src/users.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2007 InspIRCd Development Team
   6  * See: http://www.inspircd.org/wiki/index.php/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *            the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 #include "inspircd.h"
  15 #include "configreader.h"
  16 #include "channels.h"
  17 #include "users.h"
  18 #include <stdarg.h>
  19 #include "socketengine.h"
  20 #include "wildcard.h"
  21 #include "xline.h"
  22 #include "commands/cmd_whowas.h"
  23
  24 static unsigned long already_sent[MAX_DESCRIPTORS] = {0};
  25
  26 /* XXX: Used for speeding up WriteCommon operations */
  27 unsigned long uniq_id = 0;
  28
  29 bool InitTypes(ServerConfig* conf, const char* tag)
  30 {
  31         if (conf->opertypes.size())
  32         {
  33                 for (opertype_t::iterator n = conf->opertypes.begin(); n != conf->opertypes.end(); n++)
  34                 {
  35                         if (n->second)
  36                                 delete[] n->second;
  37                 }
  38         }
  39
  40         conf->opertypes.clear();
  41         return true;
  42 }
  43
  44 bool InitClasses(ServerConfig* conf, const char* tag)
  45 {
  46         if (conf->operclass.size())
  47         {
  48                 for (operclass_t::iterator n = conf->operclass.begin(); n != conf->operclass.end(); n++)
  49                 {
  50                         if (n->second)
  51                                 delete[] n->second;
  52                 }
  53         }
  54
  55         conf->operclass.clear();
  56         return true;
  57 }
  58
  59 bool DoType(ServerConfig* conf, const char* tag, char** entries, ValueList &values, int* types)
  60 {
  61         const char* TypeName = values[0].GetString();
  62         const char* Classes = values[1].GetString();
  63
  64         conf->opertypes[TypeName] = strnewdup(Classes);
  65         return true;
  66 }
  67
  68 bool DoClass(ServerConfig* conf, const char* tag, char** entries, ValueList &values, int* types)
  69 {
  70         const char* ClassName = values[0].GetString();
  71         const char* CommandList = values[1].GetString();
  72
  73         conf->operclass[ClassName] = strnewdup(CommandList);
  74         return true;
  75 }
  76
  77 bool DoneClassesAndTypes(ServerConfig* conf, const char* tag)
  78 {
  79         return true;
  80 }
  81
  82 std::string userrec::ProcessNoticeMasks(const char *sm)
  83 {
  84         bool adding = true, oldadding = false;
  85         const char *c = sm;
  86         std::string output;
  87
  88         while (c && *c)
  89         {
  90                 switch (*c)
  91                 {
  92                         case '+':
  93                                 adding = true;
  94                         break;
  95                         case '-':
  96                                 adding = false;
  97                         break;
  98                         case '*':
  99                                 for (unsigned char d = 'A'; d <= 'z'; d++)
 100                                 {
 101                                         if (ServerInstance->SNO->IsEnabled(d))
 102                                         {
 103                                                 if ((!IsNoticeMaskSet(d) && adding) || (IsNoticeMaskSet(d) && !adding))
 104                                                 {
 105                                                         if ((oldadding != adding) || (!output.length()))
 106                                                                 output += (adding ? '+' : '-');
 107
 108                                                         this->SetNoticeMask(d, adding);
 109
 110                                                         output += d;
 111                                                 }
 112                                         }
 113                                         oldadding = adding;
 114                                 }
 115                         break;
 116                         default:
 117                                 if ((*c >= 'A') && (*c <= 'z') && (ServerInstance->SNO->IsEnabled(*c)))
 118                                 {
 119                                         if ((!IsNoticeMaskSet(*c) && adding) || (IsNoticeMaskSet(*c) && !adding))
 120                                         {
 121                                                 if ((oldadding != adding) || (!output.length()))
 122                                                         output += (adding ? '+' : '-');
 123
 124                                                 this->SetNoticeMask(*c, adding);
 125
 126                                                 output += *c;
 127                                         }
 128                                 }
 129                                 oldadding = adding;
 130                         break;
 131                 }
 132
 133                 *c++;
 134         }
 135
 136         return output;
 137 }
 138
 139 void userrec::StartDNSLookup()
 140 {
 141         try
 142         {
 143                 bool cached;
 144                 const char* ip = this->GetIPString();
 145
 146                 /* Special case for 4in6 (Have i mentioned i HATE 4in6?) */
 147                 if (!strncmp(ip, "0::ffff:", 8))
 148                         res_reverse = new UserResolver(this->ServerInstance, this, ip + 8, DNS_QUERY_PTR4, cached);
 149                 else
 150                         res_reverse = new UserResolver(this->ServerInstance, this, ip, this->GetProtocolFamily() == AF_INET ? DNS_QUERY_PTR4 : DNS_QUERY_PTR6, cached);
 151
 152                 this->ServerInstance->AddResolver(res_reverse, cached);
 153         }
 154         catch (CoreException& e)
 155         {
 156                 ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
 157         }
 158 }
 159
 160 UserResolver::UserResolver(InspIRCd* Instance, userrec* user, std::string to_resolve, QueryType qt, bool &cache) :
 161         Resolver(Instance, to_resolve, qt, cache), bound_user(user)
 162 {
 163         this->fwd = (qt == DNS_QUERY_A || qt == DNS_QUERY_AAAA);
 164         this->bound_fd = user->GetFd();
 165 }
 166
 167 void UserResolver::OnLookupComplete(const std::string &result, unsigned int ttl, bool cached, int resultnum)
 168 {
 169         /* We are only interested in the first matching result */
 170         if (resultnum)
 171                 return;
 172
 173         if ((!this->fwd) && (ServerInstance->SE->GetRef(this->bound_fd) == this->bound_user))
 174         {
 175                 this->bound_user->stored_host = result;
 176                 try
 177                 {
 178                         /* Check we didnt time out */
 179                         if (this->bound_user->registered != REG_ALL)
 180                         {
 181                                 bool cached;
 182 #ifdef IPV6
 183                                 if (this->bound_user->GetProtocolFamily() == AF_INET6)
 184                                 {
 185                                         /* IPV6 forward lookup (with possibility of 4in6) */
 186                                         const char* ip = this->bound_user->GetIPString();
 187                                         bound_user->res_forward = new UserResolver(this->ServerInstance, this->bound_user, result, (!strncmp(ip, "0::ffff:", 8) ? DNS_QUERY_A : DNS_QUERY_AAAA), cached);
 188                                 }
 189                                 else
 190                                         /* IPV4 lookup (mixed protocol mode) */
 191 #endif
 192                                 /* IPV4 lookup (ipv4 only mode) */
 193                                 bound_user->res_forward = new UserResolver(this->ServerInstance, this->bound_user, result, DNS_QUERY_A, cached);
 194                                 this->ServerInstance->AddResolver(bound_user->res_forward, cached);
 195                         }
 196                 }
 197                 catch (CoreException& e)
 198                 {
 199                         ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
 200                 }
 201         }
 202         else if ((this->fwd) && (ServerInstance->SE->GetRef(this->bound_fd) == this->bound_user))
 203         {
 204                 /* Both lookups completed */
 205                 std::string result2("0::ffff:");
 206                 result2.append(result);
 207                 if (this->bound_user->GetIPString() == result || this->bound_user->GetIPString() == result2)
 208                 {
 209                         std::string hostname = this->bound_user->stored_host;
 210                         if (hostname.length() < 65)
 211                         {
 212                                 /* Check we didnt time out */
 213                                 if ((this->bound_user->registered != REG_ALL) && (!this->bound_user->dns_done))
 214                                 {
 215                                         /* Hostnames starting with : are not a good thing (tm) */
 216                                         if (*(hostname.c_str()) == ':')
 217                                                 hostname.insert(0, "0");
 218
 219                                         this->bound_user->WriteServ("NOTICE Auth :*** Found your hostname (%s)%s", hostname.c_str(), (cached ? " -- cached" : ""));
 220                                         this->bound_user->dns_done = true;
 221                                         strlcpy(this->bound_user->dhost, hostname.c_str(),64);
 222                                         strlcpy(this->bound_user->host, hostname.c_str(),64);
 223                                         /* Invalidate cache */
 224                                         this->bound_user->InvalidateCache();
 225                                 }
 226                         }
 227                         else
 228                         {
 229                                 if (!this->bound_user->dns_done)
 230                                 {
 231                                         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());
 232                                         this->bound_user->dns_done = true;
 233                                 }
 234                         }
 235                 }
 236                 else
 237                 {
 238                         if (!this->bound_user->dns_done)
 239                         {
 240                                 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());
 241                                 this->bound_user->dns_done = true;
 242                         }
 243                 }
 244         }
 245 }
 246
 247 void UserResolver::OnError(ResolverError e, const std::string &errormessage)
 248 {
 249         if (ServerInstance->SE->GetRef(this->bound_fd) == this->bound_user)
 250         {
 251                 /* Since dns timeout is implemented outside of the resolver, this was a race condition that could result in this message being sent *after*
 252                  * the user was fully connected. This check fixes that issue  - Special */
 253                 if (!this->bound_user->dns_done)
 254                 {
 255                         /* Error message here */
 256                         this->bound_user->WriteServ("NOTICE Auth :*** Could not resolve your hostname: %s; using your IP address (%s) instead.", errormessage.c_str(), this->bound_user->GetIPString());
 257                         this->bound_user->dns_done = true;
 258                 }
 259         }
 260 }
 261
 262
 263 bool userrec::IsNoticeMaskSet(unsigned char sm)
 264 {
 265         return (snomasks[sm-65]);
 266 }
 267
 268 void userrec::SetNoticeMask(unsigned char sm, bool value)
 269 {
 270         snomasks[sm-65] = value;
 271 }
 272
 273 const char* userrec::FormatNoticeMasks()
 274 {
 275         static char data[MAXBUF];
 276         int offset = 0;
 277
 278         for (int n = 0; n < 64; n++)
 279         {
 280                 if (snomasks[n])
 281                         data[offset++] = n+65;
 282         }
 283
 284         data[offset] = 0;
 285         return data;
 286 }
 287
 288
 289
 290 bool userrec::IsModeSet(unsigned char m)
 291 {
 292         return (modes[m-65]);
 293 }
 294
 295 void userrec::SetMode(unsigned char m, bool value)
 296 {
 297         modes[m-65] = value;
 298 }
 299
 300 const char* userrec::FormatModes()
 301 {
 302         static char data[MAXBUF];
 303         int offset = 0;
 304         for (int n = 0; n < 64; n++)
 305         {
 306                 if (modes[n])
 307                         data[offset++] = n+65;
 308         }
 309         data[offset] = 0;
 310         return data;
 311 }
 312
 313 void userrec::DecrementModes()
 314 {
 315         for (int n = 0; n < 64; n++)
 316         {
 317                 if (modes[n])
 318                 {
 319                         ModeHandler* mh = ServerInstance->Modes->FindMode(n+65, MODETYPE_USER);
 320                         if (mh)
 321                                 mh->ChangeCount(-1);
 322                 }
 323         }
 324 }
 325
 326 userrec::userrec(InspIRCd* Instance, const std::string &uid) : ServerInstance(Instance)
 327 {
 328         *password = *nick = *ident = *host = *dhost = *fullname = *awaymsg = *oper = *uuid = 0;
 329         server = (char*)Instance->FindServerNamePtr(Instance->Config->ServerName);
 330         reset_due = ServerInstance->Time();
 331         age = ServerInstance->Time(true);
 332         lines_in = lastping = signon = idle_lastmsg = nping = registered = 0;
 333         ChannelCount = timeout = flood = bytes_in = bytes_out = cmds_in = cmds_out = 0;
 334         muted = exempt = haspassed = dns_done = false;
 335         fd = -1;
 336         recvq.clear();
 337         sendq.clear();
 338         WriteError.clear();
 339         res_forward = res_reverse = NULL;
 340         Visibility = NULL;
 341         ip = NULL;
 342         chans.clear();
 343         invites.clear();
 344         memset(modes,0,sizeof(modes));
 345         memset(snomasks,0,sizeof(snomasks));
 346         /* Invalidate cache */
 347         operquit = cached_fullhost = cached_hostip = cached_makehost = cached_fullrealhost = NULL;
 348         if (!uid.empty())
 349                 strlcpy(uuid, uid.c_str(), UUID_LENGTH);
 350
 351         user_hash::iterator finduuid = Instance->uuidlist->find(uuid);
 352         if (finduuid != Instance->uuidlist->end())
 353                 (*Instance->uuidlist)[uuid] = this;
 354         else
 355                 throw CoreException("Duplicate UUID "+uid+" in userrec constructor");
 356 }
 357
 358 void userrec::RemoveCloneCounts()
 359 {
 360         clonemap::iterator x = ServerInstance->local_clones.find(this->GetIPString());
 361         if (x != ServerInstance->local_clones.end())
 362         {
 363                 x->second--;
 364                 if (!x->second)
 365                 {
 366                         ServerInstance->local_clones.erase(x);
 367                 }
 368         }
 369
 370         clonemap::iterator y = ServerInstance->global_clones.find(this->GetIPString());
 371         if (y != ServerInstance->global_clones.end())
 372         {
 373                 y->second--;
 374                 if (!y->second)
 375                 {
 376                         ServerInstance->global_clones.erase(y);
 377                 }
 378         }
 379 }
 380
 381 userrec::~userrec()
 382 {
 383         this->InvalidateCache();
 384         this->DecrementModes();
 385         if (operquit)
 386                 free(operquit);
 387         if (ip)
 388         {
 389                 this->RemoveCloneCounts();
 390
 391                 if (this->GetProtocolFamily() == AF_INET)
 392                 {
 393                         delete (sockaddr_in*)ip;
 394                 }
 395 #ifdef SUPPORT_IP6LINKS
 396                 else
 397                 {
 398                         delete (sockaddr_in6*)ip;
 399                 }
 400 #endif
 401         }
 402
 403         ServerInstance->uuidlist->erase(uuid);
 404 }
 405
 406 char* userrec::MakeHost()
 407 {
 408         if (this->cached_makehost)
 409                 return this->cached_makehost;
 410
 411         char nhost[MAXBUF];
 412         /* This is much faster than snprintf */
 413         char* t = nhost;
 414         for(char* n = ident; *n; n++)
 415                 *t++ = *n;
 416         *t++ = '@';
 417         for(char* n = host; *n; n++)
 418                 *t++ = *n;
 419         *t = 0;
 420
 421         this->cached_makehost = strdup(nhost);
 422
 423         return this->cached_makehost;
 424 }
 425
 426 char* userrec::MakeHostIP()
 427 {
 428         if (this->cached_hostip)
 429                 return this->cached_hostip;
 430
 431         char ihost[MAXBUF];
 432         /* This is much faster than snprintf */
 433         char* t = ihost;
 434         for(char* n = ident; *n; n++)
 435                 *t++ = *n;
 436         *t++ = '@';
 437         for(const char* n = this->GetIPString(); *n; n++)
 438                 *t++ = *n;
 439         *t = 0;
 440
 441         this->cached_hostip = strdup(ihost);
 442
 443         return this->cached_hostip;
 444 }
 445
 446 void userrec::CloseSocket()
 447 {
 448         ServerInstance->SE->Shutdown(this, 2);
 449         ServerInstance->SE->Close(this);
 450 }
 451
 452 char* userrec::GetFullHost()
 453 {
 454         if (this->cached_fullhost)
 455                 return this->cached_fullhost;
 456
 457         char result[MAXBUF];
 458         char* t = result;
 459         for(char* n = nick; *n; n++)
 460                 *t++ = *n;
 461         *t++ = '!';
 462         for(char* n = ident; *n; n++)
 463                 *t++ = *n;
 464         *t++ = '@';
 465         for(char* n = dhost; *n; n++)
 466                 *t++ = *n;
 467         *t = 0;
 468
 469         this->cached_fullhost = strdup(result);
 470
 471         return this->cached_fullhost;
 472 }
 473
 474 char* userrec::MakeWildHost()
 475 {
 476         static char nresult[MAXBUF];
 477         char* t = nresult;
 478         *t++ = '*';     *t++ = '!';
 479         *t++ = '*';     *t++ = '@';
 480         for(char* n = dhost; *n; n++)
 481                 *t++ = *n;
 482         *t = 0;
 483         return nresult;
 484 }
 485
 486 int userrec::ReadData(void* buffer, size_t size)
 487 {
 488         if (IS_LOCAL(this))
 489         {
 490 #ifndef WIN32
 491                 return read(this->fd, buffer, size);
 492 #else
 493                 return recv(this->fd, (char*)buffer, size, 0);
 494 #endif
 495         }
 496         else
 497                 return 0;
 498 }
 499
 500
 501 char* userrec::GetFullRealHost()
 502 {
 503         if (this->cached_fullrealhost)
 504                 return this->cached_fullrealhost;
 505
 506         char fresult[MAXBUF];
 507         char* t = fresult;
 508         for(char* n = nick; *n; n++)
 509                 *t++ = *n;
 510         *t++ = '!';
 511         for(char* n = ident; *n; n++)
 512                 *t++ = *n;
 513         *t++ = '@';
 514         for(char* n = host; *n; n++)
 515                 *t++ = *n;
 516         *t = 0;
 517
 518         this->cached_fullrealhost = strdup(fresult);
 519
 520         return this->cached_fullrealhost;
 521 }
 522
 523 bool userrec::IsInvited(const irc::string &channel)
 524 {
 525         for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 526         {
 527                 if (channel == *i)
 528                 {
 529                         return true;
 530                 }
 531         }
 532         return false;
 533 }
 534
 535 InvitedList* userrec::GetInviteList()
 536 {
 537         return &invites;
 538 }
 539
 540 void userrec::InviteTo(const irc::string &channel)
 541 {
 542         invites.push_back(channel);
 543 }
 544
 545 void userrec::RemoveInvite(const irc::string &channel)
 546 {
 547         for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 548         {
 549                 if (channel == *i)
 550                 {
 551                         invites.erase(i);
 552                         return;
 553                 }
 554         }
 555 }
 556
 557 bool userrec::HasPermission(const std::string &command)
 558 {
 559         char* mycmd;
 560         char* savept;
 561         char* savept2;
 562
 563         /*
 564          * users on remote servers can completely bypass all permissions based checks.
 565          * This prevents desyncs when one server has different type/class tags to another.
 566          * That having been said, this does open things up to the possibility of source changes
 567          * allowing remote kills, etc - but if they have access to the src, they most likely have
 568          * access to the conf - so it's an end to a means either way.
 569          */
 570         if (!IS_LOCAL(this))
 571                 return true;
 572
 573         // are they even an oper at all?
 574         if (IS_OPER(this))
 575         {
 576                 opertype_t::iterator iter_opertype = ServerInstance->Config->opertypes.find(this->oper);
 577                 if (iter_opertype != ServerInstance->Config->opertypes.end())
 578                 {
 579                         char* Classes = strdup(iter_opertype->second);
 580                         char* myclass = strtok_r(Classes," ",&savept);
 581                         while (myclass)
 582                         {
 583                                 operclass_t::iterator iter_operclass = ServerInstance->Config->operclass.find(myclass);
 584                                 if (iter_operclass != ServerInstance->Config->operclass.end())
 585                                 {
 586                                         char* CommandList = strdup(iter_operclass->second);
 587                                         mycmd = strtok_r(CommandList," ",&savept2);
 588                                         while (mycmd)
 589                                         {
 590                                                 if ((!strcasecmp(mycmd,command.c_str())) || (*mycmd == '*'))
 591                                                 {
 592                                                         free(Classes);
 593                                                         free(CommandList);
 594                                                         return true;
 595                                                 }
 596                                                 mycmd = strtok_r(NULL," ",&savept2);
 597                                         }
 598                                         free(CommandList);
 599                                 }
 600                                 myclass = strtok_r(NULL," ",&savept);
 601                         }
 602                         free(Classes);
 603                 }
 604         }
 605         return false;
 606 }
 607
 608 /** NOTE: We cannot pass a const reference to this method.
 609  * The string is changed by the workings of the method,
 610  * so that if we pass const ref, we end up copying it to
 611  * something we can change anyway. Makes sense to just let
 612  * the compiler do that copy for us.
 613  */
 614 bool userrec::AddBuffer(std::string a)
 615 {
 616         try
 617         {
 618                 std::string::size_type i = a.rfind('\r');
 619
 620                 while (i != std::string::npos)
 621                 {
 622                         a.erase(i, 1);
 623                         i = a.rfind('\r');
 624                 }
 625
 626                 if (a.length())
 627                         recvq.append(a);
 628
 629                 if (recvq.length() > (unsigned)this->recvqmax)
 630                 {
 631                         this->SetWriteError("RecvQ exceeded");
 632                         ServerInstance->WriteOpers("*** User %s RecvQ of %d exceeds connect class maximum of %d",this->nick,recvq.length(),this->recvqmax);
 633                         return false;
 634                 }
 635
 636                 return true;
 637         }
 638
 639         catch (...)
 640         {
 641                 ServerInstance->Log(DEBUG,"Exception in userrec::AddBuffer()");
 642                 return false;
 643         }
 644 }
 645
 646 bool userrec::BufferIsReady()
 647 {
 648         return (recvq.find('\n') != std::string::npos);
 649 }
 650
 651 void userrec::ClearBuffer()
 652 {
 653         recvq.clear();
 654 }
 655
 656 std::string userrec::GetBuffer()
 657 {
 658         try
 659         {
 660                 if (!recvq.length())
 661                         return "";
 662
 663                 /* Strip any leading \r or \n off the string.
 664                  * Usually there are only one or two of these,
 665                  * so its is computationally cheap to do.
 666                  */
 667                 std::string::iterator t = recvq.begin();
 668                 while (t != recvq.end() && (*t == '\r' || *t == '\n'))
 669                 {
 670                         recvq.erase(t);
 671                         t = recvq.begin();
 672                 }
 673
 674                 for (std::string::iterator x = recvq.begin(); x != recvq.end(); x++)
 675                 {
 676                         /* Find the first complete line, return it as the
 677                          * result, and leave the recvq as whats left
 678                          */
 679                         if (*x == '\n')
 680                         {
 681                                 std::string ret = std::string(recvq.begin(), x);
 682                                 recvq.erase(recvq.begin(), x + 1);
 683                                 return ret;
 684                         }
 685                 }
 686                 return "";
 687         }
 688
 689         catch (...)
 690         {
 691                 ServerInstance->Log(DEBUG,"Exception in userrec::GetBuffer()");
 692                 return "";
 693         }
 694 }
 695
 696 void userrec::AddWriteBuf(const std::string &data)
 697 {
 698         if (*this->GetWriteError())
 699                 return;
 700
 701         if (sendq.length() + data.length() > (unsigned)this->sendqmax)
 702         {
 703                 /*
 704                  * Fix by brain - Set the error text BEFORE calling writeopers, because
 705                  * if we dont it'll recursively  call here over and over again trying
 706                  * to repeatedly add the text to the sendq!
 707                  */
 708                 this->SetWriteError("SendQ exceeded");
 709                 ServerInstance->WriteOpers("*** User %s SendQ of %d exceeds connect class maximum of %d",this->nick,sendq.length() + data.length(),this->sendqmax);
 710                 return;
 711         }
 712
 713         try
 714         {
 715                 if (data.length() > MAXBUF - 2) /* MAXBUF has a value of 514, to account for line terminators */
 716                         sendq.append(data.substr(0,MAXBUF - 4)).append("\r\n"); /* MAXBUF-4 = 510 */
 717                 else
 718                         sendq.append(data);
 719         }
 720         catch (...)
 721         {
 722                 this->SetWriteError("SendQ exceeded");
 723                 ServerInstance->WriteOpers("*** User %s SendQ got an exception",this->nick);
 724         }
 725 }
 726
 727 // send AS MUCH OF THE USERS SENDQ as we are able to (might not be all of it)
 728 void userrec::FlushWriteBuf()
 729 {
 730         try
 731         {
 732                 if ((this->fd == FD_MAGIC_NUMBER) || (*this->GetWriteError()))
 733                 {
 734                         sendq.clear();
 735                 }
 736                 if ((sendq.length()) && (this->fd != FD_MAGIC_NUMBER))
 737                 {
 738                         int old_sendq_length = sendq.length();
 739                         int n_sent = ServerInstance->SE->Send(this, this->sendq.data(), this->sendq.length(), 0);
 740
 741                         if (n_sent == -1)
 742                         {
 743                                 if (errno == EAGAIN)
 744                                 {
 745                                         /* The socket buffer is full. This isnt fatal,
 746                                          * try again later.
 747                                          */
 748                                         this->ServerInstance->SE->WantWrite(this);
 749                                 }
 750                                 else
 751                                 {
 752                                         /* Fatal error, set write error and bail
 753                                          */
 754                                         this->SetWriteError(errno ? strerror(errno) : "EOF from client");
 755                                         return;
 756                                 }
 757                         }
 758                         else
 759                         {
 760                                 /* advance the queue */
 761                                 if (n_sent)
 762                                         this->sendq = this->sendq.substr(n_sent);
 763                                 /* update the user's stats counters */
 764                                 this->bytes_out += n_sent;
 765                                 this->cmds_out++;
 766                                 if (n_sent != old_sendq_length)
 767                                         this->ServerInstance->SE->WantWrite(this);
 768                         }
 769                 }
 770         }
 771
 772         catch (...)
 773         {
 774                 ServerInstance->Log(DEBUG,"Exception in userrec::FlushWriteBuf()");
 775         }
 776
 777         if (this->sendq.empty())
 778         {
 779                 FOREACH_MOD(I_OnBufferFlushed,OnBufferFlushed(this));
 780         }
 781 }
 782
 783 void userrec::SetWriteError(const std::string &error)
 784 {
 785         try
 786         {
 787                 // don't try to set the error twice, its already set take the first string.
 788                 if (this->WriteError.empty())
 789                         this->WriteError = error;
 790         }
 791
 792         catch (...)
 793         {
 794                 ServerInstance->Log(DEBUG,"Exception in userrec::SetWriteError()");
 795         }
 796 }
 797
 798 const char* userrec::GetWriteError()
 799 {
 800         return this->WriteError.c_str();
 801 }
 802
 803 void userrec::Oper(const std::string &opertype)
 804 {
 805         try
 806         {
 807                 this->modes[UM_OPERATOR] = 1;
 808                 this->WriteServ("MODE %s :+o", this->nick);
 809                 FOREACH_MOD(I_OnOper, OnOper(this, opertype));
 810                 ServerInstance->Log(DEFAULT,"OPER: %s!%s@%s opered as type: %s", this->nick, this->ident, this->host, opertype.c_str());
 811                 strlcpy(this->oper, opertype.c_str(), NICKMAX - 1);
 812                 ServerInstance->all_opers.push_back(this);
 813                 FOREACH_MOD(I_OnPostOper,OnPostOper(this, opertype));
 814         }
 815
 816         catch (...)
 817         {
 818                 ServerInstance->Log(DEBUG,"Exception in userrec::Oper()");
 819         }
 820 }
 821
 822 void userrec::UnOper()
 823 {
 824         try
 825         {
 826                 if (IS_OPER(this))
 827                 {
 828                         // unset their oper type (what IS_OPER checks), and remove +o
 829                         *this->oper = 0;
 830                         this->modes[UM_OPERATOR] = 0;
 831
 832                         // remove them from the opers list.
 833                         for (std::vector<userrec*>::iterator a = ServerInstance->all_opers.begin(); a < ServerInstance->all_opers.end(); a++)
 834                         {
 835                                 if (*a == this)
 836                                 {
 837                                         ServerInstance->all_opers.erase(a);
 838                                         return;
 839                                 }
 840                         }
 841                 }
 842         }
 843
 844         catch (...)
 845         {
 846                 ServerInstance->Log(DEBUG,"Exception in userrec::UnOper()");
 847         }
 848 }
 849
 850 void userrec::QuitUser(InspIRCd* Instance, userrec *user, const std::string &quitreason, const char* operreason)
 851 {
 852         user->muted = true;
 853         Instance->GlobalCulls.AddItem(user, quitreason.c_str(), operreason);
 854 }
 855
 856 /* adds or updates an entry in the whowas list */
 857 void userrec::AddToWhoWas()
 858 {
 859         command_t* whowas_command = ServerInstance->Parser->GetHandler("WHOWAS");
 860         if (whowas_command)
 861         {
 862                 std::deque<classbase*> params;
 863                 params.push_back(this);
 864                 whowas_command->HandleInternal(WHOWAS_ADD, params);
 865         }
 866 }
 867
 868 /* add a client connection to the sockets list */
 869 void userrec::AddClient(InspIRCd* Instance, int socket, int port, bool iscached, int socketfamily, sockaddr* ip)
 870 {
 871         /* NOTE: Calling this one parameter constructor for userrec automatically
 872          * allocates a new UUID and places it in the hash_map.
 873          */
 874         userrec* New = new userrec(Instance);
 875         int j = 0;
 876
 877         Instance->unregistered_count++;
 878
 879         char ipaddr[MAXBUF];
 880 #ifdef IPV6
 881         if (socketfamily == AF_INET6)
 882                 inet_ntop(AF_INET6, &((const sockaddr_in6*)ip)->sin6_addr, ipaddr, sizeof(ipaddr));
 883         else
 884 #endif
 885         inet_ntop(AF_INET, &((const sockaddr_in*)ip)->sin_addr, ipaddr, sizeof(ipaddr));
 886
 887         (*(Instance->clientlist))[New->uuid] = New;
 888         New->SetFd(socket);
 889
 890         /* The users default nick is their UUID */
 891         strlcpy(New->nick, New->uuid, NICKMAX - 1);
 892
 893         New->server = Instance->FindServerNamePtr(Instance->Config->ServerName);
 894         /* We don't need range checking here, we KNOW 'unknown\0' will fit into the ident field. */
 895         strcpy(New->ident, "unknown");
 896
 897         New->registered = REG_NONE;
 898         New->signon = Instance->Time() + Instance->Config->dns_timeout;
 899         New->lastping = 1;
 900
 901         New->SetSockAddr(socketfamily, ipaddr, port);
 902
 903         /* Smarter than your average bear^H^H^H^Hset of strlcpys. */
 904         for (const char* temp = New->GetIPString(); *temp && j < 64; temp++, j++)
 905                 New->dhost[j] = New->host[j] = *temp;
 906         New->dhost[j] = New->host[j] = 0;
 907
 908         Instance->AddLocalClone(New);
 909         Instance->AddGlobalClone(New);
 910
 911         /*
 912          * First class check. We do this again in FullConnect after DNS is done, and NICK/USER is recieved.
 913          * See my note down there for why this is required. DO NOT REMOVE. :) -- w00t
 914          */
 915         ConnectClass* i = New->GetClass();
 916
 917         if (!i)
 918         {
 919                 userrec::QuitUser(Instance, New, "Access denied by configuration");
 920                 return;
 921         }
 922
 923         /*
 924          * Check connect class settings and initialise settings into userrec.
 925          * This will be done again after DNS resolution. -- w00t
 926          */
 927         New->CheckClass();
 928
 929         Instance->local_users.push_back(New);
 930
 931         if ((Instance->local_users.size() > Instance->Config->SoftLimit) || (Instance->local_users.size() >= MAXCLIENTS))
 932         {
 933                 Instance->WriteOpers("*** Warning: softlimit value has been reached: %d clients", Instance->Config->SoftLimit);
 934                 userrec::QuitUser(Instance, New,"No more connections allowed");
 935                 return;
 936         }
 937
 938         /*
 939          * XXX -
 940          * this is done as a safety check to keep the file descriptors within range of fd_ref_table.
 941          * its a pretty big but for the moment valid assumption:
 942          * file descriptors are handed out starting at 0, and are recycled as theyre freed.
 943          * therefore if there is ever an fd over 65535, 65536 clients must be connected to the
 944          * irc server at once (or the irc server otherwise initiating this many connections, files etc)
 945          * which for the time being is a physical impossibility (even the largest networks dont have more
 946          * than about 10,000 users on ONE server!)
 947          */
 948 #ifndef WINDOWS
 949         if ((unsigned int)socket >= MAX_DESCRIPTORS)
 950         {
 951                 userrec::QuitUser(Instance, New, "Server is full");
 952                 return;
 953         }
 954 #endif
 955
 956         New->exempt = (Instance->XLines->matches_exception(New) != NULL);
 957         if (!New->exempt)
 958         {
 959                 ZLine* r = Instance->XLines->matches_zline(ipaddr);
 960                 if (r)
 961                 {
 962                         char reason[MAXBUF];
 963                         if (*Instance->Config->MoronBanner)
 964                                 New->WriteServ("NOTICE %s :*** %s", New->nick, Instance->Config->MoronBanner);
 965                         snprintf(reason,MAXBUF,"Z-Lined: %s",r->reason);
 966                         userrec::QuitUser(Instance, New, reason);
 967                         return;
 968                 }
 969         }
 970
 971         if (socket > -1)
 972         {
 973                 if (!Instance->SE->AddFd(New))
 974                 {
 975                         userrec::QuitUser(Instance, New, "Internal error handling connection");
 976                         return;
 977                 }
 978         }
 979
 980         /* NOTE: even if dns lookups are *off*, we still need to display this.
 981          * BOPM and other stuff requires it.
 982          */
 983         New->WriteServ("NOTICE Auth :*** Looking up your hostname...");
 984 }
 985
 986 unsigned long userrec::GlobalCloneCount()
 987 {
 988         clonemap::iterator x = ServerInstance->global_clones.find(this->GetIPString());
 989         if (x != ServerInstance->global_clones.end())
 990                 return x->second;
 991         else
 992                 return 0;
 993 }
 994
 995 unsigned long userrec::LocalCloneCount()
 996 {
 997         clonemap::iterator x = ServerInstance->local_clones.find(this->GetIPString());
 998         if (x != ServerInstance->local_clones.end())
 999                 return x->second;
1000         else
1001                 return 0;
1002 }
1003
1004 /*
1005  * Check class restrictions
1006  */
1007 void userrec::CheckClass(const std::string &explicit_class)
1008 {
1009         ConnectClass* a = this->GetClass(explicit_class);
1010
1011         if ((!a) || (a->GetType() == CC_DENY))
1012         {
1013                 userrec::QuitUser(ServerInstance, this, "Unauthorised connection");
1014                 return;
1015         }
1016         else if ((a->GetMaxLocal()) && (this->LocalCloneCount() > a->GetMaxLocal()))
1017         {
1018                 userrec::QuitUser(ServerInstance, this, "No more connections allowed from your host via this connect class (local)");
1019                 ServerInstance->WriteOpers("*** WARNING: maximum LOCAL connections (%ld) exceeded for IP %s", a->GetMaxLocal(), this->GetIPString());
1020                 return;
1021         }
1022         else if ((a->GetMaxGlobal()) && (this->GlobalCloneCount() > a->GetMaxGlobal()))
1023         {
1024                 userrec::QuitUser(ServerInstance, this, "No more connections allowed from your host via this connect class (global)");
1025                 ServerInstance->WriteOpers("*** WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s", a->GetMaxGlobal(), this->GetIPString());
1026                 return;
1027         }
1028
1029         this->pingmax = a->GetPingTime();
1030         this->nping = ServerInstance->Time() + a->GetPingTime() + ServerInstance->Config->dns_timeout;
1031         this->timeout = ServerInstance->Time() + a->GetRegTimeout();
1032         this->flood = a->GetFlood();
1033         this->threshold = a->GetThreshold();
1034         this->sendqmax = a->GetSendqMax();
1035         this->recvqmax = a->GetRecvqMax();
1036         this->MaxChans = a->GetMaxChans();
1037 }
1038
1039 void userrec::FullConnect()
1040 {
1041         ServerInstance->stats->statsConnects++;
1042         this->idle_lastmsg = ServerInstance->Time();
1043
1044         /*
1045          * You may be thinking "wtf, we checked this in userrec::AddClient!" - and yes, we did, BUT.
1046          * At the time AddClient is called, we don't have a resolved host, by here we probably do - which
1047          * may put the user into a totally seperate class with different restrictions! so we *must* check again.
1048          * Don't remove this! -- w00t
1049          */
1050         this->CheckClass();
1051
1052         /* Check the password, if one is required by the user's connect class.
1053          * This CANNOT be in CheckClass(), because that is called prior to PASS as well!
1054          */
1055         if ((!this->GetClass()->GetPass().empty()) && (!this->haspassed))
1056         {
1057                 userrec::QuitUser(ServerInstance, this, "Invalid password");
1058                 return;
1059         }
1060
1061         if (!this->exempt)
1062         {
1063                 GLine* r = ServerInstance->XLines->matches_gline(this);
1064
1065                 if (r)
1066                 {
1067                         this->muted = true;
1068                         char reason[MAXBUF];
1069                         if (*ServerInstance->Config->MoronBanner)
1070                                 this->WriteServ("NOTICE %s :*** %s", this->nick, ServerInstance->Config->MoronBanner);
1071                         snprintf(reason,MAXBUF,"G-Lined: %s",r->reason);
1072                         userrec::QuitUser(ServerInstance, this, reason);
1073                         return;
1074                 }
1075
1076                 KLine* n = ServerInstance->XLines->matches_kline(this);
1077
1078                 if (n)
1079                 {
1080                         this->muted = true;
1081                         char reason[MAXBUF];
1082                         if (*ServerInstance->Config->MoronBanner)
1083                                 this->WriteServ("NOTICE %s :*** %s", this, ServerInstance->Config->MoronBanner);
1084                         snprintf(reason,MAXBUF,"K-Lined: %s",n->reason);
1085                         userrec::QuitUser(ServerInstance, this, reason);
1086                         return;
1087                 }
1088         }
1089
1090         this->WriteServ("NOTICE Auth :Welcome to \002%s\002!",ServerInstance->Config->Network);
1091         this->WriteServ("001 %s :Welcome to the %s IRC Network %s!%s@%s",this->nick, ServerInstance->Config->Network, this->nick, this->ident, this->host);
1092         this->WriteServ("002 %s :Your host is %s, running version %s",this->nick,ServerInstance->Config->ServerName,VERSION);
1093         this->WriteServ("003 %s :This server was created %s %s", this->nick, __TIME__, __DATE__);
1094         this->WriteServ("004 %s %s %s %s %s %s", this->nick, ServerInstance->Config->ServerName, VERSION, ServerInstance->Modes->UserModeList().c_str(), ServerInstance->Modes->ChannelModeList().c_str(), ServerInstance->Modes->ParaModeList().c_str());
1095
1096         ServerInstance->Config->Send005(this);
1097
1098         this->WriteServ("042 %s %s :your unique ID", this->nick, this->uuid);
1099
1100
1101         this->ShowMOTD();
1102
1103         /* Now registered */
1104         if (ServerInstance->unregistered_count)
1105                 ServerInstance->unregistered_count--;
1106
1107         /* Trigger LUSERS output, give modules a chance too */
1108         int MOD_RESULT = 0;
1109         FOREACH_RESULT(I_OnPreCommand, OnPreCommand("LUSERS", NULL, 0, this, true, "LUSERS"));
1110         if (!MOD_RESULT)
1111                 ServerInstance->CallCommandHandler("LUSERS", NULL, 0, this);
1112
1113         /*
1114          * fix 3 by brain, move registered = 7 below these so that spurious modes and host
1115          * changes dont go out onto the network and produce 'fake direction'.
1116          */
1117         FOREACH_MOD(I_OnUserConnect,OnUserConnect(this));
1118
1119         this->registered = REG_ALL;
1120
1121         FOREACH_MOD(I_OnPostConnect,OnPostConnect(this));
1122
1123         ServerInstance->SNO->WriteToSnoMask('c',"Client connecting on port %d: %s!%s@%s [%s] [%s]", this->GetPort(), this->nick, this->ident, this->host, this->GetIPString(), this->fullname);
1124 }
1125
1126 /** userrec::UpdateNick()
1127  * re-allocates a nick in the user_hash after they change nicknames,
1128  * returns a pointer to the new user as it may have moved
1129  */
1130 userrec* userrec::UpdateNickHash(const char* New)
1131 {
1132         try
1133         {
1134                 //user_hash::iterator newnick;
1135                 user_hash::iterator oldnick = ServerInstance->clientlist->find(this->nick);
1136
1137                 if (!strcasecmp(this->nick,New))
1138                         return oldnick->second;
1139
1140                 if (oldnick == ServerInstance->clientlist->end())
1141                         return NULL; /* doesnt exist */
1142
1143                 userrec* olduser = oldnick->second;
1144                 (*(ServerInstance->clientlist))[New] = olduser;
1145                 ServerInstance->clientlist->erase(oldnick);
1146                 return olduser;
1147         }
1148
1149         catch (...)
1150         {
1151                 ServerInstance->Log(DEBUG,"Exception in userrec::UpdateNickHash()");
1152                 return NULL;
1153         }
1154 }
1155
1156 void userrec::InvalidateCache()
1157 {
1158         /* Invalidate cache */
1159         if (cached_fullhost)
1160                 free(cached_fullhost);
1161         if (cached_hostip)
1162                 free(cached_hostip);
1163         if (cached_makehost)
1164                 free(cached_makehost);
1165         if (cached_fullrealhost)
1166                 free(cached_fullrealhost);
1167         cached_fullhost = cached_hostip = cached_makehost = cached_fullrealhost = NULL;
1168 }
1169
1170 bool userrec::ForceNickChange(const char* newnick)
1171 {
1172         try
1173         {
1174                 int MOD_RESULT = 0;
1175
1176                 this->InvalidateCache();
1177
1178                 FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(this, newnick));
1179
1180                 if (MOD_RESULT)
1181                 {
1182                         ServerInstance->stats->statsCollisions++;
1183                         return false;
1184                 }
1185
1186                 if (ServerInstance->XLines->matches_qline(newnick))
1187                 {
1188                         ServerInstance->stats->statsCollisions++;
1189                         return false;
1190                 }
1191
1192                 if (this->registered == REG_ALL)
1193                 {
1194                         std::deque<classbase*> dummy;
1195                         command_t* nickhandler = ServerInstance->Parser->GetHandler("NICK");
1196                         if (nickhandler)
1197                         {
1198                                 nickhandler->HandleInternal(1, dummy);
1199                                 bool result = (ServerInstance->Parser->CallHandler("NICK", &newnick, 1, this) == CMD_SUCCESS);
1200                                 nickhandler->HandleInternal(0, dummy);
1201                                 return result;
1202                         }
1203                 }
1204                 return false;
1205         }
1206
1207         catch (...)
1208         {
1209                 ServerInstance->Log(DEBUG,"Exception in userrec::ForceNickChange()");
1210                 return false;
1211         }
1212 }
1213
1214 void userrec::SetSockAddr(int protocol_family, const char* ip, int port)
1215 {
1216         switch (protocol_family)
1217         {
1218 #ifdef SUPPORT_IP6LINKS
1219                 case AF_INET6:
1220                 {
1221                         sockaddr_in6* sin = new sockaddr_in6;
1222                         sin->sin6_family = AF_INET6;
1223                         sin->sin6_port = port;
1224                         inet_pton(AF_INET6, ip, &sin->sin6_addr);
1225                         this->ip = (sockaddr*)sin;
1226                 }
1227                 break;
1228 #endif
1229                 case AF_INET:
1230                 {
1231                         sockaddr_in* sin = new sockaddr_in;
1232                         sin->sin_family = AF_INET;
1233                         sin->sin_port = port;
1234                         inet_pton(AF_INET, ip, &sin->sin_addr);
1235                         this->ip = (sockaddr*)sin;
1236                 }
1237                 break;
1238                 default:
1239                         ServerInstance->Log(DEBUG,"Ut oh, I dont know protocol %d to be set on '%s'!", protocol_family, this->nick);
1240                 break;
1241         }
1242 }
1243
1244 int userrec::GetPort()
1245 {
1246         if (this->ip == NULL)
1247                 return 0;
1248
1249         switch (this->GetProtocolFamily())
1250         {
1251 #ifdef SUPPORT_IP6LINKS
1252                 case AF_INET6:
1253                 {
1254                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1255                         return sin->sin6_port;
1256                 }
1257                 break;
1258 #endif
1259                 case AF_INET:
1260                 {
1261                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1262                         return sin->sin_port;
1263                 }
1264                 break;
1265                 default:
1266                 break;
1267         }
1268         return 0;
1269 }
1270
1271 int userrec::GetProtocolFamily()
1272 {
1273         if (this->ip == NULL)
1274                 return 0;
1275
1276         sockaddr_in* sin = (sockaddr_in*)this->ip;
1277         return sin->sin_family;
1278 }
1279
1280 const char* userrec::GetIPString()
1281 {
1282         static char buf[1024];
1283
1284         if (this->ip == NULL)
1285                 return "";
1286
1287         switch (this->GetProtocolFamily())
1288         {
1289 #ifdef SUPPORT_IP6LINKS
1290                 case AF_INET6:
1291                 {
1292                         static char temp[1024];
1293
1294                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1295                         inet_ntop(sin->sin6_family, &sin->sin6_addr, buf, sizeof(buf));
1296                         /* IP addresses starting with a : on irc are a Bad Thing (tm) */
1297                         if (*buf == ':')
1298                         {
1299                                 strlcpy(&temp[1], buf, sizeof(temp) - 1);
1300                                 *temp = '0';
1301                                 return temp;
1302                         }
1303                         return buf;
1304                 }
1305                 break;
1306 #endif
1307                 case AF_INET:
1308                 {
1309                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1310                         inet_ntop(sin->sin_family, &sin->sin_addr, buf, sizeof(buf));
1311                         return buf;
1312                 }
1313                 break;
1314                 default:
1315                 break;
1316         }
1317         return "";
1318 }
1319
1320 const char* userrec::GetIPString(char* buf)
1321 {
1322         if (this->ip == NULL)
1323         {
1324                 *buf = 0;
1325                 return buf;
1326         }
1327
1328         switch (this->GetProtocolFamily())
1329         {
1330 #ifdef SUPPORT_IP6LINKS
1331                 case AF_INET6:
1332                 {
1333                         static char temp[1024];
1334
1335                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1336                         inet_ntop(sin->sin6_family, &sin->sin6_addr, buf, sizeof(buf));
1337                         /* IP addresses starting with a : on irc are a Bad Thing (tm) */
1338                         if (*buf == ':')
1339                         {
1340                                 strlcpy(&temp[1], buf, sizeof(temp) - 1);
1341                                 *temp = '0';
1342                                 strlcpy(buf, temp, sizeof(temp));
1343                         }
1344                         return buf;
1345                 }
1346                 break;
1347 #endif
1348                 case AF_INET:
1349                 {
1350                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1351                         inet_ntop(sin->sin_family, &sin->sin_addr, buf, sizeof(buf));
1352                         return buf;
1353                 }
1354                 break;
1355
1356                 default:
1357                 break;
1358         }
1359         return "";
1360 }
1361
1362 /** NOTE: We cannot pass a const reference to this method.
1363  * The string is changed by the workings of the method,
1364  * so that if we pass const ref, we end up copying it to
1365  * something we can change anyway. Makes sense to just let
1366  * the compiler do that copy for us.
1367  */
1368 void userrec::Write(std::string text)
1369 {
1370         if (!ServerInstance->SE->BoundsCheckFd(this))
1371                 return;
1372
1373         try
1374         {
1375                 /* ServerInstance->Log(DEBUG,"C[%d] <- %s", this->GetFd(), text.c_str());
1376                  * WARNING: The above debug line is VERY loud, do NOT
1377                  * enable it till we have a good way of filtering it
1378                  * out of the logs (e.g. 1.2 would be good).
1379                  */
1380                 text.append("\r\n");
1381         }
1382         catch (...)
1383         {
1384                 ServerInstance->Log(DEBUG,"Exception in userrec::Write() std::string::append");
1385                 return;
1386         }
1387
1388         if (ServerInstance->Config->GetIOHook(this->GetPort()))
1389         {
1390                 try
1391                 {
1392                         /* XXX: The lack of buffering here is NOT a bug, modules implementing this interface have to
1393                          * implement their own buffering mechanisms
1394                          */
1395                         ServerInstance->Config->GetIOHook(this->GetPort())->OnRawSocketWrite(this->fd, text.data(), text.length());
1396                 }
1397                 catch (CoreException& modexcept)
1398                 {
1399                         ServerInstance->Log(DEBUG, "%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
1400                 }
1401         }
1402         else
1403         {
1404                 this->AddWriteBuf(text);
1405         }
1406         ServerInstance->stats->statsSent += text.length();
1407         this->ServerInstance->SE->WantWrite(this);
1408 }
1409
1410 /** Write()
1411  */
1412 void userrec::Write(const char *text, ...)
1413 {
1414         va_list argsPtr;
1415         char textbuffer[MAXBUF];
1416
1417         va_start(argsPtr, text);
1418         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1419         va_end(argsPtr);
1420
1421         this->Write(std::string(textbuffer));
1422 }
1423
1424 void userrec::WriteServ(const std::string& text)
1425 {
1426         char textbuffer[MAXBUF];
1427
1428         snprintf(textbuffer,MAXBUF,":%s %s",ServerInstance->Config->ServerName,text.c_str());
1429         this->Write(std::string(textbuffer));
1430 }
1431
1432 /** WriteServ()
1433  *  Same as Write(), except `text' is prefixed with `:server.name '.
1434  */
1435 void userrec::WriteServ(const char* text, ...)
1436 {
1437         va_list argsPtr;
1438         char textbuffer[MAXBUF];
1439
1440         va_start(argsPtr, text);
1441         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1442         va_end(argsPtr);
1443
1444         this->WriteServ(std::string(textbuffer));
1445 }
1446
1447
1448 void userrec::WriteFrom(userrec *user, const std::string &text)
1449 {
1450         char tb[MAXBUF];
1451
1452         snprintf(tb,MAXBUF,":%s %s",user->GetFullHost(),text.c_str());
1453
1454         this->Write(std::string(tb));
1455 }
1456
1457
1458 /* write text from an originating user to originating user */
1459
1460 void userrec::WriteFrom(userrec *user, const char* text, ...)
1461 {
1462         va_list argsPtr;
1463         char textbuffer[MAXBUF];
1464
1465         va_start(argsPtr, text);
1466         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1467         va_end(argsPtr);
1468
1469         this->WriteFrom(user, std::string(textbuffer));
1470 }
1471
1472
1473 /* write text to an destination user from a source user (e.g. user privmsg) */
1474
1475 void userrec::WriteTo(userrec *dest, const char *data, ...)
1476 {
1477         char textbuffer[MAXBUF];
1478         va_list argsPtr;
1479
1480         va_start(argsPtr, data);
1481         vsnprintf(textbuffer, MAXBUF, data, argsPtr);
1482         va_end(argsPtr);
1483
1484         this->WriteTo(dest, std::string(textbuffer));
1485 }
1486
1487 void userrec::WriteTo(userrec *dest, const std::string &data)
1488 {
1489         dest->WriteFrom(this, data);
1490 }
1491
1492
1493 void userrec::WriteCommon(const char* text, ...)
1494 {
1495         char textbuffer[MAXBUF];
1496         va_list argsPtr;
1497
1498         if (this->registered != REG_ALL)
1499                 return;
1500
1501         va_start(argsPtr, text);
1502         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1503         va_end(argsPtr);
1504
1505         this->WriteCommon(std::string(textbuffer));
1506 }
1507
1508 void userrec::WriteCommon(const std::string &text)
1509 {
1510         try
1511         {
1512                 bool sent_to_at_least_one = false;
1513                 char tb[MAXBUF];
1514
1515                 if (this->registered != REG_ALL)
1516                         return;
1517
1518                 uniq_id++;
1519
1520                 /* We dont want to be doing this n times, just once */
1521                 snprintf(tb,MAXBUF,":%s %s",this->GetFullHost(),text.c_str());
1522                 std::string out = tb;
1523
1524                 for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1525                 {
1526                         CUList* ulist = v->first->GetUsers();
1527                         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1528                         {
1529                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1530                                 {
1531                                         already_sent[i->first->fd] = uniq_id;
1532                                         i->first->Write(out);
1533                                         sent_to_at_least_one = true;
1534                                 }
1535                         }
1536                 }
1537
1538                 /*
1539                  * if the user was not in any channels, no users will receive the text. Make sure the user
1540                  * receives their OWN message for WriteCommon
1541                  */
1542                 if (!sent_to_at_least_one)
1543                 {
1544                         this->Write(std::string(tb));
1545                 }
1546         }
1547
1548         catch (...)
1549         {
1550                 ServerInstance->Log(DEBUG,"Exception in userrec::WriteCommon()");
1551         }
1552 }
1553
1554
1555 /* write a formatted string to all users who share at least one common
1556  * channel, NOT including the source user e.g. for use in QUIT
1557  */
1558
1559 void userrec::WriteCommonExcept(const char* text, ...)
1560 {
1561         char textbuffer[MAXBUF];
1562         va_list argsPtr;
1563
1564         va_start(argsPtr, text);
1565         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1566         va_end(argsPtr);
1567
1568         this->WriteCommonExcept(std::string(textbuffer));
1569 }
1570
1571 void userrec::WriteCommonQuit(const std::string &normal_text, const std::string &oper_text)
1572 {
1573         char tb1[MAXBUF];
1574         char tb2[MAXBUF];
1575
1576         if (this->registered != REG_ALL)
1577                 return;
1578
1579         uniq_id++;
1580         snprintf(tb1,MAXBUF,":%s QUIT :%s",this->GetFullHost(),normal_text.c_str());
1581         snprintf(tb2,MAXBUF,":%s QUIT :%s",this->GetFullHost(),oper_text.c_str());
1582         std::string out1 = tb1;
1583         std::string out2 = tb2;
1584
1585         for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1586         {
1587                 CUList *ulist = v->first->GetUsers();
1588                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1589                 {
1590                         if (this != i->first)
1591                         {
1592                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1593                                 {
1594                                         already_sent[i->first->fd] = uniq_id;
1595                                         i->first->Write(IS_OPER(i->first) ? out2 : out1);
1596                                 }
1597                         }
1598                 }
1599         }
1600 }
1601
1602 void userrec::WriteCommonExcept(const std::string &text)
1603 {
1604         char tb1[MAXBUF];
1605         std::string out1;
1606
1607         if (this->registered != REG_ALL)
1608                 return;
1609
1610         uniq_id++;
1611         snprintf(tb1,MAXBUF,":%s %s",this->GetFullHost(),text.c_str());
1612         out1 = tb1;
1613
1614         for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1615         {
1616                 CUList *ulist = v->first->GetUsers();
1617                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1618                 {
1619                         if (this != i->first)
1620                         {
1621                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1622                                 {
1623                                         already_sent[i->first->fd] = uniq_id;
1624                                         i->first->Write(out1);
1625                                 }
1626                         }
1627                 }
1628         }
1629
1630 }
1631
1632 void userrec::WriteWallOps(const std::string &text)
1633 {
1634         if (!IS_OPER(this) && IS_LOCAL(this))
1635                 return;
1636
1637         std::string wallop("WALLOPS :");
1638         wallop.append(text);
1639
1640         for (std::vector<userrec*>::const_iterator i = ServerInstance->local_users.begin(); i != ServerInstance->local_users.end(); i++)
1641         {
1642                 userrec* t = *i;
1643                 if (t->IsModeSet('w'))
1644                         this->WriteTo(t,wallop);
1645         }
1646 }
1647
1648 void userrec::WriteWallOps(const char* text, ...)
1649 {
1650         char textbuffer[MAXBUF];
1651         va_list argsPtr;
1652
1653         va_start(argsPtr, text);
1654         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1655         va_end(argsPtr);
1656
1657         this->WriteWallOps(std::string(textbuffer));
1658 }
1659
1660 /* return 0 or 1 depending if users u and u2 share one or more common channels
1661  * (used by QUIT, NICK etc which arent channel specific notices)
1662  *
1663  * The old algorithm in 1.0 for this was relatively inefficient, iterating over
1664  * the first users channels then the second users channels within the outer loop,
1665  * therefore it was a maximum of x*y iterations (upon returning 0 and checking
1666  * all possible iterations). However this new function instead checks against the
1667  * channel's userlist in the inner loop which is a std::map<userrec*,userrec*>
1668  * and saves us time as we already know what pointer value we are after.
1669  * Don't quote me on the maths as i am not a mathematician or computer scientist,
1670  * but i believe this algorithm is now x+(log y) maximum iterations instead.
1671  */
1672 bool userrec::SharesChannelWith(userrec *other)
1673 {
1674         if ((!other) || (this->registered != REG_ALL) || (other->registered != REG_ALL))
1675                 return false;
1676
1677         /* Outer loop */
1678         for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1679         {
1680                 /* Eliminate the inner loop (which used to be ~equal in size to the outer loop)
1681                  * by replacing it with a map::find which *should* be more efficient
1682                  */
1683                 if (i->first->HasUser(other))
1684                         return true;
1685         }
1686         return false;
1687 }
1688
1689 bool userrec::ChangeName(const char* gecos)
1690 {
1691         if (!strcmp(gecos, this->fullname))
1692                 return true;
1693
1694         if (IS_LOCAL(this))
1695         {
1696                 int MOD_RESULT = 0;
1697                 FOREACH_RESULT(I_OnChangeLocalUserGECOS,OnChangeLocalUserGECOS(this,gecos));
1698                 if (MOD_RESULT)
1699                         return false;
1700                 FOREACH_MOD(I_OnChangeName,OnChangeName(this,gecos));
1701         }
1702         strlcpy(this->fullname,gecos,MAXGECOS+1);
1703
1704         return true;
1705 }
1706
1707 bool userrec::ChangeDisplayedHost(const char* host)
1708 {
1709         if (!strcmp(host, this->dhost))
1710                 return true;
1711
1712         if (IS_LOCAL(this))
1713         {
1714                 int MOD_RESULT = 0;
1715                 FOREACH_RESULT(I_OnChangeLocalUserHost,OnChangeLocalUserHost(this,host));
1716                 if (MOD_RESULT)
1717                         return false;
1718                 FOREACH_MOD(I_OnChangeHost,OnChangeHost(this,host));
1719         }
1720         if (this->ServerInstance->Config->CycleHosts)
1721                 this->WriteCommonExcept("QUIT :Changing hosts");
1722
1723         /* Fix by Om: userrec::dhost is 65 long, this was truncating some long hosts */
1724         strlcpy(this->dhost,host,64);
1725
1726         this->InvalidateCache();
1727
1728         if (this->ServerInstance->Config->CycleHosts)
1729         {
1730                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1731                 {
1732                         i->first->WriteAllExceptSender(this, false, 0, "JOIN %s", i->first->name);
1733                         std::string n = this->ServerInstance->Modes->ModeString(this, i->first);
1734                         if (n.length() > 0)
1735                                 i->first->WriteAllExceptSender(this, true, 0, "MODE %s +%s", i->first->name, n.c_str());
1736                 }
1737         }
1738
1739         if (IS_LOCAL(this))
1740                 this->WriteServ("396 %s %s :is now your displayed host",this->nick,this->dhost);
1741
1742         return true;
1743 }
1744
1745 bool userrec::ChangeIdent(const char* newident)
1746 {
1747         if (!strcmp(newident, this->ident))
1748                 return true;
1749
1750         if (this->ServerInstance->Config->CycleHosts)
1751                 this->WriteCommonExcept("%s","QUIT :Changing ident");
1752
1753         strlcpy(this->ident, newident, IDENTMAX+2);
1754
1755         this->InvalidateCache();
1756
1757         if (this->ServerInstance->Config->CycleHosts)
1758         {
1759                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1760                 {
1761                         i->first->WriteAllExceptSender(this, false, 0, "JOIN %s", i->first->name);
1762                         std::string n = this->ServerInstance->Modes->ModeString(this, i->first);
1763                         if (n.length() > 0)
1764                                 i->first->WriteAllExceptSender(this, true, 0, "MODE %s +%s", i->first->name, n.c_str());
1765                 }
1766         }
1767
1768         return true;
1769 }
1770
1771 void userrec::SendAll(const char* command, char* text, ...)
1772 {
1773         char textbuffer[MAXBUF];
1774         char formatbuffer[MAXBUF];
1775         va_list argsPtr;
1776
1777         va_start(argsPtr, text);
1778         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1779         va_end(argsPtr);
1780
1781         snprintf(formatbuffer,MAXBUF,":%s %s $* :%s", this->GetFullHost(), command, textbuffer);
1782         std::string fmt = formatbuffer;
1783
1784         for (std::vector<userrec*>::const_iterator i = ServerInstance->local_users.begin(); i != ServerInstance->local_users.end(); i++)
1785         {
1786                 (*i)->Write(fmt);
1787         }
1788 }
1789
1790
1791 std::string userrec::ChannelList(userrec* source)
1792 {
1793         try
1794         {
1795                 std::string list;
1796                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1797                 {
1798                         /* If the target is the same as the sender, let them see all their channels.
1799                          * If the channel is NOT private/secret OR the user shares a common channel
1800                          * If the user is an oper, and the <options:operspywhois> option is set.
1801                          */
1802                         if ((source == this) || (IS_OPER(source) && ServerInstance->Config->OperSpyWhois) || (((!i->first->IsModeSet('p')) && (!i->first->IsModeSet('s'))) || (i->first->HasUser(source))))
1803                         {
1804                                 list.append(i->first->GetPrefixChar(this)).append(i->first->name).append(" ");
1805                         }
1806                 }
1807                 return list;
1808         }
1809         catch (...)
1810         {
1811                 ServerInstance->Log(DEBUG,"Exception in userrec::ChannelList()");
1812                 return "";
1813         }
1814 }
1815
1816 void userrec::SplitChanList(userrec* dest, const std::string &cl)
1817 {
1818         std::string line;
1819         std::ostringstream prefix;
1820         std::string::size_type start, pos, length;
1821
1822         try
1823         {
1824                 prefix << this->nick << " " << dest->nick << " :";
1825                 line = prefix.str();
1826                 int namelen = strlen(ServerInstance->Config->ServerName) + 6;
1827
1828                 for (start = 0; (pos = cl.find(' ', start)) != std::string::npos; start = pos+1)
1829                 {
1830                         length = (pos == std::string::npos) ? cl.length() : pos;
1831
1832                         if (line.length() + namelen + length - start > 510)
1833                         {
1834                                 ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1835                                 line = prefix.str();
1836                         }
1837
1838                         if(pos == std::string::npos)
1839                         {
1840                                 line.append(cl.substr(start, length - start));
1841                                 break;
1842                         }
1843                         else
1844                         {
1845                                 line.append(cl.substr(start, length - start + 1));
1846                         }
1847                 }
1848
1849                 if (line.length())
1850                 {
1851                         ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1852                 }
1853         }
1854
1855         catch (...)
1856         {
1857                 ServerInstance->Log(DEBUG,"Exception in userrec::SplitChanList()");
1858         }
1859 }
1860
1861 unsigned int userrec::GetMaxChans()
1862 {
1863         return this->MaxChans;
1864 }
1865
1866 /* looks up a users password for their connection class (<ALLOW>/<DENY> tags)
1867  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1868  * then their ip will be taken as 'priority' anyway, so for example,
1869  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1870  */
1871 ConnectClass* userrec::GetClass(const std::string &explicit_name)
1872 {
1873         if (!explicit_name.empty())
1874         {
1875                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1876                 {
1877                         if (explicit_name == i->GetName())
1878                                 return &(*i);
1879                 }
1880         }
1881         else
1882         {
1883                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1884                 {
1885                         if (((match(this->GetIPString(),i->GetHost().c_str(),true)) || (match(this->host,i->GetHost().c_str()))))
1886                         {
1887                                 if (i->GetPort())
1888                                 {
1889                                         if (this->GetPort() == i->GetPort())
1890                                                 return &(*i);
1891                                         else
1892                                                 continue;
1893                                 }
1894                                 else
1895                                         return &(*i);
1896                         }
1897                 }
1898         }
1899         return NULL;
1900 }
1901
1902 void userrec::PurgeEmptyChannels()
1903 {
1904         std::vector<chanrec*> to_delete;
1905
1906         // firstly decrement the count on each channel
1907         for (UCListIter f = this->chans.begin(); f != this->chans.end(); f++)
1908         {
1909                 f->first->RemoveAllPrefixes(this);
1910                 if (f->first->DelUser(this) == 0)
1911                 {
1912                         /* No users left in here, mark it for deletion */
1913                         try
1914                         {
1915                                 to_delete.push_back(f->first);
1916                         }
1917                         catch (...)
1918                         {
1919                                 ServerInstance->Log(DEBUG,"Exception in userrec::PurgeEmptyChannels to_delete.push_back()");
1920                         }
1921                 }
1922         }
1923
1924         for (std::vector<chanrec*>::iterator n = to_delete.begin(); n != to_delete.end(); n++)
1925         {
1926                 chanrec* thischan = *n;
1927                 chan_hash::iterator i2 = ServerInstance->chanlist->find(thischan->name);
1928                 if (i2 != ServerInstance->chanlist->end())
1929                 {
1930                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(i2->second));
1931                         DELETE(i2->second);
1932                         ServerInstance->chanlist->erase(i2);
1933                         this->chans.erase(*n);
1934                 }
1935         }
1936
1937         this->UnOper();
1938 }
1939
1940 void userrec::ShowMOTD()
1941 {
1942         if (!ServerInstance->Config->MOTD.size())
1943         {
1944                 this->WriteServ("422 %s :Message of the day file is missing.",this->nick);
1945                 return;
1946         }
1947         this->WriteServ("375 %s :%s message of the day", this->nick, ServerInstance->Config->ServerName);
1948
1949         for (file_cache::iterator i = ServerInstance->Config->MOTD.begin(); i != ServerInstance->Config->MOTD.end(); i++)
1950                 this->WriteServ("372 %s :- %s",this->nick,i->c_str());
1951
1952         this->WriteServ("376 %s :End of message of the day.", this->nick);
1953 }
1954
1955 void userrec::ShowRULES()
1956 {
1957         if (!ServerInstance->Config->RULES.size())
1958         {
1959                 this->WriteServ("434 %s :RULES File is missing",this->nick);
1960                 return;
1961         }
1962
1963         this->WriteServ("308 %s :- %s Server Rules -",this->nick,ServerInstance->Config->ServerName);
1964
1965         for (file_cache::iterator i = ServerInstance->Config->RULES.begin(); i != ServerInstance->Config->RULES.end(); i++)
1966                 this->WriteServ("232 %s :- %s",this->nick,i->c_str());
1967
1968         this->WriteServ("309 %s :End of RULES command.",this->nick);
1969 }
1970
1971 void userrec::HandleEvent(EventType et, int errornum)
1972 {
1973         /* WARNING: May delete this user! */
1974         int thisfd = this->GetFd();
1975
1976         try
1977         {
1978                 switch (et)
1979                 {
1980                         case EVENT_READ:
1981                                 ServerInstance->ProcessUser(this);
1982                         break;
1983                         case EVENT_WRITE:
1984                                 this->FlushWriteBuf();
1985                         break;
1986                         case EVENT_ERROR:
1987                                 /** This should be safe, but dont DARE do anything after it -- Brain */
1988                                 this->SetWriteError(errornum ? strerror(errornum) : "EOF from client");
1989                         break;
1990                 }
1991         }
1992         catch (...)
1993         {
1994                 ServerInstance->Log(DEBUG,"Exception in userrec::HandleEvent intercepted");
1995         }
1996
1997         /* If the user has raised an error whilst being processed, quit them now we're safe to */
1998         if ((ServerInstance->SE->GetRef(thisfd) == this))
1999         {
2000                 if (!WriteError.empty())
2001                 {
2002                         userrec::QuitUser(ServerInstance, this, GetWriteError());
2003                 }
2004         }
2005 }
2006
2007 void userrec::SetOperQuit(const std::string &oquit)
2008 {
2009         if (operquit)
2010                 return;
2011
2012         operquit = strdup(oquit.c_str());
2013 }
2014
2015 const char* userrec::GetOperQuit()
2016 {
2017         return operquit ? operquit : "";
2018 }
2019
2020 VisData::VisData()
2021 {
2022 }
2023
2024 VisData::~VisData()
2025 {
2026 }
2027
2028 bool VisData::VisibleTo(userrec* user)
2029 {
2030         return true;
2031 }
2032