcept)
 687                         {
 688                                 log(DEBUG,"Module exception cought: %s",modexcept.GetReason());
 689                         }
 690                 }
 691
 692                 ServerInstance->SE->DelFd(user->fd);
 693                 user->CloseSocket();
 694         }
 695
 696         /*
 697          * this must come before the WriteOpers so that it doesnt try to fill their buffer with anything
 698          * if they were an oper with +s.
 699          *
 700          * XXX -
 701          * In the current implementation, we only show local quits, as we only show local connects. With
 702          * the proposed implmentation of snomasks however, this will likely change in the (near?) future.
 703          */
 704         if (user->registered == REG_ALL)
 705         {
 706                 if (IS_LOCAL(user))
 707                         WriteOpers("*** Client exiting: %s!%s@%s [%s]",user->nick,user->ident,user->host,reason.c_str());
 708                 user->AddToWhoWas();
 709         }
 710
 711         if (iter != clientlist.end())
 712         {
 713                 log(DEBUG,"deleting user hash value %lx",(unsigned long)user);
 714                 if (IS_LOCAL(user))
 715                 {
 716                         ServerInstance->fd_ref_table[user->fd] = NULL;
 717                         if (find(local_users.begin(),local_users.end(),user) != local_users.end())
 718                                 local_users.erase(find(local_users.begin(),local_users.end(),user));
 719                 }
 720                 clientlist.erase(iter);
 721                 DELETE(user);
 722         }
 723 }
 724
 725 namespace irc
 726 {
 727         namespace whowas
 728         {
 729
 730                 WhoWasGroup::WhoWasGroup(userrec* user) : host(NULL), dhost(NULL), ident(NULL), server(NULL), gecos(NULL), signon(user->signon)
 731                 {
 732                         this->host = strdup(user->host);
 733                         this->dhost = strdup(user->dhost);
 734                         this->ident = strdup(user->ident);
 735                         this->server = user->server;
 736                         this->gecos = strdup(user->fullname);
 737                 }
 738
 739                 WhoWasGroup::~WhoWasGroup()
 740                 {
 741                         if (host)
 742                                 free(host);
 743                         if (dhost)
 744                                 free(dhost);
 745                         if (ident)
 746                                 free(ident);
 747                         if (gecos)
 748                                 free(gecos);
 749                 }
 750
 751                 /* every hour, run this function which removes all entries over 3 days */
 752                 void MaintainWhoWas(time_t TIME)
 753                 {
 754                         for (whowas_users::iterator iter = ::whowas.begin(); iter != ::whowas.end(); iter++)
 755                         {
 756                                 whowas_set* n = (whowas_set*)iter->second;
 757                                 if (n->size())
 758                                 {
 759                                         while ((n->begin() != n->end()) && ((*n->begin())->signon < TIME - 259200)) // 3 days
 760                                         {
 761                                                 WhoWasGroup *a = *(n->begin());
 762                                                 DELETE(a);
 763                                                 n->erase(n->begin());
 764                                         }
 765                                 }
 766                         }
 767                 }
 768         };
 769 };
 770
 771 /* adds or updates an entry in the whowas list */
 772 void userrec::AddToWhoWas()
 773 {
 774         irc::whowas::whowas_users::iterator iter = whowas.find(this->nick);
 775
 776         if (iter == whowas.end())
 777         {
 778                 irc::whowas::whowas_set* n = new irc::whowas::whowas_set;
 779                 irc::whowas::WhoWasGroup *a = new irc::whowas::WhoWasGroup(this);
 780                 n->push_back(a);
 781                 whowas[this->nick] = n;
 782         }
 783         else
 784         {
 785                 irc::whowas::whowas_set* group = (irc::whowas::whowas_set*)iter->second;
 786
 787                 if (group->size() > 10)
 788                 {
 789                         irc::whowas::WhoWasGroup *a = (irc::whowas::WhoWasGroup*)*(group->begin());
 790                         DELETE(a);
 791                         group->pop_front();
 792                 }
 793
 794                 irc::whowas::WhoWasGroup *a = new irc::whowas::WhoWasGroup(this);
 795                 group->push_back(a);
 796         }
 797 }
 798
 799 /* add a client connection to the sockets list */
 800 void userrec::AddClient(int socket, int port, bool iscached, insp_inaddr ip)
 801 {
 802         std::string tempnick = ConvToStr(socket) + "-unknown";
 803         user_hash::iterator iter = clientlist.find(tempnick);
 804         const char *ipaddr = insp_ntoa(ip);
 805         userrec* _new;
 806         int j = 0;
 807
 808         /*
 809          * fix by brain.
 810          * as these nicknames are 'RFC impossible', we can be sure nobody is going to be
 811          * using one as a registered connection. As they are per fd, we can also safely assume
 812          * that we wont have collisions. Therefore, if the nick exists in the list, its only
 813          * used by a dead socket, erase the iterator so that the new client may reclaim it.
 814          * this was probably the cause of 'server ignores me when i hammer it with reconnects'
 815          * issue in earlier alphas/betas
 816          */
 817         if (iter != clientlist.end())
 818         {
 819                 userrec* goner = iter->second;
 820                 DELETE(goner);
 821                 clientlist.erase(iter);
 822         }
 823
 824         log(DEBUG,"AddClient: %d %d %s",socket,port,ipaddr);
 825
 826         _new = new userrec();
 827         clientlist[tempnick] = _new;
 828         _new->fd = socket;
 829         strlcpy(_new->nick,tempnick.c_str(),NICKMAX-1);
 830
 831         _new->server = FindServerNamePtr(ServerInstance->Config->ServerName);
 832         /* We don't need range checking here, we KNOW 'unknown\0' will fit into the ident field. */
 833         strcpy(_new->ident, "unknown");
 834
 835         _new->registered = REG_NONE;
 836         _new->signon = TIME + ServerInstance->Config->dns_timeout;
 837         _new->lastping = 1;
 838
 839         log(DEBUG,"Setting socket addresses");
 840         _new->SetSockAddr(AF_FAMILY, ipaddr, port);
 841         log(DEBUG,"Socket addresses set.");
 842
 843         /* Smarter than your average bear^H^H^H^Hset of strlcpys. */
 844         for (const char* temp = _new->GetIPString(); *temp && j < 64; temp++, j++)
 845                 _new->dhost[j] = _new->host[j] = *temp;
 846         _new->dhost[j] = _new->host[j] = 0;
 847
 848         // set the registration timeout for this user
 849         unsigned long class_regtimeout = 90;
 850         int class_flood = 0;
 851         long class_threshold = 5;
 852         long class_sqmax = 262144;      // 256kb
 853         long class_rqmax = 4096;        // 4k
 854
 855         for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
 856         {
 857                 if ((i->type == CC_ALLOW) && (match(ipaddr,i->host.c_str(),true)))
 858                 {
 859                         class_regtimeout = (unsigned long)i->registration_timeout;
 860                         class_flood = i->flood;
 861                         _new->pingmax = i->pingtime;
 862                         class_threshold = i->threshold;
 863                         class_sqmax = i->sendqmax;
 864                         class_rqmax = i->recvqmax;
 865                         break;
 866                 }
 867         }
 868
 869         _new->nping = TIME + _new->pingmax + ServerInstance->Config->dns_timeout;
 870         _new->timeout = TIME+class_regtimeout;
 871         _new->flood = class_flood;
 872         _new->threshold = class_threshold;
 873         _new->sendqmax = class_sqmax;
 874         _new->recvqmax = class_rqmax;
 875
 876         ServerInstance->fd_ref_table[socket] = _new;
 877         local_users.push_back(_new);
 878
 879         if (local_users.size() > ServerInstance->Config->SoftLimit)
 880         {
 881                 userrec::QuitUser(_new,"No more connections allowed");
 882                 return;
 883         }
 884
 885         if (local_users.size() >= MAXCLIENTS)
 886         {
 887                 userrec::QuitUser(_new,"No more connections allowed");
 888                 return;
 889         }
 890
 891         /*
 892          * XXX -
 893          * this is done as a safety check to keep the file descriptors within range of fd_ref_table.
 894          * its a pretty big but for the moment valid assumption:
 895          * file descriptors are handed out starting at 0, and are recycled as theyre freed.
 896          * therefore if there is ever an fd over 65535, 65536 clients must be connected to the
 897          * irc server at once (or the irc server otherwise initiating this many connections, files etc)
 898          * which for the time being is a physical impossibility (even the largest networks dont have more
 899          * than about 10,000 users on ONE server!)
 900          */
 901         if ((unsigned)socket >= MAX_DESCRIPTORS)
 902         {
 903                 userrec::QuitUser(_new,"Server is full");
 904                 return;
 905         }
 906         char* e = matches_exception(ipaddr);
 907         if (!e)
 908         {
 909                 char* r = matches_zline(ipaddr);
 910                 if (r)
 911                 {
 912                         char reason[MAXBUF];
 913                         snprintf(reason,MAXBUF,"Z-Lined: %s",r);
 914                         userrec::QuitUser(_new,reason);
 915                         return;
 916                 }
 917         }
 918
 919         if (socket > -1)
 920         {
 921                 if (!ServerInstance->SE->AddFd(socket,true,X_ESTAB_CLIENT))
 922                 {
 923                         userrec::QuitUser(_new, "Internal error handling connection");
 924                         return;
 925                 }
 926         }
 927
 928         _new->WriteServ("NOTICE Auth :*** Looking up your hostname...");
 929 }
 930
 931 long userrec::GlobalCloneCount()
 932 {
 933         char u1[1024];
 934         char u2[1024];
 935         long x = 0;
 936         for (user_hash::const_iterator a = clientlist.begin(); a != clientlist.end(); a++)
 937         {
 938                 /* We have to match ip's as strings - we don't know what protocol
 939                  * a remote user may be using
 940                  */
 941                 if (!strcasecmp(a->second->GetIPString(u1), this->GetIPString(u2)))
 942                                 x++;
 943         }
 944         return x;
 945 }
 946
 947 long userrec::LocalCloneCount()
 948 {
 949         long x = 0;
 950         for (std::vector<userrec*>::const_iterator a = local_users.begin(); a != local_users.end(); a++)
 951         {
 952                 userrec* comp = *a;
 953 #ifdef IPV6
 954                 /* I dont think theres any faster way of matching two ipv6 addresses than memcmp */
 955                 in6_addr* s1 = &(((sockaddr_in6*)comp->ip)->sin6_addr);
 956                 in6_addr* s2 = &(((sockaddr_in6*)this->ip)->sin6_addr);
 957                 if (!memcmp(s1->s6_addr, s2->s6_addr, sizeof(in6_addr)))
 958                         x++;
 959 #else
 960                 in_addr* s1 = &((sockaddr_in*)comp->ip)->sin_addr;
 961                 in_addr* s2 = &((sockaddr_in*)this->ip)->sin_addr;
 962                 if (s1->s_addr == s2->s_addr)
 963                         x++;
 964 #endif
 965         }
 966         return x;
 967 }
 968
 969 void userrec::FullConnect(CullList* Goners)
 970 {
 971         ServerInstance->stats->statsConnects++;
 972         this->idle_lastmsg = TIME;
 973
 974         ConnectClass a = GetClass(this);
 975
 976         if (a.type == CC_DENY)
 977         {
 978                 Goners->AddItem(this,"Unauthorised connection");
 979                 return;
 980         }
 981
 982         if ((*(a.pass.c_str())) && (!this->haspassed))
 983         {
 984                 Goners->AddItem(this,"Invalid password");
 985                 return;
 986         }
 987
 988         if (this->LocalCloneCount() > a.maxlocal)
 989         {
 990                 Goners->AddItem(this, "No more connections allowed from your host via this connect class (local)");
 991                 WriteOpers("*** WARNING: maximum LOCAL connections (%ld) exceeded for IP %s", a.maxlocal, this->GetIPString());
 992                 return;
 993         }
 994         else if (this->GlobalCloneCount() > a.maxglobal)
 995         {
 996                 Goners->AddItem(this, "No more connections allowed from your host via this connect class (global)");
 997                 WriteOpers("*** WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s",a.maxglobal, this->GetIPString());
 998                 return;
 999         }
1000
1001         char match_against[MAXBUF];
1002         snprintf(match_against,MAXBUF,"%s@%s", this->ident, this->host);
1003         char* e = matches_exception(match_against);
1004
1005         if (!e)
1006         {
1007                 char* r = matches_gline(match_against);
1008
1009                 if (r)
1010                 {
1011                         char reason[MAXBUF];
1012                         snprintf(reason,MAXBUF,"G-Lined: %s",r);
1013                         Goners->AddItem(this, reason);
1014                         return;
1015                 }
1016
1017                 r = matches_kline(match_against);
1018
1019                 if (r)
1020                 {
1021                         char reason[MAXBUF];
1022                         snprintf(reason,MAXBUF,"K-Lined: %s",r);
1023                         Goners->AddItem(this, reason);
1024                         return;
1025                 }
1026         }
1027
1028
1029         this->WriteServ("NOTICE Auth :Welcome to \002%s\002!",ServerInstance->Config->Network);
1030         this->WriteServ("001 %s :Welcome to the %s IRC Network %s!%s@%s",this->nick, ServerInstance->Config->Network, this->nick, this->ident, this->host);
1031         this->WriteServ("002 %s :Your host is %s, running version %s",this->nick,ServerInstance->Config->ServerName,VERSION);
1032         this->WriteServ("003 %s :This server was created %s %s", this->nick, __TIME__, __DATE__);
1033         this->WriteServ("004 %s %s %s %s %s %s", this->nick, ServerInstance->Config->ServerName, VERSION, ServerInstance->ModeGrok->UserModeList().c_str(), ServerInstance->ModeGrok->ChannelModeList().c_str(), ServerInstance->ModeGrok->ParaModeList().c_str());
1034
1035         // anfl @ #ratbox, efnet reminded me that according to the RFC this cant contain more than 13 tokens per line...
1036         // so i'd better split it :)
1037         std::stringstream out(ServerInstance->Config->data005);
1038         std::string token = "";
1039         std::string line5 = "";
1040         int token_counter = 0;
1041
1042         while (!out.eof())
1043         {
1044                 out >> token;
1045                 line5 = line5 + token + " ";
1046                 token_counter++;
1047
1048                 if ((token_counter >= 13) || (out.eof() == true))
1049                 {
1050                         this->WriteServ("005 %s %s:are supported by this server", this->nick, line5.c_str());
1051                         line5 = "";
1052                         token_counter = 0;
1053                 }
1054         }
1055
1056         ShowMOTD(this);
1057
1058         /*
1059          * fix 3 by brain, move registered = 7 below these so that spurious modes and host
1060          * changes dont go out onto the network and produce 'fake direction'.
1061          */
1062         FOREACH_MOD(I_OnUserConnect,OnUserConnect(this));
1063         FOREACH_MOD(I_OnGlobalConnect,OnGlobalConnect(this));
1064         this->registered = REG_ALL;
1065         WriteOpers("*** Client connecting on port %d: %s!%s@%s [%s]", this->GetPort(), this->nick, this->ident, this->host, this->GetIPString());
1066 }
1067
1068 /** userrec::UpdateNick()
1069  * re-allocates a nick in the user_hash after they change nicknames,
1070  * returns a pointer to the new user as it may have moved
1071  */
1072 userrec* userrec::UpdateNickHash(const char* New)
1073 {
1074         //user_hash::iterator newnick;
1075         user_hash::iterator oldnick = clientlist.find(this->nick);
1076
1077         if (!strcasecmp(this->nick,New))
1078                 return oldnick->second;
1079
1080         if (oldnick == clientlist.end())
1081                 return NULL; /* doesnt exist */
1082
1083         userrec* olduser = oldnick->second;
1084         clientlist[New] = olduser;
1085         clientlist.erase(oldnick);
1086         return clientlist[New];
1087 }
1088
1089 bool userrec::ForceNickChange(const char* newnick)
1090 {
1091         char nick[MAXBUF];
1092         int MOD_RESULT = 0;
1093
1094         *nick = 0;
1095
1096         FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(this, newnick));
1097
1098         if (MOD_RESULT)
1099         {
1100                 ServerInstance->stats->statsCollisions++;
1101                 return false;
1102         }
1103
1104         if (matches_qline(newnick))
1105         {
1106                 ServerInstance->stats->statsCollisions++;
1107                 return false;
1108         }
1109
1110         if (newnick)
1111         {
1112                 strlcpy(this->nick, newnick, NICKMAX - 1);
1113         }
1114         if (this->registered == REG_ALL)
1115         {
1116                 const char* pars[1];
1117                 pars[0] = nick;
1118                 std::string cmd = "NICK";
1119                 ServerInstance->Parser->CallHandler(cmd, pars, 1, this);
1120         }
1121         return true;
1122 }
1123
1124 void userrec::SetSockAddr(int protocol_family, const char* ip, int port)
1125 {
1126         switch (protocol_family)
1127         {
1128 #ifdef SUPPORT_IP6LINKS
1129                 case AF_INET6:
1130                 {
1131                         log(DEBUG,"Set inet6 protocol address");
1132                         sockaddr_in6* sin = new sockaddr_in6;
1133                         sin->sin6_family = AF_INET6;
1134                         sin->sin6_port = port;
1135                         inet_pton(AF_INET6, ip, &sin->sin6_addr);
1136                         this->ip = (sockaddr*)sin;
1137                 }
1138                 break;
1139 #endif
1140                 case AF_INET:
1141                 {
1142                         log(DEBUG,"Set inet4 protocol address");
1143                         sockaddr_in* sin = new sockaddr_in;
1144                         sin->sin_family = AF_INET;
1145                         sin->sin_port = port;
1146                         inet_pton(AF_INET, ip, &sin->sin_addr);
1147                         this->ip = (sockaddr*)sin;
1148                 }
1149                 break;
1150                 default:
1151                         log(DEBUG,"Ut oh, I dont know protocol %d to be set on '%s'!", protocol_family, this->nick);
1152                 break;
1153         }
1154 }
1155
1156 int userrec::GetPort()
1157 {
1158         if (this->ip == NULL)
1159                 return 0;
1160
1161         switch (this->GetProtocolFamily())
1162         {
1163 #ifdef SUPPORT_IP6LINKS
1164                 case AF_INET6:
1165                 {
1166                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1167                         return sin->sin6_port;
1168                 }
1169                 break;
1170 #endif
1171                 case AF_INET:
1172                 {
1173                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1174                         return sin->sin_port;
1175                 }
1176                 break;
1177                 default:
1178                         log(DEBUG,"Ut oh, '%s' has an unknown protocol family!",this->nick);
1179                 break;
1180         }
1181         return 0;
1182 }
1183
1184 int userrec::GetProtocolFamily()
1185 {
1186         if (this->ip == NULL)
1187                 return 0;
1188
1189         sockaddr_in* sin = (sockaddr_in*)this->ip;
1190         return sin->sin_family;
1191 }
1192
1193 const char* userrec::GetIPString()
1194 {
1195         static char buf[1024];
1196         static char temp[1024];
1197
1198         if (this->ip == NULL)
1199                 return "";
1200
1201         switch (this->GetProtocolFamily())
1202         {
1203 #ifdef SUPPORT_IP6LINKS
1204                 case AF_INET6:
1205                 {
1206                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1207                         inet_ntop(sin->sin6_family, &sin->sin6_addr, buf, sizeof(buf));
1208                         /* IP addresses starting with a : on irc are a Bad Thing (tm) */
1209                         if (*buf == ':')
1210                         {
1211                                 strlcpy(&temp[1], buf, sizeof(temp));
1212                                 *temp = '0';
1213                                 return temp;
1214                         }
1215                         return buf;
1216                 }
1217                 break;
1218 #endif
1219                 case AF_INET:
1220                 {
1221                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1222                         inet_ntop(sin->sin_family, &sin->sin_addr, buf, sizeof(buf));
1223                         return buf;
1224                 }
1225                 break;
1226                 default:
1227                         log(DEBUG,"Ut oh, '%s' has an unknown protocol family!",this->nick);
1228                 break;
1229         }
1230         return "";
1231 }
1232
1233 const char* userrec::GetIPString(char* buf)
1234 {
1235         static char temp[1024];
1236
1237         if (this->ip == NULL)
1238         {
1239                 *buf = 0;
1240                 return buf;
1241         }
1242
1243         switch (this->GetProtocolFamily())
1244         {
1245 #ifdef SUPPORT_IP6LINKS
1246                 case AF_INET6:
1247                 {
1248                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1249                         inet_ntop(sin->sin6_family, &sin->sin6_addr, buf, sizeof(buf));
1250                         /* IP addresses starting with a : on irc are a Bad Thing (tm) */
1251                         if (*buf == ':')
1252                         {
1253                                 strlcpy(&temp[1], buf, sizeof(temp));
1254                                 *temp = '0';
1255                                 strlcpy(buf, temp, sizeof(temp));
1256                         }
1257                         return buf;
1258                 }
1259                 break;
1260 #endif
1261                 case AF_INET:
1262                 {
1263                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1264                         inet_ntop(sin->sin_family, &sin->sin_addr, buf, sizeof(buf));
1265                         return buf;
1266                 }
1267                 break;
1268
1269                 default:
1270                         log(DEBUG,"Ut oh, '%s' has an unknown protocol family!",this->nick);
1271                 break;
1272         }
1273         return "";
1274 }
1275
1276
1277 void userrec::Write(const std::string &text)
1278 {
1279         if ((this->fd < 0) || (this->fd > MAX_DESCRIPTORS))
1280                 return;
1281
1282         std::string crlf = text;
1283         crlf.append("\r\n");
1284
1285         if (ServerInstance->Config->GetIOHook(this->GetPort()))
1286         {
1287                 try
1288                 {
1289                         ServerInstance->Config->GetIOHook(this->GetPort())->OnRawSocketWrite(this->fd, crlf.data(), crlf.length());
1290                 }
1291                 catch (ModuleException& modexcept)
1292                 {
1293                         log(DEBUG,"Module exception caught: %s",modexcept.GetReason());
1294                 }
1295         }
1296         else
1297         {
1298                 this->AddWriteBuf(crlf);
1299         }
1300         ServerInstance->stats->statsSent += crlf.length();
1301 }
1302
1303 /** Write()
1304  */
1305 void userrec::Write(const char *text, ...)
1306 {
1307         va_list argsPtr;
1308         char textbuffer[MAXBUF];
1309
1310         va_start(argsPtr, text);
1311         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1312         va_end(argsPtr);
1313
1314         this->Write(std::string(textbuffer));
1315 }
1316
1317 void userrec::WriteServ(const std::string& text)
1318 {
1319         char textbuffer[MAXBUF];
1320
1321         snprintf(textbuffer,MAXBUF,":%s %s",ServerInstance->Config->ServerName,text.c_str());
1322         this->Write(std::string(textbuffer));
1323 }
1324
1325 /** WriteServ()
1326  *  Same as Write(), except `text' is prefixed with `:server.name '.
1327  */
1328 void userrec::WriteServ(const char* text, ...)
1329 {
1330         va_list argsPtr;
1331         char textbuffer[MAXBUF];
1332
1333         va_start(argsPtr, text);
1334         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1335         va_end(argsPtr);
1336
1337         this->WriteServ(std::string(textbuffer));
1338 }
1339
1340
1341 void userrec::WriteFrom(userrec *user, const std::string &text)
1342 {
1343         char tb[MAXBUF];
1344
1345         snprintf(tb,MAXBUF,":%s %s",user->GetFullHost(),text.c_str());
1346
1347         this->Write(std::string(tb));
1348 }
1349
1350
1351 /* write text from an originating user to originating user */
1352
1353 void userrec::WriteFrom(userrec *user, const char* text, ...)
1354 {
1355         va_list argsPtr;
1356         char textbuffer[MAXBUF];
1357
1358         va_start(argsPtr, text);
1359         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1360         va_end(argsPtr);
1361
1362         this->WriteFrom(user, std::string(textbuffer));
1363 }
1364
1365
1366 /* write text to an destination user from a source user (e.g. user privmsg) */
1367
1368 void userrec::WriteTo(userrec *dest, const char *data, ...)
1369 {
1370         char textbuffer[MAXBUF];
1371         va_list argsPtr;
1372
1373         va_start(argsPtr, data);
1374         vsnprintf(textbuffer, MAXBUF, data, argsPtr);
1375         va_end(argsPtr);
1376
1377         this->WriteTo(dest, std::string(textbuffer));
1378 }
1379
1380 void userrec::WriteTo(userrec *dest, const std::string &data)
1381 {
1382         dest->WriteFrom(this, data);
1383 }
1384
1385
1386 void userrec::WriteCommon(const char* text, ...)
1387 {
1388         char textbuffer[MAXBUF];
1389         va_list argsPtr;
1390
1391         if (this->registered != REG_ALL)
1392                 return;
1393
1394         va_start(argsPtr, text);
1395         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1396         va_end(argsPtr);
1397
1398         this->WriteCommon(std::string(textbuffer));
1399 }
1400
1401 void userrec::WriteCommon(const std::string &text)
1402 {
1403         bool sent_to_at_least_one = false;
1404
1405         if (this->registered != REG_ALL)
1406                 return;
1407
1408         uniq_id++;
1409
1410         for (std::vector<ucrec*>::const_iterator v = this->chans.begin(); v != this->chans.end(); v++)
1411         {
1412                 ucrec *n = *v;
1413                 if (n->channel)
1414                 {
1415                         CUList *ulist= n->channel->GetUsers();
1416
1417                         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1418                         {
1419                                 if ((IS_LOCAL(i->second)) && (already_sent[i->second->fd] != uniq_id))
1420                                 {
1421                                         already_sent[i->second->fd] = uniq_id;
1422                                         i->second->WriteFrom(this, std::string(text));
1423                                         sent_to_at_least_one = true;
1424                                 }
1425                         }
1426                 }
1427         }
1428
1429         /*
1430          * if the user was not in any channels, no users will receive the text. Make sure the user
1431          * receives their OWN message for WriteCommon
1432          */
1433         if (!sent_to_at_least_one)
1434         {
1435                 this->WriteFrom(this,std::string(text));
1436         }
1437 }
1438
1439
1440 /* write a formatted string to all users who share at least one common
1441  * channel, NOT including the source user e.g. for use in QUIT
1442  */
1443
1444 void userrec::WriteCommonExcept(const char* text, ...)
1445 {
1446         char textbuffer[MAXBUF];
1447         va_list argsPtr;
1448
1449         va_start(argsPtr, text);
1450         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1451         va_end(argsPtr);
1452
1453         this->WriteCommonExcept(std::string(textbuffer));
1454 }
1455
1456 void userrec::WriteCommonExcept(const std::string &text)
1457 {
1458         bool quit_munge = true;
1459         char oper_quit[MAXBUF];
1460         char textbuffer[MAXBUF];
1461
1462         strlcpy(textbuffer, text.c_str(), MAXBUF);
1463
1464         if (this->registered != REG_ALL)
1465                 return;
1466
1467         uniq_id++;
1468
1469         /* TODO: We need some form of WriteCommonExcept that will send two lines, one line to
1470          * opers and the other line to non-opers, then all this hidebans and hidesplits gunk
1471          * can go byebye.
1472          */
1473         if (ServerInstance->Config->HideSplits)
1474         {
1475                 char* check = textbuffer + 6;
1476
1477                 if (!strncasecmp(textbuffer, "QUIT :",6))
1478                 {
1479                         std::stringstream split(check);
1480                         std::string server_one;
1481                         std::string server_two;
1482
1483                         split >> server_one;
1484                         split >> server_two;
1485
1486                         if ((FindServerName(server_one)) && (FindServerName(server_two)))
1487                         {
1488                                 strlcpy(oper_quit,textbuffer,MAXQUIT);
1489                                 strlcpy(check,"*.net *.split",MAXQUIT);
1490                                 quit_munge = true;
1491                         }
1492                 }
1493         }
1494
1495         if ((ServerInstance->Config->HideBans) && (!quit_munge))
1496         {
1497                 if ((!strncasecmp(textbuffer, "QUIT :G-Lined:",14)) || (!strncasecmp(textbuffer, "QUIT :K-Lined:",14))
1498                 || (!strncasecmp(textbuffer, "QUIT :Q-Lined:",14)) || (!strncasecmp(textbuffer, "QUIT :Z-Lined:",14)))
1499                 {
1500                         char* check = textbuffer + 13;
1501                         strlcpy(oper_quit,textbuffer,MAXQUIT);
1502                         *check = 0;  // We don't need to strlcpy, we just chop it from the :
1503                         quit_munge = true;
1504                 }
1505         }
1506
1507         for (std::vector<ucrec*>::const_iterator v = this->chans.begin(); v != this->chans.end(); v++)
1508         {
1509                 ucrec* n = *v;
1510                 if (n->channel)
1511                 {
1512                         CUList *ulist= n->channel->GetUsers();
1513
1514                         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1515                         {
1516                                 if (this != i->second)
1517                                 {
1518                                         if ((IS_LOCAL(i->second)) && (already_sent[i->second->fd] != uniq_id))
1519                                         {
1520                                                 already_sent[i->second->fd] = uniq_id;
1521                                                 if (quit_munge)
1522                                                         i->second->WriteFrom(this, *i->second->oper ? std::string(oper_quit) : std::string(textbuffer));
1523                                                 else
1524                                                         i->second->WriteFrom(this, std::string(textbuffer));
1525                                         }
1526                                 }
1527                         }
1528                 }
1529         }
1530
1531 }
1532
1533 void userrec::WriteWallOps(const std::string &text)
1534 {
1535         /* Does nothing if theyre not opered */
1536         if ((!*this->oper) && (IS_LOCAL(this)))
1537                 return;
1538
1539         std::string wallop = "WALLOPS :";
1540         wallop.append(text);
1541
1542         for (std::vector<userrec*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
1543         {
1544                 userrec* t = *i;
1545                 if ((IS_LOCAL(t)) && (t->modes[UM_WALLOPS]))
1546                         this->WriteTo(t,wallop);
1547         }
1548 }
1549
1550 void userrec::WriteWallOps(const char* text, ...)
1551 {
1552         char textbuffer[MAXBUF];
1553         va_list argsPtr;
1554
1555         va_start(argsPtr, text);
1556         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1557         va_end(argsPtr);
1558
1559         this->WriteWallOps(std::string(textbuffer));
1560 }
1561
1562 /* return 0 or 1 depending if users u and u2 share one or more common channels
1563  * (used by QUIT, NICK etc which arent channel specific notices)
1564  *
1565  * The old algorithm in 1.0 for this was relatively inefficient, iterating over
1566  * the first users channels then the second users channels within the outer loop,
1567  * therefore it was a maximum of x*y iterations (upon returning 0 and checking
1568  * all possible iterations). However this new function instead checks against the
1569  * channel's userlist in the inner loop which is a std::map<userrec*,userrec*>
1570  * and saves us time as we already know what pointer value we are after.
1571  * Don't quote me on the maths as i am not a mathematician or computer scientist,
1572  * but i believe this algorithm is now x+(log y) maximum iterations instead.
1573  */
1574 bool userrec::SharesChannelWith(userrec *other)
1575 {
1576         if ((!other) || (this->registered != REG_ALL) || (other->registered != REG_ALL))
1577                 return false;
1578
1579         /* Outer loop */
1580         for (std::vector<ucrec*>::const_iterator i = this->chans.begin(); i != this->chans.end(); i++)
1581         {
1582                 /* Fetch the channel from the user */
1583                 ucrec* user_channel = *i;
1584
1585                 if (user_channel->channel)
1586                 {
1587                         /* Eliminate the inner loop (which used to be ~equal in size to the outer loop)
1588                          * by replacing it with a map::find which *should* be more efficient
1589                          */
1590                         if (user_channel->channel->HasUser(other))
1591                                 return true;
1592                 }
1593         }
1594         return false;
1595 }
1596
1597 int userrec::CountChannels()
1598 {
1599         int z = 0;
1600         for (std::vector<ucrec*>::const_iterator i = this->chans.begin(); i != this->chans.end(); i++)
1601                 if ((*i)->channel)
1602                         z++;
1603         return z;
1604 }
1605
1606 bool userrec::ChangeName(const char* gecos)
1607 {
1608         if (IS_LOCAL(this))
1609         {
1610                 int MOD_RESULT = 0;
1611                 FOREACH_RESULT(I_OnChangeLocalUserGECOS,OnChangeLocalUserGECOS(this,gecos));
1612                 if (MOD_RESULT)
1613                         return false;
1614                 FOREACH_MOD(I_OnChangeName,OnChangeName(this,gecos));
1615         }
1616         strlcpy(this->fullname,gecos,MAXGECOS+1);
1617         return true;
1618 }
1619
1620 bool userrec::ChangeDisplayedHost(const char* host)
1621 {
1622         if (IS_LOCAL(this))
1623         {
1624                 int MOD_RESULT = 0;
1625                 FOREACH_RESULT(I_OnChangeLocalUserHost,OnChangeLocalUserHost(this,host));
1626                 if (MOD_RESULT)
1627                         return false;
1628                 FOREACH_MOD(I_OnChangeHost,OnChangeHost(this,host));
1629         }
1630         strlcpy(this->dhost,host,63);
1631
1632         if (IS_LOCAL(this))
1633                 this->WriteServ("396 %s %s :is now your hidden host",this->nick,this->dhost);
1634
1635         return true;
1636 }
1637