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 <stdarg.h>
  16 #include "socketengine.h"
  17 #include "wildcard.h"
  18 #include "xline.h"
  19 #include "commands/cmd_whowas.h"
  20
  21 static unsigned long already_sent[MAX_DESCRIPTORS] = {0};
  22
  23 /* XXX: Used for speeding up WriteCommon operations */
  24 unsigned long uniq_id = 0;
  25
  26 bool InitTypes(ServerConfig* conf, const char* tag)
  27 {
  28         if (conf->opertypes.size())
  29         {
  30                 for (opertype_t::iterator n = conf->opertypes.begin(); n != conf->opertypes.end(); n++)
  31                 {
  32                         if (n->second)
  33                                 delete[] n->second;
  34                 }
  35         }
  36
  37         conf->opertypes.clear();
  38         return true;
  39 }
  40
  41 bool InitClasses(ServerConfig* conf, const char* tag)
  42 {
  43         if (conf->operclass.size())
  44         {
  45                 for (operclass_t::iterator n = conf->operclass.begin(); n != conf->operclass.end(); n++)
  46                 {
  47                         if (n->second)
  48                                 delete[] n->second;
  49                 }
  50         }
  51
  52         conf->operclass.clear();
  53         return true;
  54 }
  55
  56 bool DoType(ServerConfig* conf, const char* tag, char** entries, ValueList &values, int* types)
  57 {
  58         const char* TypeName = values[0].GetString();
  59         const char* Classes = values[1].GetString();
  60
  61         conf->opertypes[TypeName] = strnewdup(Classes);
  62         return true;
  63 }
  64
  65 bool DoClass(ServerConfig* conf, const char* tag, char** entries, ValueList &values, int* types)
  66 {
  67         const char* ClassName = values[0].GetString();
  68         const char* CommandList = values[1].GetString();
  69
  70         conf->operclass[ClassName] = strnewdup(CommandList);
  71         return true;
  72 }
  73
  74 bool DoneClassesAndTypes(ServerConfig* conf, const char* tag)
  75 {
  76         return true;
  77 }
  78
  79 std::string userrec::ProcessNoticeMasks(const char *sm)
  80 {
  81         bool adding = true, oldadding = false;
  82         const char *c = sm;
  83         std::string output;
  84
  85         while (c && *c)
  86         {
  87                 switch (*c)
  88                 {
  89                         case '+':
  90                                 adding = true;
  91                         break;
  92                         case '-':
  93                                 adding = false;
  94                         break;
  95                         case '*':
  96                                 for (unsigned char d = 'A'; d <= 'z'; d++)
  97                                 {
  98                                         if (ServerInstance->SNO->IsEnabled(d))
  99                                         {
 100                                                 if ((!IsNoticeMaskSet(d) && adding) || (IsNoticeMaskSet(d) && !adding))
 101                                                 {
 102                                                         if ((oldadding != adding) || (!output.length()))
 103                                                                 output += (adding ? '+' : '-');
 104
 105                                                         this->SetNoticeMask(d, adding);
 106
 107                                                         output += d;
 108                                                 }
 109                                         }
 110                                         oldadding = adding;
 111                                 }
 112                         break;
 113                         default:
 114                                 if ((*c >= 'A') && (*c <= 'z') && (ServerInstance->SNO->IsEnabled(*c)))
 115                                 {
 116                                         if ((!IsNoticeMaskSet(*c) && adding) || (IsNoticeMaskSet(*c) && !adding))
 117                                         {
 118                                                 if ((oldadding != adding) || (!output.length()))
 119                                                         output += (adding ? '+' : '-');
 120
 121                                                 this->SetNoticeMask(*c, adding);
 122
 123                                                 output += *c;
 124                                         }
 125                                 }
 126                                 oldadding = adding;
 127                         break;
 128                 }
 129
 130                 *c++;
 131         }
 132
 133         return output;
 134 }
 135
 136 void userrec::StartDNSLookup()
 137 {
 138         try
 139         {
 140                 bool cached;
 141                 const char* ip = this->GetIPString();
 142
 143                 /* Special case for 4in6 (Have i mentioned i HATE 4in6?) */
 144                 if (!strncmp(ip, "0::ffff:", 8))
 145                         res_reverse = new UserResolver(this->ServerInstance, this, ip + 8, DNS_QUERY_PTR4, cached);
 146                 else
 147                         res_reverse = new UserResolver(this->ServerInstance, this, ip, this->GetProtocolFamily() == AF_INET ? DNS_QUERY_PTR4 : DNS_QUERY_PTR6, cached);
 148
 149                 this->ServerInstance->AddResolver(res_reverse, cached);
 150         }
 151         catch (CoreException& e)
 152         {
 153                 ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
 154         }
 155 }
 156
 157 UserResolver::UserResolver(InspIRCd* Instance, userrec* user, std::string to_resolve, QueryType qt, bool &cache) :
 158         Resolver(Instance, to_resolve, qt, cache), bound_user(user)
 159 {
 160         this->fwd = (qt == DNS_QUERY_A || qt == DNS_QUERY_AAAA);
 161         this->bound_fd = user->GetFd();
 162 }
 163
 164 void UserResolver::OnLookupComplete(const std::string &result, unsigned int ttl, bool cached, int resultnum)
 165 {
 166         /* We are only interested in the first matching result */
 167         if (resultnum)
 168                 return;
 169
 170         if ((!this->fwd) && (ServerInstance->SE->GetRef(this->bound_fd) == this->bound_user))
 171         {
 172                 this->bound_user->stored_host = result;
 173                 try
 174                 {
 175                         /* Check we didnt time out */
 176                         if (this->bound_user->registered != REG_ALL)
 177                         {
 178                                 bool cached;
 179 #ifdef IPV6
 180                                 if (this->bound_user->GetProtocolFamily() == AF_INET6)
 181                                 {
 182                                         /* IPV6 forward lookup (with possibility of 4in6) */
 183                                         const char* ip = this->bound_user->GetIPString();
 184                                         bound_user->res_forward = new UserResolver(this->ServerInstance, this->bound_user, result, (!strncmp(ip, "0::ffff:", 8) ? DNS_QUERY_A : DNS_QUERY_AAAA), cached);
 185                                 }
 186                                 else
 187                                         /* IPV4 lookup (mixed protocol mode) */
 188 #endif
 189                                 /* IPV4 lookup (ipv4 only mode) */
 190                                 bound_user->res_forward = new UserResolver(this->ServerInstance, this->bound_user, result, DNS_QUERY_A, cached);
 191                                 this->ServerInstance->AddResolver(bound_user->res_forward, cached);
 192                         }
 193                 }
 194                 catch (CoreException& e)
 195                 {
 196                         ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
 197                 }
 198         }
 199         else if ((this->fwd) && (ServerInstance->SE->GetRef(this->bound_fd) == this->bound_user))
 200         {
 201                 /* Both lookups completed */
 202                 std::string result2("0::ffff:");
 203                 result2.append(result);
 204                 if (this->bound_user->GetIPString() == result || this->bound_user->GetIPString() == result2)
 205                 {
 206                         std::string hostname = this->bound_user->stored_host;
 207                         if (hostname.length() < 65)
 208                         {
 209                                 /* Check we didnt time out */
 210                                 if ((this->bound_user->registered != REG_ALL) && (!this->bound_user->dns_done))
 211                                 {
 212                                         /* Hostnames starting with : are not a good thing (tm) */
 213                                         if (*(hostname.c_str()) == ':')
 214                                                 hostname.insert(0, "0");
 215
 216                                         this->bound_user->WriteServ("NOTICE Auth :*** Found your hostname (%s)%s", hostname.c_str(), (cached ? " -- cached" : ""));
 217                                         this->bound_user->dns_done = true;
 218                                         strlcpy(this->bound_user->dhost, hostname.c_str(),64);
 219                                         strlcpy(this->bound_user->host, hostname.c_str(),64);
 220                                         /* Invalidate cache */
 221                                         this->bound_user->InvalidateCache();
 222                                 }
 223                         }
 224                         else
 225                         {
 226                                 if (!this->bound_user->dns_done)
 227                                 {
 228                                         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());
 229                                         this->bound_user->dns_done = true;
 230                                 }
 231                         }
 232                 }
 233                 else
 234                 {
 235                         if (!this->bound_user->dns_done)
 236                         {
 237                                 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());
 238                                 this->bound_user->dns_done = true;
 239                         }
 240                 }
 241         }
 242 }
 243
 244 void UserResolver::OnError(ResolverError e, const std::string &errormessage)
 245 {
 246         if (ServerInstance->SE->GetRef(this->bound_fd) == this->bound_user)
 247         {
 248                 /* Since dns timeout is implemented outside of the resolver, this was a race condition that could result in this message being sent *after*
 249                  * the user was fully connected. This check fixes that issue  - Special */
 250                 if (!this->bound_user->dns_done)
 251                 {
 252                         /* Error message here */
 253                         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());
 254                         this->bound_user->dns_done = true;
 255                 }
 256         }
 257 }
 258
 259
 260 bool userrec::IsNoticeMaskSet(unsigned char sm)
 261 {
 262         return (snomasks[sm-65]);
 263 }
 264
 265 void userrec::SetNoticeMask(unsigned char sm, bool value)
 266 {
 267         snomasks[sm-65] = value;
 268 }
 269
 270 const char* userrec::FormatNoticeMasks()
 271 {
 272         static char data[MAXBUF];
 273         int offset = 0;
 274
 275         for (int n = 0; n < 64; n++)
 276         {
 277                 if (snomasks[n])
 278                         data[offset++] = n+65;
 279         }
 280
 281         data[offset] = 0;
 282         return data;
 283 }
 284
 285
 286
 287 bool userrec::IsModeSet(unsigned char m)
 288 {
 289         return (modes[m-65]);
 290 }
 291
 292 void userrec::SetMode(unsigned char m, bool value)
 293 {
 294         modes[m-65] = value;
 295 }
 296
 297 const char* userrec::FormatModes()
 298 {
 299         static char data[MAXBUF];
 300         int offset = 0;
 301         for (int n = 0; n < 64; n++)
 302         {
 303                 if (modes[n])
 304                         data[offset++] = n+65;
 305         }
 306         data[offset] = 0;
 307         return data;
 308 }
 309
 310 void userrec::DecrementModes()
 311 {
 312         ServerInstance->Log(DEBUG,"DecrementModes()");
 313         for (unsigned char n = 'A'; n <= 'z'; n++)
 314         {
 315                 if (modes[n-65])
 316                 {
 317                         ServerInstance->Log(DEBUG,"DecrementModes() found mode %c", n);
 318                         ModeHandler* mh = ServerInstance->Modes->FindMode(n, MODETYPE_USER);
 319                         if (mh)
 320                         {
 321                                 ServerInstance->Log(DEBUG,"Found handler %c and call ChangeCount", n);
 322                                 mh->ChangeCount(-1);
 323                         }
 324                 }
 325         }
 326 }
 327
 328 userrec::userrec(InspIRCd* Instance, const std::string &uid) : ServerInstance(Instance)
 329 {
 330         *password = *nick = *ident = *host = *dhost = *fullname = *awaymsg = *oper = *uuid = 0;
 331         server = (char*)Instance->FindServerNamePtr(Instance->Config->ServerName);
 332         reset_due = ServerInstance->Time();
 333         age = ServerInstance->Time(true);
 334         lines_in = lastping = signon = idle_lastmsg = nping = registered = 0;
 335         ChannelCount = timeout = flood = bytes_in = bytes_out = cmds_in = cmds_out = 0;
 336         muted = exempt = haspassed = dns_done = false;
 337         fd = -1;
 338         recvq.clear();
 339         sendq.clear();
 340         WriteError.clear();
 341         res_forward = res_reverse = NULL;
 342         Visibility = NULL;
 343         ip = NULL;
 344         chans.clear();
 345         invites.clear();
 346         memset(modes,0,sizeof(modes));
 347         memset(snomasks,0,sizeof(snomasks));
 348         /* Invalidate cache */
 349         operquit = cached_fullhost = cached_hostip = cached_makehost = cached_fullrealhost = NULL;
 350
 351         if (uid.empty())
 352                 strlcpy(uuid, Instance->GetUID().c_str(), UUID_LENGTH);
 353         else
 354                 strlcpy(uuid, uid.c_str(), UUID_LENGTH);
 355
 356         ServerInstance->Log(DEBUG,"New UUID for user: %s (%s)", uuid, uid.empty() ? "allocated new" : "used remote");
 357
 358         user_hash::iterator finduuid = Instance->uuidlist->find(uuid);
 359         if (finduuid == Instance->uuidlist->end())
 360                 (*Instance->uuidlist)[uuid] = this;
 361         else
 362                 throw CoreException("Duplicate UUID "+std::string(uuid)+" in userrec constructor");
 363 }
 364
 365 void userrec::RemoveCloneCounts()
 366 {
 367         clonemap::iterator x = ServerInstance->local_clones.find(this->GetIPString());
 368         if (x != ServerInstance->local_clones.end())
 369         {
 370                 x->second--;
 371                 if (!x->second)
 372                 {
 373                         ServerInstance->local_clones.erase(x);
 374                 }
 375         }
 376
 377         clonemap::iterator y = ServerInstance->global_clones.find(this->GetIPString());
 378         if (y != ServerInstance->global_clones.end())
 379         {
 380                 y->second--;
 381                 if (!y->second)
 382                 {
 383                         ServerInstance->global_clones.erase(y);
 384                 }
 385         }
 386 }
 387
 388 userrec::~userrec()
 389 {
 390         this->InvalidateCache();
 391         this->DecrementModes();
 392         if (operquit)
 393                 free(operquit);
 394         if (ip)
 395         {
 396                 this->RemoveCloneCounts();
 397
 398                 if (this->GetProtocolFamily() == AF_INET)
 399                 {
 400                         delete (sockaddr_in*)ip;
 401                 }
 402 #ifdef SUPPORT_IP6LINKS
 403                 else
 404                 {
 405                         delete (sockaddr_in6*)ip;
 406                 }
 407 #endif
 408         }
 409
 410         ServerInstance->uuidlist->erase(uuid);
 411 }
 412
 413 char* userrec::MakeHost()
 414 {
 415         if (this->cached_makehost)
 416                 return this->cached_makehost;
 417
 418         char nhost[MAXBUF];
 419         /* This is much faster than snprintf */
 420         char* t = nhost;
 421         for(char* n = ident; *n; n++)
 422                 *t++ = *n;
 423         *t++ = '@';
 424         for(char* n = host; *n; n++)
 425                 *t++ = *n;
 426         *t = 0;
 427
 428         this->cached_makehost = strdup(nhost);
 429
 430         return this->cached_makehost;
 431 }
 432
 433 char* userrec::MakeHostIP()
 434 {
 435         if (this->cached_hostip)
 436                 return this->cached_hostip;
 437
 438         char ihost[MAXBUF];
 439         /* This is much faster than snprintf */
 440         char* t = ihost;
 441         for(char* n = ident; *n; n++)
 442                 *t++ = *n;
 443         *t++ = '@';
 444         for(const char* n = this->GetIPString(); *n; n++)
 445                 *t++ = *n;
 446         *t = 0;
 447
 448         this->cached_hostip = strdup(ihost);
 449
 450         return this->cached_hostip;
 451 }
 452
 453 void userrec::CloseSocket()
 454 {
 455         ServerInstance->SE->Shutdown(this, 2);
 456         ServerInstance->SE->Close(this);
 457 }
 458
 459 char* userrec::GetFullHost()
 460 {
 461         if (this->cached_fullhost)
 462                 return this->cached_fullhost;
 463
 464         char result[MAXBUF];
 465         char* t = result;
 466         for(char* n = nick; *n; n++)
 467                 *t++ = *n;
 468         *t++ = '!';
 469         for(char* n = ident; *n; n++)
 470                 *t++ = *n;
 471         *t++ = '@';
 472         for(char* n = dhost; *n; n++)
 473                 *t++ = *n;
 474         *t = 0;
 475
 476         this->cached_fullhost = strdup(result);
 477
 478         return this->cached_fullhost;
 479 }
 480
 481 char* userrec::MakeWildHost()
 482 {
 483         static char nresult[MAXBUF];
 484         char* t = nresult;
 485         *t++ = '*';     *t++ = '!';
 486         *t++ = '*';     *t++ = '@';
 487         for(char* n = dhost; *n; n++)
 488                 *t++ = *n;
 489         *t = 0;
 490         return nresult;
 491 }
 492
 493 int userrec::ReadData(void* buffer, size_t size)
 494 {
 495         if (IS_LOCAL(this))
 496         {
 497 #ifndef WIN32
 498                 return read(this->fd, buffer, size);
 499 #else
 500                 return recv(this->fd, (char*)buffer, size, 0);
 501 #endif
 502         }
 503         else
 504                 return 0;
 505 }
 506
 507
 508 char* userrec::GetFullRealHost()
 509 {
 510         if (this->cached_fullrealhost)
 511                 return this->cached_fullrealhost;
 512
 513         char fresult[MAXBUF];
 514         char* t = fresult;
 515         for(char* n = nick; *n; n++)
 516                 *t++ = *n;
 517         *t++ = '!';
 518         for(char* n = ident; *n; n++)
 519                 *t++ = *n;
 520         *t++ = '@';
 521         for(char* n = host; *n; n++)
 522                 *t++ = *n;
 523         *t = 0;
 524
 525         this->cached_fullrealhost = strdup(fresult);
 526
 527         return this->cached_fullrealhost;
 528 }
 529
 530 bool userrec::IsInvited(const irc::string &channel)
 531 {
 532         for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 533         {
 534                 if (channel == *i)
 535                 {
 536                         return true;
 537                 }
 538         }
 539         return false;
 540 }
 541
 542 InvitedList* userrec::GetInviteList()
 543 {
 544         return &invites;
 545 }
 546
 547 void userrec::InviteTo(const irc::string &channel)
 548 {
 549         invites.push_back(channel);
 550 }
 551
 552 void userrec::RemoveInvite(const irc::string &channel)
 553 {
 554         for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 555         {
 556                 if (channel == *i)
 557                 {
 558                         invites.erase(i);
 559                         return;
 560                 }
 561         }
 562 }
 563
 564 bool userrec::HasPermission(const std::string &command)
 565 {
 566         char* mycmd;
 567         char* savept;
 568         char* savept2;
 569
 570         /*
 571          * users on remote servers can completely bypass all permissions based checks.
 572          * This prevents desyncs when one server has different type/class tags to another.
 573          * That having been said, this does open things up to the possibility of source changes
 574          * allowing remote kills, etc - but if they have access to the src, they most likely have
 575          * access to the conf - so it's an end to a means either way.
 576          */
 577         if (!IS_LOCAL(this))
 578                 return true;
 579
 580         // are they even an oper at all?
 581         if (IS_OPER(this))
 582         {
 583                 opertype_t::iterator iter_opertype = ServerInstance->Config->opertypes.find(this->oper);
 584                 if (iter_opertype != ServerInstance->Config->opertypes.end())
 585                 {
 586                         char* Classes = strdup(iter_opertype->second);
 587                         char* myclass = strtok_r(Classes," ",&savept);
 588                         while (myclass)
 589                         {
 590                                 operclass_t::iterator iter_operclass = ServerInstance->Config->operclass.find(myclass);
 591                                 if (iter_operclass != ServerInstance->Config->operclass.end())
 592                                 {
 593                                         char* CommandList = strdup(iter_operclass->second);
 594                                         mycmd = strtok_r(CommandList," ",&savept2);
 595                                         while (mycmd)
 596                                         {
 597                                                 if ((!strcasecmp(mycmd,command.c_str())) || (*mycmd == '*'))
 598                                                 {
 599                                                         free(Classes);
 600                                                         free(CommandList);
 601                                                         return true;
 602                                                 }
 603                                                 mycmd = strtok_r(NULL," ",&savept2);
 604                                         }
 605                                         free(CommandList);
 606                                 }
 607                                 myclass = strtok_r(NULL," ",&savept);
 608                         }
 609                         free(Classes);
 610                 }
 611         }
 612         return false;
 613 }
 614
 615 /** NOTE: We cannot pass a const reference to this method.
 616  * The string is changed by the workings of the method,
 617  * so that if we pass const ref, we end up copying it to
 618  * something we can change anyway. Makes sense to just let
 619  * the compiler do that copy for us.
 620  */
 621 bool userrec::AddBuffer(std::string a)
 622 {
 623         try
 624         {
 625                 std::string::size_type i = a.rfind('\r');
 626
 627                 while (i != std::string::npos)
 628                 {
 629                         a.erase(i, 1);
 630                         i = a.rfind('\r');
 631                 }
 632
 633                 if (a.length())
 634                         recvq.append(a);
 635
 636                 if (recvq.length() > (unsigned)this->recvqmax)
 637                 {
 638                         this->SetWriteError("RecvQ exceeded");
 639                         ServerInstance->WriteOpers("*** User %s RecvQ of %d exceeds connect class maximum of %d",this->nick,recvq.length(),this->recvqmax);
 640                         return false;
 641                 }
 642
 643                 return true;
 644         }
 645
 646         catch (...)
 647         {
 648                 ServerInstance->Log(DEBUG,"Exception in userrec::AddBuffer()");
 649                 return false;
 650         }
 651 }
 652
 653 bool userrec::BufferIsReady()
 654 {
 655         return (recvq.find('\n') != std::string::npos);
 656 }
 657
 658 void userrec::ClearBuffer()
 659 {
 660         recvq.clear();
 661 }
 662
 663 std::string userrec::GetBuffer()
 664 {
 665         try
 666         {
 667                 if (!recvq.length())
 668                         return "";
 669
 670                 /* Strip any leading \r or \n off the string.
 671                  * Usually there are only one or two of these,
 672                  * so its is computationally cheap to do.
 673                  */
 674                 std::string::iterator t = recvq.begin();
 675                 while (t != recvq.end() && (*t == '\r' || *t == '\n'))
 676                 {
 677                         recvq.erase(t);
 678                         t = recvq.begin();
 679                 }
 680
 681                 for (std::string::iterator x = recvq.begin(); x != recvq.end(); x++)
 682                 {
 683                         /* Find the first complete line, return it as the
 684                          * result, and leave the recvq as whats left
 685                          */
 686                         if (*x == '\n')
 687                         {
 688                                 std::string ret = std::string(recvq.begin(), x);
 689                                 recvq.erase(recvq.begin(), x + 1);
 690                                 return ret;
 691                         }
 692                 }
 693                 return "";
 694         }
 695
 696         catch (...)
 697         {
 698                 ServerInstance->Log(DEBUG,"Exception in userrec::GetBuffer()");
 699                 return "";
 700         }
 701 }
 702
 703 void userrec::AddWriteBuf(const std::string &data)
 704 {
 705         if (*this->GetWriteError())
 706                 return;
 707
 708         if (sendq.length() + data.length() > (unsigned)this->sendqmax)
 709         {
 710                 /*
 711                  * Fix by brain - Set the error text BEFORE calling writeopers, because
 712                  * if we dont it'll recursively  call here over and over again trying
 713                  * to repeatedly add the text to the sendq!
 714                  */
 715                 this->SetWriteError("SendQ exceeded");
 716                 ServerInstance->WriteOpers("*** User %s SendQ of %d exceeds connect class maximum of %d",this->nick,sendq.length() + data.length(),this->sendqmax);
 717                 return;
 718         }
 719
 720         try
 721         {
 722                 if (data.length() > MAXBUF - 2) /* MAXBUF has a value of 514, to account for line terminators */
 723                         sendq.append(data.substr(0,MAXBUF - 4)).append("\r\n"); /* MAXBUF-4 = 510 */
 724                 else
 725                         sendq.append(data);
 726         }
 727         catch (...)
 728         {
 729                 this->SetWriteError("SendQ exceeded");
 730                 ServerInstance->WriteOpers("*** User %s SendQ got an exception",this->nick);
 731         }
 732 }
 733
 734 // send AS MUCH OF THE USERS SENDQ as we are able to (might not be all of it)
 735 void userrec::FlushWriteBuf()
 736 {
 737         try
 738         {
 739                 if ((this->fd == FD_MAGIC_NUMBER) || (*this->GetWriteError()))
 740                 {
 741                         sendq.clear();
 742                 }
 743                 if ((sendq.length()) && (this->fd != FD_MAGIC_NUMBER))
 744                 {
 745                         int old_sendq_length = sendq.length();
 746                         int n_sent = ServerInstance->SE->Send(this, this->sendq.data(), this->sendq.length(), 0);
 747
 748                         if (n_sent == -1)
 749                         {
 750                                 if (errno == EAGAIN)
 751                                 {
 752                                         /* The socket buffer is full. This isnt fatal,
 753                                          * try again later.
 754                                          */
 755                                         this->ServerInstance->SE->WantWrite(this);
 756                                 }
 757                                 else
 758                                 {
 759                                         /* Fatal error, set write error and bail
 760                                          */
 761                                         this->SetWriteError(errno ? strerror(errno) : "EOF from client");
 762                                         return;
 763                                 }
 764                         }
 765                         else
 766                         {
 767                                 /* advance the queue */
 768                                 if (n_sent)
 769                                         this->sendq = this->sendq.substr(n_sent);
 770                                 /* update the user's stats counters */
 771                                 this->bytes_out += n_sent;
 772                                 this->cmds_out++;
 773                                 if (n_sent != old_sendq_length)
 774                                         this->ServerInstance->SE->WantWrite(this);
 775                         }
 776                 }
 777         }
 778
 779         catch (...)
 780         {
 781                 ServerInstance->Log(DEBUG,"Exception in userrec::FlushWriteBuf()");
 782         }
 783
 784         if (this->sendq.empty())
 785         {
 786                 FOREACH_MOD(I_OnBufferFlushed,OnBufferFlushed(this));
 787         }
 788 }
 789
 790 void userrec::SetWriteError(const std::string &error)
 791 {
 792         try
 793         {
 794                 // don't try to set the error twice, its already set take the first string.
 795                 if (this->WriteError.empty())
 796                         this->WriteError = error;
 797         }
 798
 799         catch (...)
 800         {
 801                 ServerInstance->Log(DEBUG,"Exception in userrec::SetWriteError()");
 802         }
 803 }
 804
 805 const char* userrec::GetWriteError()
 806 {
 807         return this->WriteError.c_str();
 808 }
 809
 810 void userrec::Oper(const std::string &opertype)
 811 {
 812         try
 813         {
 814                 this->modes[UM_OPERATOR] = 1;
 815                 this->WriteServ("MODE %s :+o", this->nick);
 816                 FOREACH_MOD(I_OnOper, OnOper(this, opertype));
 817                 ServerInstance->Log(DEFAULT,"OPER: %s!%s@%s opered as type: %s", this->nick, this->ident, this->host, opertype.c_str());
 818                 strlcpy(this->oper, opertype.c_str(), NICKMAX - 1);
 819                 ServerInstance->all_opers.push_back(this);
 820                 FOREACH_MOD(I_OnPostOper,OnPostOper(this, opertype));
 821         }
 822
 823         catch (...)
 824         {
 825                 ServerInstance->Log(DEBUG,"Exception in userrec::Oper()");
 826         }
 827 }
 828
 829 void userrec::UnOper()
 830 {
 831         try
 832         {
 833                 if (IS_OPER(this))
 834                 {
 835                         // unset their oper type (what IS_OPER checks), and remove +o
 836                         *this->oper = 0;
 837                         this->modes[UM_OPERATOR] = 0;
 838
 839                         // remove the user from the oper list. Will remove multiple entries as a safeguard against bug #404
 840                         ServerInstance->all_opers.remove(this);
 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->Write("ERROR :Closing link (%s@%s) [%s]", user->ident, user->host, operreason);
 853         user->muted = true;
 854         Instance->GlobalCulls.AddItem(user, quitreason.c_str(), operreason);
 855 }
 856
 857 /* adds or updates an entry in the whowas list */
 858 void userrec::AddToWhoWas()
 859 {
 860         command_t* whowas_command = ServerInstance->Parser->GetHandler("WHOWAS");
 861         if (whowas_command)
 862         {
 863                 std::deque<classbase*> params;
 864                 params.push_back(this);
 865                 whowas_command->HandleInternal(WHOWAS_ADD, params);
 866         }
 867 }
 868
 869 /* add a client connection to the sockets list */
 870 void userrec::AddClient(InspIRCd* Instance, int socket, int port, bool iscached, int socketfamily, sockaddr* ip)
 871 {
 872         /* NOTE: Calling this one parameter constructor for userrec automatically
 873          * allocates a new UUID and places it in the hash_map.
 874          */
 875         userrec* New = NULL;
 876         try
 877         {
 878                 New = new userrec(Instance);
 879         }
 880         catch (...)
 881         {
 882                 Instance->Log(DEFAULT,"*** WTF *** Duplicated UUID! -- Crack smoking monkies have been unleashed.");
 883                 Instance->WriteOpers("*** WARNING *** Duplicate UUID allocated!");
 884                 return;
 885         }
 886
 887         int j = 0;
 888
 889         Instance->unregistered_count++;
 890
 891         char ipaddr[MAXBUF];
 892 #ifdef IPV6
 893         if (socketfamily == AF_INET6)
 894                 inet_ntop(AF_INET6, &((const sockaddr_in6*)ip)->sin6_addr, ipaddr, sizeof(ipaddr));
 895         else
 896 #endif
 897         inet_ntop(AF_INET, &((const sockaddr_in*)ip)->sin_addr, ipaddr, sizeof(ipaddr));
 898
 899         (*(Instance->clientlist))[New->uuid] = New;
 900         New->SetFd(socket);
 901
 902         /* The users default nick is their UUID */
 903         strlcpy(New->nick, New->uuid, NICKMAX - 1);
 904
 905         New->server = Instance->FindServerNamePtr(Instance->Config->ServerName);
 906         /* We don't need range checking here, we KNOW 'unknown\0' will fit into the ident field. */
 907         strcpy(New->ident, "unknown");
 908
 909         New->registered = REG_NONE;
 910         New->signon = Instance->Time() + Instance->Config->dns_timeout;
 911         New->lastping = 1;
 912
 913         New->SetSockAddr(socketfamily, ipaddr, port);
 914
 915         /* Smarter than your average bear^H^H^H^Hset of strlcpys. */
 916         for (const char* temp = New->GetIPString(); *temp && j < 64; temp++, j++)
 917                 New->dhost[j] = New->host[j] = *temp;
 918         New->dhost[j] = New->host[j] = 0;
 919
 920         Instance->AddLocalClone(New);
 921         Instance->AddGlobalClone(New);
 922
 923         /*
 924          * First class check. We do this again in FullConnect after DNS is done, and NICK/USER is recieved.
 925          * See my note down there for why this is required. DO NOT REMOVE. :) -- w00t
 926          */
 927         ConnectClass* i = New->GetClass();
 928
 929         if (!i)
 930         {
 931                 userrec::QuitUser(Instance, New, "Access denied by configuration");
 932                 return;
 933         }
 934
 935         /*
 936          * Check connect class settings and initialise settings into userrec.
 937          * This will be done again after DNS resolution. -- w00t
 938          */
 939         New->CheckClass();
 940
 941         Instance->local_users.push_back(New);
 942
 943         if ((Instance->local_users.size() > Instance->Config->SoftLimit) || (Instance->local_users.size() >= MAXCLIENTS))
 944         {
 945                 Instance->WriteOpers("*** Warning: softlimit value has been reached: %d clients", Instance->Config->SoftLimit);
 946                 userrec::QuitUser(Instance, New,"No more connections allowed");
 947                 return;
 948         }
 949
 950         /*
 951          * XXX -
 952          * this is done as a safety check to keep the file descriptors within range of fd_ref_table.
 953          * its a pretty big but for the moment valid assumption:
 954          * file descriptors are handed out starting at 0, and are recycled as theyre freed.
 955          * therefore if there is ever an fd over 65535, 65536 clients must be connected to the
 956          * irc server at once (or the irc server otherwise initiating this many connections, files etc)
 957          * which for the time being is a physical impossibility (even the largest networks dont have more
 958          * than about 10,000 users on ONE server!)
 959          */
 960 #ifndef WINDOWS
 961         if ((unsigned int)socket >= MAX_DESCRIPTORS)
 962         {
 963                 userrec::QuitUser(Instance, New, "Server is full");
 964                 return;
 965         }
 966 #endif
 967
 968         New->exempt = (Instance->XLines->matches_exception(New) != NULL);
 969         if (!New->exempt)
 970         {
 971                 ZLine* r = Instance->XLines->matches_zline(ipaddr);
 972                 if (r)
 973                 {
 974                         char reason[MAXBUF];
 975                         if (*Instance->Config->MoronBanner)
 976                                 New->WriteServ("NOTICE %s :*** %s", New->nick, Instance->Config->MoronBanner);
 977                         snprintf(reason,MAXBUF,"Z-Lined: %s",r->reason);
 978                         userrec::QuitUser(Instance, New, reason);
 979                         return;
 980                 }
 981         }
 982
 983         if (socket > -1)
 984         {
 985                 if (!Instance->SE->AddFd(New))
 986                 {
 987                         userrec::QuitUser(Instance, New, "Internal error handling connection");
 988                 }
 989         }
 990
 991         /* NOTE: even if dns lookups are *off*, we still need to display this.
 992          * BOPM and other stuff requires it.
 993          */
 994         New->WriteServ("NOTICE Auth :*** Looking up your hostname...");
 995 }
 996
 997 unsigned long userrec::GlobalCloneCount()
 998 {
 999         clonemap::iterator x = ServerInstance->global_clones.find(this->GetIPString());
1000         if (x != ServerInstance->global_clones.end())
1001                 return x->second;
1002         else
1003                 return 0;
1004 }
1005
1006 unsigned long userrec::LocalCloneCount()
1007 {
1008         clonemap::iterator x = ServerInstance->local_clones.find(this->GetIPString());
1009         if (x != ServerInstance->local_clones.end())
1010                 return x->second;
1011         else
1012                 return 0;
1013 }
1014
1015 /*
1016  * Check class restrictions
1017  */
1018 void userrec::CheckClass(const std::string &explicit_class)
1019 {
1020         ConnectClass* a = this->GetClass(explicit_class);
1021
1022         if ((!a) || (a->GetType() == CC_DENY))
1023         {
1024                 userrec::QuitUser(ServerInstance, this, "Unauthorised connection");
1025                 return;
1026         }
1027         else if ((a->GetMaxLocal()) && (this->LocalCloneCount() > a->GetMaxLocal()))
1028         {
1029                 userrec::QuitUser(ServerInstance, this, "No more connections allowed from your host via this connect class (local)");
1030                 ServerInstance->WriteOpers("*** WARNING: maximum LOCAL connections (%ld) exceeded for IP %s", a->GetMaxLocal(), this->GetIPString());
1031                 return;
1032         }
1033         else if ((a->GetMaxGlobal()) && (this->GlobalCloneCount() > a->GetMaxGlobal()))
1034         {
1035                 userrec::QuitUser(ServerInstance, this, "No more connections allowed from your host via this connect class (global)");
1036                 ServerInstance->WriteOpers("*** WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s", a->GetMaxGlobal(), this->GetIPString());
1037                 return;
1038         }
1039
1040         this->pingmax = a->GetPingTime();
1041         this->nping = ServerInstance->Time() + a->GetPingTime() + ServerInstance->Config->dns_timeout;
1042         this->timeout = ServerInstance->Time() + a->GetRegTimeout();
1043         this->flood = a->GetFlood();
1044         this->threshold = a->GetThreshold();
1045         this->sendqmax = a->GetSendqMax();
1046         this->recvqmax = a->GetRecvqMax();
1047         this->MaxChans = a->GetMaxChans();
1048 }
1049
1050 void userrec::FullConnect()
1051 {
1052         ServerInstance->stats->statsConnects++;
1053         this->idle_lastmsg = ServerInstance->Time();
1054
1055         /*
1056          * You may be thinking "wtf, we checked this in userrec::AddClient!" - and yes, we did, BUT.
1057          * At the time AddClient is called, we don't have a resolved host, by here we probably do - which
1058          * may put the user into a totally seperate class with different restrictions! so we *must* check again.
1059          * Don't remove this! -- w00t
1060          */
1061         this->CheckClass();
1062
1063         /* Check the password, if one is required by the user's connect class.
1064          * This CANNOT be in CheckClass(), because that is called prior to PASS as well!
1065          */
1066         if ((!this->GetClass()->GetPass().empty()) && (!this->haspassed))
1067         {
1068                 userrec::QuitUser(ServerInstance, this, "Invalid password");
1069                 return;
1070         }
1071
1072         if (!this->exempt)
1073         {
1074                 GLine* r = ServerInstance->XLines->matches_gline(this);
1075
1076                 if (r)
1077                 {
1078                         this->muted = true;
1079                         char reason[MAXBUF];
1080                         if (*ServerInstance->Config->MoronBanner)
1081                                 this->WriteServ("NOTICE %s :*** %s", this->nick, ServerInstance->Config->MoronBanner);
1082                         snprintf(reason,MAXBUF,"G-Lined: %s",r->reason);
1083                         userrec::QuitUser(ServerInstance, this, reason);
1084                         return;
1085                 }
1086
1087                 KLine* n = ServerInstance->XLines->matches_kline(this);
1088
1089                 if (n)
1090                 {
1091                         this->muted = true;
1092                         char reason[MAXBUF];
1093                         if (*ServerInstance->Config->MoronBanner)
1094                                 this->WriteServ("NOTICE %s :*** %s", this, ServerInstance->Config->MoronBanner);
1095                         snprintf(reason,MAXBUF,"K-Lined: %s",n->reason);
1096                         userrec::QuitUser(ServerInstance, this, reason);
1097                         return;
1098                 }
1099         }
1100
1101         this->WriteServ("NOTICE Auth :Welcome to \002%s\002!",ServerInstance->Config->Network);
1102         this->WriteServ("001 %s :Welcome to the %s IRC Network %s!%s@%s",this->nick, ServerInstance->Config->Network, this->nick, this->ident, this->host);
1103         this->WriteServ("002 %s :Your host is %s, running version %s",this->nick,ServerInstance->Config->ServerName,VERSION);
1104         this->WriteServ("003 %s :This server was created %s %s", this->nick, __TIME__, __DATE__);
1105         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());
1106
1107         ServerInstance->Config->Send005(this);
1108
1109         this->WriteServ("042 %s %s :your unique ID", this->nick, this->uuid);
1110
1111
1112         this->ShowMOTD();
1113
1114         /* Now registered */
1115         if (ServerInstance->unregistered_count)
1116                 ServerInstance->unregistered_count--;
1117
1118         /* Trigger LUSERS output, give modules a chance too */
1119         int MOD_RESULT = 0;
1120         FOREACH_RESULT(I_OnPreCommand, OnPreCommand("LUSERS", NULL, 0, this, true, "LUSERS"));
1121         if (!MOD_RESULT)
1122                 ServerInstance->CallCommandHandler("LUSERS", NULL, 0, this);
1123
1124         /*
1125          * fix 3 by brain, move registered = 7 below these so that spurious modes and host
1126          * changes dont go out onto the network and produce 'fake direction'.
1127          */
1128         FOREACH_MOD(I_OnUserConnect,OnUserConnect(this));
1129
1130         this->registered = REG_ALL;
1131
1132         FOREACH_MOD(I_OnPostConnect,OnPostConnect(this));
1133
1134         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);
1135 }
1136
1137 /** userrec::UpdateNick()
1138  * re-allocates a nick in the user_hash after they change nicknames,
1139  * returns a pointer to the new user as it may have moved
1140  */
1141 userrec* userrec::UpdateNickHash(const char* New)
1142 {
1143         try
1144         {
1145                 //user_hash::iterator newnick;
1146                 user_hash::iterator oldnick = ServerInstance->clientlist->find(this->nick);
1147
1148                 if (!strcasecmp(this->nick,New))
1149                         return oldnick->second;
1150
1151                 if (oldnick == ServerInstance->clientlist->end())
1152                         return NULL; /* doesnt exist */
1153
1154                 userrec* olduser = oldnick->second;
1155                 (*(ServerInstance->clientlist))[New] = olduser;
1156                 ServerInstance->clientlist->erase(oldnick);
1157                 return olduser;
1158         }
1159
1160         catch (...)
1161         {
1162                 ServerInstance->Log(DEBUG,"Exception in userrec::UpdateNickHash()");
1163                 return NULL;
1164         }
1165 }
1166
1167 void userrec::InvalidateCache()
1168 {
1169         /* Invalidate cache */
1170         if (cached_fullhost)
1171                 free(cached_fullhost);
1172         if (cached_hostip)
1173                 free(cached_hostip);
1174         if (cached_makehost)
1175                 free(cached_makehost);
1176         if (cached_fullrealhost)
1177                 free(cached_fullrealhost);
1178         cached_fullhost = cached_hostip = cached_makehost = cached_fullrealhost = NULL;
1179 }
1180
1181 bool userrec::ForceNickChange(const char* newnick)
1182 {
1183         try
1184         {
1185                 int MOD_RESULT = 0;
1186
1187                 this->InvalidateCache();
1188
1189                 FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(this, newnick));
1190
1191                 if (MOD_RESULT)
1192                 {
1193                         ServerInstance->stats->statsCollisions++;
1194                         return false;
1195                 }
1196
1197                 if (ServerInstance->XLines->matches_qline(newnick))
1198                 {
1199                         ServerInstance->stats->statsCollisions++;
1200                         return false;
1201                 }
1202
1203                 if (this->registered == REG_ALL)
1204                 {
1205                         std::deque<classbase*> dummy;
1206                         command_t* nickhandler = ServerInstance->Parser->GetHandler("NICK");
1207                         if (nickhandler)
1208                         {
1209                                 nickhandler->HandleInternal(1, dummy);
1210                                 bool result = (ServerInstance->Parser->CallHandler("NICK", &newnick, 1, this) == CMD_SUCCESS);
1211                                 nickhandler->HandleInternal(0, dummy);
1212                                 return result;
1213                         }
1214                 }
1215                 return false;
1216         }
1217
1218         catch (...)
1219         {
1220                 ServerInstance->Log(DEBUG,"Exception in userrec::ForceNickChange()");
1221                 return false;
1222         }
1223 }
1224
1225 void userrec::SetSockAddr(int protocol_family, const char* ip, int port)
1226 {
1227         switch (protocol_family)
1228         {
1229 #ifdef SUPPORT_IP6LINKS
1230                 case AF_INET6:
1231                 {
1232                         sockaddr_in6* sin = new sockaddr_in6;
1233                         sin->sin6_family = AF_INET6;
1234                         sin->sin6_port = port;
1235                         inet_pton(AF_INET6, ip, &sin->sin6_addr);
1236                         this->ip = (sockaddr*)sin;
1237                 }
1238                 break;
1239 #endif
1240                 case AF_INET:
1241                 {
1242                         sockaddr_in* sin = new sockaddr_in;
1243                         sin->sin_family = AF_INET;
1244                         sin->sin_port = port;
1245                         inet_pton(AF_INET, ip, &sin->sin_addr);
1246                         this->ip = (sockaddr*)sin;
1247                 }
1248                 break;
1249                 default:
1250                         ServerInstance->Log(DEBUG,"Ut oh, I dont know protocol %d to be set on '%s'!", protocol_family, this->nick);
1251                 break;
1252         }
1253 }
1254
1255 int userrec::GetPort()
1256 {
1257         if (this->ip == NULL)
1258                 return 0;
1259
1260         switch (this->GetProtocolFamily())
1261         {
1262 #ifdef SUPPORT_IP6LINKS
1263                 case AF_INET6:
1264                 {
1265                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1266                         return sin->sin6_port;
1267                 }
1268                 break;
1269 #endif
1270                 case AF_INET:
1271                 {
1272                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1273                         return sin->sin_port;
1274                 }
1275                 break;
1276                 default:
1277                 break;
1278         }
1279         return 0;
1280 }
1281
1282 int userrec::GetProtocolFamily()
1283 {
1284         if (this->ip == NULL)
1285                 return 0;
1286
1287         sockaddr_in* sin = (sockaddr_in*)this->ip;
1288         return sin->sin_family;
1289 }
1290
1291 const char* userrec::GetIPString()
1292 {
1293         static char buf[1024];
1294
1295         if (this->ip == NULL)
1296                 return "";
1297
1298         switch (this->GetProtocolFamily())
1299         {
1300 #ifdef SUPPORT_IP6LINKS
1301                 case AF_INET6:
1302                 {
1303                         static char temp[1024];
1304
1305                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1306                         inet_ntop(sin->sin6_family, &sin->sin6_addr, buf, sizeof(buf));
1307                         /* IP addresses starting with a : on irc are a Bad Thing (tm) */
1308                         if (*buf == ':')
1309                         {
1310                                 strlcpy(&temp[1], buf, sizeof(temp) - 1);
1311                                 *temp = '0';
1312                                 return temp;
1313                         }
1314                         return buf;
1315                 }
1316                 break;
1317 #endif
1318                 case AF_INET:
1319                 {
1320                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1321                         inet_ntop(sin->sin_family, &sin->sin_addr, buf, sizeof(buf));
1322                         return buf;
1323                 }
1324                 break;
1325                 default:
1326                 break;
1327         }
1328         return "";
1329 }
1330
1331 const char* userrec::GetIPString(char* buf)
1332 {
1333         if (this->ip == NULL)
1334         {
1335                 *buf = 0;
1336                 return buf;
1337         }
1338
1339         switch (this->GetProtocolFamily())
1340         {
1341 #ifdef SUPPORT_IP6LINKS
1342                 case AF_INET6:
1343                 {
1344                         static char temp[1024];
1345
1346                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1347                         inet_ntop(sin->sin6_family, &sin->sin6_addr, buf, sizeof(buf));
1348                         /* IP addresses starting with a : on irc are a Bad Thing (tm) */
1349                         if (*buf == ':')
1350                         {
1351                                 strlcpy(&temp[1], buf, sizeof(temp) - 1);
1352                                 *temp = '0';
1353                                 strlcpy(buf, temp, sizeof(temp));
1354                         }
1355                         return buf;
1356                 }
1357                 break;
1358 #endif
1359                 case AF_INET:
1360                 {
1361                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1362                         inet_ntop(sin->sin_family, &sin->sin_addr, buf, sizeof(buf));
1363                         return buf;
1364                 }
1365                 break;
1366
1367                 default:
1368                 break;
1369         }
1370         return "";
1371 }
1372
1373 /** NOTE: We cannot pass a const reference to this method.
1374  * The string is changed by the workings of the method,
1375  * so that if we pass const ref, we end up copying it to
1376  * something we can change anyway. Makes sense to just let
1377  * the compiler do that copy for us.
1378  */
1379 void userrec::Write(std::string text)
1380 {
1381         if (!ServerInstance->SE->BoundsCheckFd(this))
1382                 return;
1383
1384         try
1385         {
1386                 /* ServerInstance->Log(DEBUG,"C[%d] O %s", this->GetFd(), text.c_str());
1387                  * WARNING: The above debug line is VERY loud, do NOT
1388                  * enable it till we have a good way of filtering it
1389                  * out of the logs (e.g. 1.2 would be good).
1390                  */
1391                 text.append("\r\n");
1392         }
1393         catch (...)
1394         {
1395                 ServerInstance->Log(DEBUG,"Exception in userrec::Write() std::string::append");
1396                 return;
1397         }
1398
1399         if (ServerInstance->Config->GetIOHook(this->GetPort()))
1400         {
1401                 try
1402                 {
1403                         /* XXX: The lack of buffering here is NOT a bug, modules implementing this interface have to
1404                          * implement their own buffering mechanisms
1405                          */
1406                         ServerInstance->Config->GetIOHook(this->GetPort())->OnRawSocketWrite(this->fd, text.data(), text.length());
1407                 }
1408                 catch (CoreException& modexcept)
1409                 {
1410                         ServerInstance->Log(DEBUG, "%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
1411                 }
1412         }
1413         else
1414         {
1415                 this->AddWriteBuf(text);
1416         }
1417         ServerInstance->stats->statsSent += text.length();
1418         this->ServerInstance->SE->WantWrite(this);
1419 }
1420
1421 /** Write()
1422  */
1423 void userrec::Write(const char *text, ...)
1424 {
1425         va_list argsPtr;
1426         char textbuffer[MAXBUF];
1427
1428         va_start(argsPtr, text);
1429         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1430         va_end(argsPtr);
1431
1432         this->Write(std::string(textbuffer));
1433 }
1434
1435 void userrec::WriteServ(const std::string& text)
1436 {
1437         char textbuffer[MAXBUF];
1438
1439         snprintf(textbuffer,MAXBUF,":%s %s",ServerInstance->Config->ServerName,text.c_str());
1440         this->Write(std::string(textbuffer));
1441 }
1442
1443 /** WriteServ()
1444  *  Same as Write(), except `text' is prefixed with `:server.name '.
1445  */
1446 void userrec::WriteServ(const char* text, ...)
1447 {
1448         va_list argsPtr;
1449         char textbuffer[MAXBUF];
1450
1451         va_start(argsPtr, text);
1452         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1453         va_end(argsPtr);
1454
1455         this->WriteServ(std::string(textbuffer));
1456 }
1457
1458
1459 void userrec::WriteFrom(userrec *user, const std::string &text)
1460 {
1461         char tb[MAXBUF];
1462
1463         snprintf(tb,MAXBUF,":%s %s",user->GetFullHost(),text.c_str());
1464
1465         this->Write(std::string(tb));
1466 }
1467
1468
1469 /* write text from an originating user to originating user */
1470
1471 void userrec::WriteFrom(userrec *user, const char* text, ...)
1472 {
1473         va_list argsPtr;
1474         char textbuffer[MAXBUF];
1475
1476         va_start(argsPtr, text);
1477         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1478         va_end(argsPtr);
1479
1480         this->WriteFrom(user, std::string(textbuffer));
1481 }
1482
1483
1484 /* write text to an destination user from a source user (e.g. user privmsg) */
1485
1486 void userrec::WriteTo(userrec *dest, const char *data, ...)
1487 {
1488         char textbuffer[MAXBUF];
1489         va_list argsPtr;
1490
1491         va_start(argsPtr, data);
1492         vsnprintf(textbuffer, MAXBUF, data, argsPtr);
1493         va_end(argsPtr);
1494
1495         this->WriteTo(dest, std::string(textbuffer));
1496 }
1497
1498 void userrec::WriteTo(userrec *dest, const std::string &data)
1499 {
1500         dest->WriteFrom(this, data);
1501 }
1502
1503
1504 void userrec::WriteCommon(const char* text, ...)
1505 {
1506         char textbuffer[MAXBUF];
1507         va_list argsPtr;
1508
1509         if (this->registered != REG_ALL)
1510                 return;
1511
1512         va_start(argsPtr, text);
1513         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1514         va_end(argsPtr);
1515
1516         this->WriteCommon(std::string(textbuffer));
1517 }
1518
1519 void userrec::WriteCommon(const std::string &text)
1520 {
1521         try
1522         {
1523                 bool sent_to_at_least_one = false;
1524                 char tb[MAXBUF];
1525
1526                 if (this->registered != REG_ALL)
1527                         return;
1528
1529                 uniq_id++;
1530
1531                 /* We dont want to be doing this n times, just once */
1532                 snprintf(tb,MAXBUF,":%s %s",this->GetFullHost(),text.c_str());
1533                 std::string out = tb;
1534
1535                 for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1536                 {
1537                         CUList* ulist = v->first->GetUsers();
1538                         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1539                         {
1540                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1541                                 {
1542                                         already_sent[i->first->fd] = uniq_id;
1543                                         i->first->Write(out);
1544                                         sent_to_at_least_one = true;
1545                                 }
1546                         }
1547                 }
1548
1549                 /*
1550                  * if the user was not in any channels, no users will receive the text. Make sure the user
1551                  * receives their OWN message for WriteCommon
1552                  */
1553                 if (!sent_to_at_least_one)
1554                 {
1555                         this->Write(std::string(tb));
1556                 }
1557         }
1558
1559         catch (...)
1560         {
1561                 ServerInstance->Log(DEBUG,"Exception in userrec::WriteCommon()");
1562         }
1563 }
1564
1565
1566 /* write a formatted string to all users who share at least one common
1567  * channel, NOT including the source user e.g. for use in QUIT
1568  */
1569
1570 void userrec::WriteCommonExcept(const char* text, ...)
1571 {
1572         char textbuffer[MAXBUF];
1573         va_list argsPtr;
1574
1575         va_start(argsPtr, text);
1576         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1577         va_end(argsPtr);
1578
1579         this->WriteCommonExcept(std::string(textbuffer));
1580 }
1581
1582 void userrec::WriteCommonQuit(const std::string &normal_text, const std::string &oper_text)
1583 {
1584         char tb1[MAXBUF];
1585         char tb2[MAXBUF];
1586
1587         if (this->registered != REG_ALL)
1588                 return;
1589
1590         uniq_id++;
1591         snprintf(tb1,MAXBUF,":%s QUIT :%s",this->GetFullHost(),normal_text.c_str());
1592         snprintf(tb2,MAXBUF,":%s QUIT :%s",this->GetFullHost(),oper_text.c_str());
1593         std::string out1 = tb1;
1594         std::string out2 = tb2;
1595
1596         for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1597         {
1598                 CUList *ulist = v->first->GetUsers();
1599                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1600                 {
1601                         if (this != i->first)
1602                         {
1603                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1604                                 {
1605                                         already_sent[i->first->fd] = uniq_id;
1606                                         i->first->Write(IS_OPER(i->first) ? out2 : out1);
1607                                 }
1608                         }
1609                 }
1610         }
1611 }
1612
1613 void userrec::WriteCommonExcept(const std::string &text)
1614 {
1615         char tb1[MAXBUF];
1616         std::string out1;
1617
1618         if (this->registered != REG_ALL)
1619                 return;
1620
1621         uniq_id++;
1622         snprintf(tb1,MAXBUF,":%s %s",this->GetFullHost(),text.c_str());
1623         out1 = tb1;
1624
1625         for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1626         {
1627                 CUList *ulist = v->first->GetUsers();
1628                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1629                 {
1630                         if (this != i->first)
1631                         {
1632                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1633                                 {
1634                                         already_sent[i->first->fd] = uniq_id;
1635                                         i->first->Write(out1);
1636                                 }
1637                         }
1638                 }
1639         }
1640
1641 }
1642
1643 void userrec::WriteWallOps(const std::string &text)
1644 {
1645         if (!IS_OPER(this) && IS_LOCAL(this))
1646                 return;
1647
1648         std::string wallop("WALLOPS :");
1649         wallop.append(text);
1650
1651         for (std::vector<userrec*>::const_iterator i = ServerInstance->local_users.begin(); i != ServerInstance->local_users.end(); i++)
1652         {
1653                 userrec* t = *i;
1654                 if (t->IsModeSet('w'))
1655                         this->WriteTo(t,wallop);
1656         }
1657 }
1658
1659 void userrec::WriteWallOps(const char* text, ...)
1660 {
1661         char textbuffer[MAXBUF];
1662         va_list argsPtr;
1663
1664         va_start(argsPtr, text);
1665         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1666         va_end(argsPtr);
1667
1668         this->WriteWallOps(std::string(textbuffer));
1669 }
1670
1671 /* return 0 or 1 depending if users u and u2 share one or more common channels
1672  * (used by QUIT, NICK etc which arent channel specific notices)
1673  *
1674  * The old algorithm in 1.0 for this was relatively inefficient, iterating over
1675  * the first users channels then the second users channels within the outer loop,
1676  * therefore it was a maximum of x*y iterations (upon returning 0 and checking
1677  * all possible iterations). However this new function instead checks against the
1678  * channel's userlist in the inner loop which is a std::map<userrec*,userrec*>
1679  * and saves us time as we already know what pointer value we are after.
1680  * Don't quote me on the maths as i am not a mathematician or computer scientist,
1681  * but i believe this algorithm is now x+(log y) maximum iterations instead.
1682  */
1683 bool userrec::SharesChannelWith(userrec *other)
1684 {
1685         if ((!other) || (this->registered != REG_ALL) || (other->registered != REG_ALL))
1686                 return false;
1687
1688         /* Outer loop */
1689         for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1690         {
1691                 /* Eliminate the inner loop (which used to be ~equal in size to the outer loop)
1692                  * by replacing it with a map::find which *should* be more efficient
1693                  */
1694                 if (i->first->HasUser(other))
1695                         return true;
1696         }
1697         return false;
1698 }
1699
1700 bool userrec::ChangeName(const char* gecos)
1701 {
1702         if (!strcmp(gecos, this->fullname))
1703                 return true;
1704
1705         if (IS_LOCAL(this))
1706         {
1707                 int MOD_RESULT = 0;
1708                 FOREACH_RESULT(I_OnChangeLocalUserGECOS,OnChangeLocalUserGECOS(this,gecos));
1709                 if (MOD_RESULT)
1710                         return false;
1711                 FOREACH_MOD(I_OnChangeName,OnChangeName(this,gecos));
1712         }
1713         strlcpy(this->fullname,gecos,MAXGECOS+1);
1714
1715         return true;
1716 }
1717
1718 bool userrec::ChangeDisplayedHost(const char* host)
1719 {
1720         if (!strcmp(host, this->dhost))
1721                 return true;
1722
1723         if (IS_LOCAL(this))
1724         {
1725                 int MOD_RESULT = 0;
1726                 FOREACH_RESULT(I_OnChangeLocalUserHost,OnChangeLocalUserHost(this,host));
1727                 if (MOD_RESULT)
1728                         return false;
1729                 FOREACH_MOD(I_OnChangeHost,OnChangeHost(this,host));
1730         }
1731         if (this->ServerInstance->Config->CycleHosts)
1732                 this->WriteCommonExcept("QUIT :Changing hosts");
1733
1734         /* Fix by Om: userrec::dhost is 65 long, this was truncating some long hosts */
1735         strlcpy(this->dhost,host,64);
1736
1737         this->InvalidateCache();
1738
1739         if (this->ServerInstance->Config->CycleHosts)
1740         {
1741                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1742                 {
1743                         i->first->WriteAllExceptSender(this, false, 0, "JOIN %s", i->first->name);
1744                         std::string n = this->ServerInstance->Modes->ModeString(this, i->first);
1745                         if (n.length() > 0)
1746                                 i->first->WriteAllExceptSender(this, true, 0, "MODE %s +%s", i->first->name, n.c_str());
1747                 }
1748         }
1749
1750         if (IS_LOCAL(this))
1751                 this->WriteServ("396 %s %s :is now your displayed host",this->nick,this->dhost);
1752
1753         return true;
1754 }
1755
1756 bool userrec::ChangeIdent(const char* newident)
1757 {
1758         if (!strcmp(newident, this->ident))
1759                 return true;
1760
1761         if (this->ServerInstance->Config->CycleHosts)
1762                 this->WriteCommonExcept("%s","QUIT :Changing ident");
1763
1764         strlcpy(this->ident, newident, IDENTMAX+2);
1765
1766         this->InvalidateCache();
1767
1768         if (this->ServerInstance->Config->CycleHosts)
1769         {
1770                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1771                 {
1772                         i->first->WriteAllExceptSender(this, false, 0, "JOIN %s", i->first->name);
1773                         std::string n = this->ServerInstance->Modes->ModeString(this, i->first);
1774                         if (n.length() > 0)
1775                                 i->first->WriteAllExceptSender(this, true, 0, "MODE %s +%s", i->first->name, n.c_str());
1776                 }
1777         }
1778
1779         return true;
1780 }
1781
1782 void userrec::SendAll(const char* command, char* text, ...)
1783 {
1784         char textbuffer[MAXBUF];
1785         char formatbuffer[MAXBUF];
1786         va_list argsPtr;
1787
1788         va_start(argsPtr, text);
1789         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1790         va_end(argsPtr);
1791
1792         snprintf(formatbuffer,MAXBUF,":%s %s $* :%s", this->GetFullHost(), command, textbuffer);
1793         std::string fmt = formatbuffer;
1794
1795         for (std::vector<userrec*>::const_iterator i = ServerInstance->local_users.begin(); i != ServerInstance->local_users.end(); i++)
1796         {
1797                 (*i)->Write(fmt);
1798         }
1799 }
1800
1801
1802 std::string userrec::ChannelList(userrec* source)
1803 {
1804         try
1805         {
1806                 std::string list;
1807                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1808                 {
1809                         /* If the target is the same as the sender, let them see all their channels.
1810                          * If the channel is NOT private/secret OR the user shares a common channel
1811                          * If the user is an oper, and the <options:operspywhois> option is set.
1812                          */
1813                         if ((source == this) || (IS_OPER(source) && ServerInstance->Config->OperSpyWhois) || (((!i->first->IsModeSet('p')) && (!i->first->IsModeSet('s'))) || (i->first->HasUser(source))))
1814                         {
1815                                 list.append(i->first->GetPrefixChar(this)).append(i->first->name).append(" ");
1816                         }
1817                 }
1818                 return list;
1819         }
1820         catch (...)
1821         {
1822                 ServerInstance->Log(DEBUG,"Exception in userrec::ChannelList()");
1823                 return "";
1824         }
1825 }
1826
1827 void userrec::SplitChanList(userrec* dest, const std::string &cl)
1828 {
1829         std::string line;
1830         std::ostringstream prefix;
1831         std::string::size_type start, pos, length;
1832
1833         try
1834         {
1835                 prefix << this->nick << " " << dest->nick << " :";
1836                 line = prefix.str();
1837                 int namelen = strlen(ServerInstance->Config->ServerName) + 6;
1838
1839                 for (start = 0; (pos = cl.find(' ', start)) != std::string::npos; start = pos+1)
1840                 {
1841                         length = (pos == std::string::npos) ? cl.length() : pos;
1842
1843                         if (line.length() + namelen + length - start > 510)
1844                         {
1845                                 ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1846                                 line = prefix.str();
1847                         }
1848
1849                         if(pos == std::string::npos)
1850                         {
1851                                 line.append(cl.substr(start, length - start));
1852                                 break;
1853                         }
1854                         else
1855                         {
1856                                 line.append(cl.substr(start, length - start + 1));
1857                         }
1858                 }
1859
1860                 if (line.length())
1861                 {
1862                         ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1863                 }
1864         }
1865
1866         catch (...)
1867         {
1868                 ServerInstance->Log(DEBUG,"Exception in userrec::SplitChanList()");
1869         }
1870 }
1871
1872 unsigned int userrec::GetMaxChans()
1873 {
1874         return this->MaxChans;
1875 }
1876
1877 /* looks up a users password for their connection class (<ALLOW>/<DENY> tags)
1878  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1879  * then their ip will be taken as 'priority' anyway, so for example,
1880  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1881  */
1882 ConnectClass* userrec::GetClass(const std::string &explicit_name)
1883 {
1884         if (!explicit_name.empty())
1885         {
1886                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1887                 {
1888                         if (explicit_name == i->GetName())
1889                                 return &(*i);
1890                 }
1891         }
1892         else
1893         {
1894                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1895                 {
1896                         if (((match(this->GetIPString(),i->GetHost().c_str(),true)) || (match(this->host,i->GetHost().c_str()))))
1897                         {
1898                                 if (i->GetPort())
1899                                 {
1900                                         if (this->GetPort() == i->GetPort())
1901                                                 return &(*i);
1902                                         else
1903                                                 continue;
1904                                 }
1905                                 else
1906                                         return &(*i);
1907                         }
1908                 }
1909         }
1910         return NULL;
1911 }
1912
1913 void userrec::PurgeEmptyChannels()
1914 {
1915         std::vector<chanrec*> to_delete;
1916
1917         // firstly decrement the count on each channel
1918         for (UCListIter f = this->chans.begin(); f != this->chans.end(); f++)
1919         {
1920                 f->first->RemoveAllPrefixes(this);
1921                 if (f->first->DelUser(this) == 0)
1922                 {
1923                         /* No users left in here, mark it for deletion */
1924                         try
1925                         {
1926                                 to_delete.push_back(f->first);
1927                         }
1928                         catch (...)
1929                         {
1930                                 ServerInstance->Log(DEBUG,"Exception in userrec::PurgeEmptyChannels to_delete.push_back()");
1931                         }
1932                 }
1933         }
1934
1935         for (std::vector<chanrec*>::iterator n = to_delete.begin(); n != to_delete.end(); n++)
1936         {
1937                 chanrec* thischan = *n;
1938                 chan_hash::iterator i2 = ServerInstance->chanlist->find(thischan->name);
1939                 if (i2 != ServerInstance->chanlist->end())
1940                 {
1941                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(i2->second));
1942                         DELETE(i2->second);
1943                         ServerInstance->chanlist->erase(i2);
1944                         this->chans.erase(*n);
1945                 }
1946         }
1947
1948         this->UnOper();
1949 }
1950
1951 void userrec::ShowMOTD()
1952 {
1953         if (!ServerInstance->Config->MOTD.size())
1954         {
1955                 this->WriteServ("422 %s :Message of the day file is missing.",this->nick);
1956                 return;
1957         }
1958         this->WriteServ("375 %s :%s message of the day", this->nick, ServerInstance->Config->ServerName);
1959
1960         for (file_cache::iterator i = ServerInstance->Config->MOTD.begin(); i != ServerInstance->Config->MOTD.end(); i++)
1961                 this->WriteServ("372 %s :- %s",this->nick,i->c_str());
1962
1963         this->WriteServ("376 %s :End of message of the day.", this->nick);
1964 }
1965
1966 void userrec::ShowRULES()
1967 {
1968         if (!ServerInstance->Config->RULES.size())
1969         {
1970                 this->WriteServ("434 %s :RULES File is missing",this->nick);
1971                 return;
1972         }
1973
1974         this->WriteServ("308 %s :- %s Server Rules -",this->nick,ServerInstance->Config->ServerName);
1975
1976         for (file_cache::iterator i = ServerInstance->Config->RULES.begin(); i != ServerInstance->Config->RULES.end(); i++)
1977                 this->WriteServ("232 %s :- %s",this->nick,i->c_str());
1978
1979         this->WriteServ("309 %s :End of RULES command.",this->nick);
1980 }
1981
1982 void userrec::HandleEvent(EventType et, int errornum)
1983 {
1984         /* WARNING: May delete this user! */
1985         int thisfd = this->GetFd();
1986
1987         try
1988         {
1989                 switch (et)
1990                 {
1991                         case EVENT_READ:
1992                                 ServerInstance->ProcessUser(this);
1993                         break;
1994                         case EVENT_WRITE:
1995                                 this->FlushWriteBuf();
1996                         break;
1997                         case EVENT_ERROR:
1998                                 /** This should be safe, but dont DARE do anything after it -- Brain */
1999                                 this->SetWriteError(errornum ? strerror(errornum) : "EOF from client");
2000                         break;
2001                 }
2002         }
2003         catch (...)
2004         {
2005                 ServerInstance->Log(DEBUG,"Exception in userrec::HandleEvent intercepted");
2006         }
2007
2008         /* If the user has raised an error whilst being processed, quit them now we're safe to */
2009         if ((ServerInstance->SE->GetRef(thisfd) == this))
2010         {
2011                 if (!WriteError.empty())
2012                 {
2013                         userrec::QuitUser(ServerInstance, this, GetWriteError());
2014                 }
2015         }
2016 }
2017
2018 void userrec::SetOperQuit(const std::string &oquit)
2019 {
2020         if (operquit)
2021                 return;
2022
2023         operquit = strdup(oquit.c_str());
2024 }
2025
2026 const char* userrec::GetOperQuit()
2027 {
2028         return operquit ? operquit : "";
2029 }
2030
2031 VisData::VisData()
2032 {
2033 }
2034
2035 VisData::~VisData()
2036 {
2037 }
2038
2039 bool VisData::VisibleTo(userrec* user)
2040 {
2041         return true;
2042 }
2043