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
 349         if (uid.empty())
 350                 strlcpy(uuid, Instance->GetUID().c_str(), UUID_LENGTH);
 351         else
 352                 strlcpy(uuid, uid.c_str(), UUID_LENGTH);
 353
 354         ServerInstance->Log(DEBUG,"New UUID for user: %s (%s)", uuid, uid.empty() ? "allocated new" : "used remote");
 355
 356         user_hash::iterator finduuid = Instance->uuidlist->find(uuid);
 357         if (finduuid == Instance->uuidlist->end())
 358                 (*Instance->uuidlist)[uuid] = this;
 359         else
 360                 throw CoreException("Duplicate UUID "+std::string(uuid)+" in userrec constructor");
 361 }
 362
 363 void userrec::RemoveCloneCounts()
 364 {
 365         clonemap::iterator x = ServerInstance->local_clones.find(this->GetIPString());
 366         if (x != ServerInstance->local_clones.end())
 367         {
 368                 x->second--;
 369                 if (!x->second)
 370                 {
 371                         ServerInstance->local_clones.erase(x);
 372                 }
 373         }
 374
 375         clonemap::iterator y = ServerInstance->global_clones.find(this->GetIPString());
 376         if (y != ServerInstance->global_clones.end())
 377         {
 378                 y->second--;
 379                 if (!y->second)
 380                 {
 381                         ServerInstance->global_clones.erase(y);
 382                 }
 383         }
 384 }
 385
 386 userrec::~userrec()
 387 {
 388         this->InvalidateCache();
 389         this->DecrementModes();
 390         if (operquit)
 391                 free(operquit);
 392         if (ip)
 393         {
 394                 this->RemoveCloneCounts();
 395
 396                 if (this->GetProtocolFamily() == AF_INET)
 397                 {
 398                         delete (sockaddr_in*)ip;
 399                 }
 400 #ifdef SUPPORT_IP6LINKS
 401                 else
 402                 {
 403                         delete (sockaddr_in6*)ip;
 404                 }
 405 #endif
 406         }
 407
 408         ServerInstance->uuidlist->erase(uuid);
 409 }
 410
 411 char* userrec::MakeHost()
 412 {
 413         if (this->cached_makehost)
 414                 return this->cached_makehost;
 415
 416         char nhost[MAXBUF];
 417         /* This is much faster than snprintf */
 418         char* t = nhost;
 419         for(char* n = ident; *n; n++)
 420                 *t++ = *n;
 421         *t++ = '@';
 422         for(char* n = host; *n; n++)
 423                 *t++ = *n;
 424         *t = 0;
 425
 426         this->cached_makehost = strdup(nhost);
 427
 428         return this->cached_makehost;
 429 }
 430
 431 char* userrec::MakeHostIP()
 432 {
 433         if (this->cached_hostip)
 434                 return this->cached_hostip;
 435
 436         char ihost[MAXBUF];
 437         /* This is much faster than snprintf */
 438         char* t = ihost;
 439         for(char* n = ident; *n; n++)
 440                 *t++ = *n;
 441         *t++ = '@';
 442         for(const char* n = this->GetIPString(); *n; n++)
 443                 *t++ = *n;
 444         *t = 0;
 445
 446         this->cached_hostip = strdup(ihost);
 447
 448         return this->cached_hostip;
 449 }
 450
 451 void userrec::CloseSocket()
 452 {
 453         ServerInstance->SE->Shutdown(this, 2);
 454         ServerInstance->SE->Close(this);
 455 }
 456
 457 char* userrec::GetFullHost()
 458 {
 459         if (this->cached_fullhost)
 460                 return this->cached_fullhost;
 461
 462         char result[MAXBUF];
 463         char* t = result;
 464         for(char* n = nick; *n; n++)
 465                 *t++ = *n;
 466         *t++ = '!';
 467         for(char* n = ident; *n; n++)
 468                 *t++ = *n;
 469         *t++ = '@';
 470         for(char* n = dhost; *n; n++)
 471                 *t++ = *n;
 472         *t = 0;
 473
 474         this->cached_fullhost = strdup(result);
 475
 476         return this->cached_fullhost;
 477 }
 478
 479 char* userrec::MakeWildHost()
 480 {
 481         static char nresult[MAXBUF];
 482         char* t = nresult;
 483         *t++ = '*';     *t++ = '!';
 484         *t++ = '*';     *t++ = '@';
 485         for(char* n = dhost; *n; n++)
 486                 *t++ = *n;
 487         *t = 0;
 488         return nresult;
 489 }
 490
 491 int userrec::ReadData(void* buffer, size_t size)
 492 {
 493         if (IS_LOCAL(this))
 494         {
 495 #ifndef WIN32
 496                 return read(this->fd, buffer, size);
 497 #else
 498                 return recv(this->fd, (char*)buffer, size, 0);
 499 #endif
 500         }
 501         else
 502                 return 0;
 503 }
 504
 505
 506 char* userrec::GetFullRealHost()
 507 {
 508         if (this->cached_fullrealhost)
 509                 return this->cached_fullrealhost;
 510
 511         char fresult[MAXBUF];
 512         char* t = fresult;
 513         for(char* n = nick; *n; n++)
 514                 *t++ = *n;
 515         *t++ = '!';
 516         for(char* n = ident; *n; n++)
 517                 *t++ = *n;
 518         *t++ = '@';
 519         for(char* n = host; *n; n++)
 520                 *t++ = *n;
 521         *t = 0;
 522
 523         this->cached_fullrealhost = strdup(fresult);
 524
 525         return this->cached_fullrealhost;
 526 }
 527
 528 bool userrec::IsInvited(const irc::string &channel)
 529 {
 530         for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 531         {
 532                 if (channel == *i)
 533                 {
 534                         return true;
 535                 }
 536         }
 537         return false;
 538 }
 539
 540 InvitedList* userrec::GetInviteList()
 541 {
 542         return &invites;
 543 }
 544
 545 void userrec::InviteTo(const irc::string &channel)
 546 {
 547         invites.push_back(channel);
 548 }
 549
 550 void userrec::RemoveInvite(const irc::string &channel)
 551 {
 552         for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 553         {
 554                 if (channel == *i)
 555                 {
 556                         invites.erase(i);
 557                         return;
 558                 }
 559         }
 560 }
 561
 562 bool userrec::HasPermission(const std::string &command)
 563 {
 564         char* mycmd;
 565         char* savept;
 566         char* savept2;
 567
 568         /*
 569          * users on remote servers can completely bypass all permissions based checks.
 570          * This prevents desyncs when one server has different type/class tags to another.
 571          * That having been said, this does open things up to the possibility of source changes
 572          * allowing remote kills, etc - but if they have access to the src, they most likely have
 573          * access to the conf - so it's an end to a means either way.
 574          */
 575         if (!IS_LOCAL(this))
 576                 return true;
 577
 578         // are they even an oper at all?
 579         if (IS_OPER(this))
 580         {
 581                 opertype_t::iterator iter_opertype = ServerInstance->Config->opertypes.find(this->oper);
 582                 if (iter_opertype != ServerInstance->Config->opertypes.end())
 583                 {
 584                         char* Classes = strdup(iter_opertype->second);
 585                         char* myclass = strtok_r(Classes," ",&savept);
 586                         while (myclass)
 587                         {
 588                                 operclass_t::iterator iter_operclass = ServerInstance->Config->operclass.find(myclass);
 589                                 if (iter_operclass != ServerInstance->Config->operclass.end())
 590                                 {
 591                                         char* CommandList = strdup(iter_operclass->second);
 592                                         mycmd = strtok_r(CommandList," ",&savept2);
 593                                         while (mycmd)
 594                                         {
 595                                                 if ((!strcasecmp(mycmd,command.c_str())) || (*mycmd == '*'))
 596                                                 {
 597                                                         free(Classes);
 598                                                         free(CommandList);
 599                                                         return true;
 600                                                 }
 601                                                 mycmd = strtok_r(NULL," ",&savept2);
 602                                         }
 603                                         free(CommandList);
 604                                 }
 605                                 myclass = strtok_r(NULL," ",&savept);
 606                         }
 607                         free(Classes);
 608                 }
 609         }
 610         return false;
 611 }
 612
 613 /** NOTE: We cannot pass a const reference to this method.
 614  * The string is changed by the workings of the method,
 615  * so that if we pass const ref, we end up copying it to
 616  * something we can change anyway. Makes sense to just let
 617  * the compiler do that copy for us.
 618  */
 619 bool userrec::AddBuffer(std::string a)
 620 {
 621         try
 622         {
 623                 std::string::size_type i = a.rfind('\r');
 624
 625                 while (i != std::string::npos)
 626                 {
 627                         a.erase(i, 1);
 628                         i = a.rfind('\r');
 629                 }
 630
 631                 if (a.length())
 632                         recvq.append(a);
 633
 634                 if (recvq.length() > (unsigned)this->recvqmax)
 635                 {
 636                         this->SetWriteError("RecvQ exceeded");
 637                         ServerInstance->WriteOpers("*** User %s RecvQ of %d exceeds connect class maximum of %d",this->nick,recvq.length(),this->recvqmax);
 638                         return false;
 639                 }
 640
 641                 return true;
 642         }
 643
 644         catch (...)
 645         {
 646                 ServerInstance->Log(DEBUG,"Exception in userrec::AddBuffer()");
 647                 return false;
 648         }
 649 }
 650
 651 bool userrec::BufferIsReady()
 652 {
 653         return (recvq.find('\n') != std::string::npos);
 654 }
 655
 656 void userrec::ClearBuffer()
 657 {
 658         recvq.clear();
 659 }
 660
 661 std::string userrec::GetBuffer()
 662 {
 663         try
 664         {
 665                 if (!recvq.length())
 666                         return "";
 667
 668                 /* Strip any leading \r or \n off the string.
 669                  * Usually there are only one or two of these,
 670                  * so its is computationally cheap to do.
 671                  */
 672                 std::string::iterator t = recvq.begin();
 673                 while (t != recvq.end() && (*t == '\r' || *t == '\n'))
 674                 {
 675                         recvq.erase(t);
 676                         t = recvq.begin();
 677                 }
 678
 679                 for (std::string::iterator x = recvq.begin(); x != recvq.end(); x++)
 680                 {
 681                         /* Find the first complete line, return it as the
 682                          * result, and leave the recvq as whats left
 683                          */
 684                         if (*x == '\n')
 685                         {
 686                                 std::string ret = std::string(recvq.begin(), x);
 687                                 recvq.erase(recvq.begin(), x + 1);
 688                                 return ret;
 689                         }
 690                 }
 691                 return "";
 692         }
 693
 694         catch (...)
 695         {
 696                 ServerInstance->Log(DEBUG,"Exception in userrec::GetBuffer()");
 697                 return "";
 698         }
 699 }
 700
 701 void userrec::AddWriteBuf(const std::string &data)
 702 {
 703         if (*this->GetWriteError())
 704                 return;
 705
 706         if (sendq.length() + data.length() > (unsigned)this->sendqmax)
 707         {
 708                 /*
 709                  * Fix by brain - Set the error text BEFORE calling writeopers, because
 710                  * if we dont it'll recursively  call here over and over again trying
 711                  * to repeatedly add the text to the sendq!
 712                  */
 713                 this->SetWriteError("SendQ exceeded");
 714                 ServerInstance->WriteOpers("*** User %s SendQ of %d exceeds connect class maximum of %d",this->nick,sendq.length() + data.length(),this->sendqmax);
 715                 return;
 716         }
 717
 718         try
 719         {
 720                 if (data.length() > MAXBUF - 2) /* MAXBUF has a value of 514, to account for line terminators */
 721                         sendq.append(data.substr(0,MAXBUF - 4)).append("\r\n"); /* MAXBUF-4 = 510 */
 722                 else
 723                         sendq.append(data);
 724         }
 725         catch (...)
 726         {
 727                 this->SetWriteError("SendQ exceeded");
 728                 ServerInstance->WriteOpers("*** User %s SendQ got an exception",this->nick);
 729         }
 730 }
 731
 732 // send AS MUCH OF THE USERS SENDQ as we are able to (might not be all of it)
 733 void userrec::FlushWriteBuf()
 734 {
 735         try
 736         {
 737                 if ((this->fd == FD_MAGIC_NUMBER) || (*this->GetWriteError()))
 738                 {
 739                         sendq.clear();
 740                 }
 741                 if ((sendq.length()) && (this->fd != FD_MAGIC_NUMBER))
 742                 {
 743                         int old_sendq_length = sendq.length();
 744                         int n_sent = ServerInstance->SE->Send(this, this->sendq.data(), this->sendq.length(), 0);
 745
 746                         if (n_sent == -1)
 747                         {
 748                                 if (errno == EAGAIN)
 749                                 {
 750                                         /* The socket buffer is full. This isnt fatal,
 751                                          * try again later.
 752                                          */
 753                                         this->ServerInstance->SE->WantWrite(this);
 754                                 }
 755                                 else
 756                                 {
 757                                         /* Fatal error, set write error and bail
 758                                          */
 759                                         this->SetWriteError(errno ? strerror(errno) : "EOF from client");
 760                                         return;
 761                                 }
 762                         }
 763                         else
 764                         {
 765                                 /* advance the queue */
 766                                 if (n_sent)
 767                                         this->sendq = this->sendq.substr(n_sent);
 768                                 /* update the user's stats counters */
 769                                 this->bytes_out += n_sent;
 770                                 this->cmds_out++;
 771                                 if (n_sent != old_sendq_length)
 772                                         this->ServerInstance->SE->WantWrite(this);
 773                         }
 774                 }
 775         }
 776
 777         catch (...)
 778         {
 779                 ServerInstance->Log(DEBUG,"Exception in userrec::FlushWriteBuf()");
 780         }
 781
 782         if (this->sendq.empty())
 783         {
 784                 FOREACH_MOD(I_OnBufferFlushed,OnBufferFlushed(this));
 785         }
 786 }
 787
 788 void userrec::SetWriteError(const std::string &error)
 789 {
 790         try
 791         {
 792                 // don't try to set the error twice, its already set take the first string.
 793                 if (this->WriteError.empty())
 794                         this->WriteError = error;
 795         }
 796
 797         catch (...)
 798         {
 799                 ServerInstance->Log(DEBUG,"Exception in userrec::SetWriteError()");
 800         }
 801 }
 802
 803 const char* userrec::GetWriteError()
 804 {
 805         return this->WriteError.c_str();
 806 }
 807
 808 void userrec::Oper(const std::string &opertype)
 809 {
 810         try
 811         {
 812                 this->modes[UM_OPERATOR] = 1;
 813                 this->WriteServ("MODE %s :+o", this->nick);
 814                 FOREACH_MOD(I_OnOper, OnOper(this, opertype));
 815                 ServerInstance->Log(DEFAULT,"OPER: %s!%s@%s opered as type: %s", this->nick, this->ident, this->host, opertype.c_str());
 816                 strlcpy(this->oper, opertype.c_str(), NICKMAX - 1);
 817                 ServerInstance->all_opers.push_back(this);
 818                 FOREACH_MOD(I_OnPostOper,OnPostOper(this, opertype));
 819         }
 820
 821         catch (...)
 822         {
 823                 ServerInstance->Log(DEBUG,"Exception in userrec::Oper()");
 824         }
 825 }
 826
 827 void userrec::UnOper()
 828 {
 829         try
 830         {
 831                 if (IS_OPER(this))
 832                 {
 833                         // unset their oper type (what IS_OPER checks), and remove +o
 834                         *this->oper = 0;
 835                         this->modes[UM_OPERATOR] = 0;
 836
 837                         // remove them from the opers list.
 838                         for (std::vector<userrec*>::iterator a = ServerInstance->all_opers.begin(); a < ServerInstance->all_opers.end(); a++)
 839                         {
 840                                 if (*a == this)
 841                                 {
 842                                         ServerInstance->all_opers.erase(a);
 843                                         return;
 844                                 }
 845                         }
 846                 }
 847         }
 848
 849         catch (...)
 850         {
 851                 ServerInstance->Log(DEBUG,"Exception in userrec::UnOper()");
 852         }
 853 }
 854
 855 void userrec::QuitUser(InspIRCd* Instance, userrec *user, const std::string &quitreason, const char* operreason)
 856 {
 857         user->muted = true;
 858         Instance->GlobalCulls.AddItem(user, quitreason.c_str(), operreason);
 859 }
 860
 861 /* adds or updates an entry in the whowas list */
 862 void userrec::AddToWhoWas()
 863 {
 864         command_t* whowas_command = ServerInstance->Parser->GetHandler("WHOWAS");
 865         if (whowas_command)
 866         {
 867                 std::deque<classbase*> params;
 868                 params.push_back(this);
 869                 whowas_command->HandleInternal(WHOWAS_ADD, params);
 870         }
 871 }
 872
 873 /* add a client connection to the sockets list */
 874 void userrec::AddClient(InspIRCd* Instance, int socket, int port, bool iscached, int socketfamily, sockaddr* ip)
 875 {
 876         /* NOTE: Calling this one parameter constructor for userrec automatically
 877          * allocates a new UUID and places it in the hash_map.
 878          */
 879         userrec* New = new userrec(Instance);
 880         int j = 0;
 881
 882         Instance->unregistered_count++;
 883
 884         char ipaddr[MAXBUF];
 885 #ifdef IPV6
 886         if (socketfamily == AF_INET6)
 887                 inet_ntop(AF_INET6, &((const sockaddr_in6*)ip)->sin6_addr, ipaddr, sizeof(ipaddr));
 888         else
 889 #endif
 890         inet_ntop(AF_INET, &((const sockaddr_in*)ip)->sin_addr, ipaddr, sizeof(ipaddr));
 891
 892         (*(Instance->clientlist))[New->uuid] = New;
 893         New->SetFd(socket);
 894
 895         /* The users default nick is their UUID */
 896         strlcpy(New->nick, New->uuid, NICKMAX - 1);
 897
 898         New->server = Instance->FindServerNamePtr(Instance->Config->ServerName);
 899         /* We don't need range checking here, we KNOW 'unknown\0' will fit into the ident field. */
 900         strcpy(New->ident, "unknown");
 901
 902         New->registered = REG_NONE;
 903         New->signon = Instance->Time() + Instance->Config->dns_timeout;
 904         New->lastping = 1;
 905
 906         New->SetSockAddr(socketfamily, ipaddr, port);
 907
 908         /* Smarter than your average bear^H^H^H^Hset of strlcpys. */
 909         for (const char* temp = New->GetIPString(); *temp && j < 64; temp++, j++)
 910                 New->dhost[j] = New->host[j] = *temp;
 911         New->dhost[j] = New->host[j] = 0;
 912
 913         Instance->AddLocalClone(New);
 914         Instance->AddGlobalClone(New);
 915
 916         /*
 917          * First class check. We do this again in FullConnect after DNS is done, and NICK/USER is recieved.
 918          * See my note down there for why this is required. DO NOT REMOVE. :) -- w00t
 919          */
 920         ConnectClass* i = New->GetClass();
 921
 922         if (!i)
 923         {
 924                 userrec::QuitUser(Instance, New, "Access denied by configuration");
 925                 return;
 926         }
 927
 928         /*
 929          * Check connect class settings and initialise settings into userrec.
 930          * This will be done again after DNS resolution. -- w00t
 931          */
 932         New->CheckClass();
 933
 934         Instance->local_users.push_back(New);
 935
 936         if ((Instance->local_users.size() > Instance->Config->SoftLimit) || (Instance->local_users.size() >= MAXCLIENTS))
 937         {
 938                 Instance->WriteOpers("*** Warning: softlimit value has been reached: %d clients", Instance->Config->SoftLimit);
 939                 userrec::QuitUser(Instance, New,"No more connections allowed");
 940                 return;
 941         }
 942
 943         /*
 944          * XXX -
 945          * this is done as a safety check to keep the file descriptors within range of fd_ref_table.
 946          * its a pretty big but for the moment valid assumption:
 947          * file descriptors are handed out starting at 0, and are recycled as theyre freed.
 948          * therefore if there is ever an fd over 65535, 65536 clients must be connected to the
 949          * irc server at once (or the irc server otherwise initiating this many connections, files etc)
 950          * which for the time being is a physical impossibility (even the largest networks dont have more
 951          * than about 10,000 users on ONE server!)
 952          */
 953 #ifndef WINDOWS
 954         if ((unsigned int)socket >= MAX_DESCRIPTORS)
 955         {
 956                 userrec::QuitUser(Instance, New, "Server is full");
 957                 return;
 958         }
 959 #endif
 960
 961         New->exempt = (Instance->XLines->matches_exception(New) != NULL);
 962         if (!New->exempt)
 963         {
 964                 ZLine* r = Instance->XLines->matches_zline(ipaddr);
 965                 if (r)
 966                 {
 967                         char reason[MAXBUF];
 968                         if (*Instance->Config->MoronBanner)
 969                                 New->WriteServ("NOTICE %s :*** %s", New->nick, Instance->Config->MoronBanner);
 970                         snprintf(reason,MAXBUF,"Z-Lined: %s",r->reason);
 971                         userrec::QuitUser(Instance, New, reason);
 972                         return;
 973                 }
 974         }
 975
 976         if (socket > -1)
 977         {
 978                 if (!Instance->SE->AddFd(New))
 979                 {
 980                         userrec::QuitUser(Instance, New, "Internal error handling connection");
 981                         return;
 982                 }
 983         }
 984
 985         /* NOTE: even if dns lookups are *off*, we still need to display this.
 986          * BOPM and other stuff requires it.
 987          */
 988         New->WriteServ("NOTICE Auth :*** Looking up your hostname...");
 989 }
 990
 991 unsigned long userrec::GlobalCloneCount()
 992 {
 993         clonemap::iterator x = ServerInstance->global_clones.find(this->GetIPString());
 994         if (x != ServerInstance->global_clones.end())
 995                 return x->second;
 996         else
 997                 return 0;
 998 }
 999
1000 unsigned long userrec::LocalCloneCount()
1001 {
1002         clonemap::iterator x = ServerInstance->local_clones.find(this->GetIPString());
1003         if (x != ServerInstance->local_clones.end())
1004                 return x->second;
1005         else
1006                 return 0;
1007 }
1008
1009 /*
1010  * Check class restrictions
1011  */
1012 void userrec::CheckClass(const std::string &explicit_class)
1013 {
1014         ConnectClass* a = this->GetClass(explicit_class);
1015
1016         if ((!a) || (a->GetType() == CC_DENY))
1017         {
1018                 userrec::QuitUser(ServerInstance, this, "Unauthorised connection");
1019                 return;
1020         }
1021         else if ((a->GetMaxLocal()) && (this->LocalCloneCount() > a->GetMaxLocal()))
1022         {
1023                 userrec::QuitUser(ServerInstance, this, "No more connections allowed from your host via this connect class (local)");
1024                 ServerInstance->WriteOpers("*** WARNING: maximum LOCAL connections (%ld) exceeded for IP %s", a->GetMaxLocal(), this->GetIPString());
1025                 return;
1026         }
1027         else if ((a->GetMaxGlobal()) && (this->GlobalCloneCount() > a->GetMaxGlobal()))
1028         {
1029                 userrec::QuitUser(ServerInstance, this, "No more connections allowed from your host via this connect class (global)");
1030                 ServerInstance->WriteOpers("*** WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s", a->GetMaxGlobal(), this->GetIPString());
1031                 return;
1032         }
1033
1034         this->pingmax = a->GetPingTime();
1035         this->nping = ServerInstance->Time() + a->GetPingTime() + ServerInstance->Config->dns_timeout;
1036         this->timeout = ServerInstance->Time() + a->GetRegTimeout();
1037         this->flood = a->GetFlood();
1038         this->threshold = a->GetThreshold();
1039         this->sendqmax = a->GetSendqMax();
1040         this->recvqmax = a->GetRecvqMax();
1041         this->MaxChans = a->GetMaxChans();
1042 }
1043
1044 void userrec::FullConnect()
1045 {
1046         ServerInstance->stats->statsConnects++;
1047         this->idle_lastmsg = ServerInstance->Time();
1048
1049         /*
1050          * You may be thinking "wtf, we checked this in userrec::AddClient!" - and yes, we did, BUT.
1051          * At the time AddClient is called, we don't have a resolved host, by here we probably do - which
1052          * may put the user into a totally seperate class with different restrictions! so we *must* check again.
1053          * Don't remove this! -- w00t
1054          */
1055         this->CheckClass();
1056
1057         /* Check the password, if one is required by the user's connect class.
1058          * This CANNOT be in CheckClass(), because that is called prior to PASS as well!
1059          */
1060         if ((!this->GetClass()->GetPass().empty()) && (!this->haspassed))
1061         {
1062                 userrec::QuitUser(ServerInstance, this, "Invalid password");
1063                 return;
1064         }
1065
1066         if (!this->exempt)
1067         {
1068                 GLine* r = ServerInstance->XLines->matches_gline(this);
1069
1070                 if (r)
1071                 {
1072                         this->muted = true;
1073                         char reason[MAXBUF];
1074                         if (*ServerInstance->Config->MoronBanner)
1075                                 this->WriteServ("NOTICE %s :*** %s", this->nick, ServerInstance->Config->MoronBanner);
1076                         snprintf(reason,MAXBUF,"G-Lined: %s",r->reason);
1077                         userrec::QuitUser(ServerInstance, this, reason);
1078                         return;
1079                 }
1080
1081                 KLine* n = ServerInstance->XLines->matches_kline(this);
1082
1083                 if (n)
1084                 {
1085                         this->muted = true;
1086                         char reason[MAXBUF];
1087                         if (*ServerInstance->Config->MoronBanner)
1088                                 this->WriteServ("NOTICE %s :*** %s", this, ServerInstance->Config->MoronBanner);
1089                         snprintf(reason,MAXBUF,"K-Lined: %s",n->reason);
1090                         userrec::QuitUser(ServerInstance, this, reason);
1091                         return;
1092                 }
1093         }
1094
1095         this->WriteServ("NOTICE Auth :Welcome to \002%s\002!",ServerInstance->Config->Network);
1096         this->WriteServ("001 %s :Welcome to the %s IRC Network %s!%s@%s",this->nick, ServerInstance->Config->Network, this->nick, this->ident, this->host);
1097         this->WriteServ("002 %s :Your host is %s, running version %s",this->nick,ServerInstance->Config->ServerName,VERSION);
1098         this->WriteServ("003 %s :This server was created %s %s", this->nick, __TIME__, __DATE__);
1099         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());
1100
1101         ServerInstance->Config->Send005(this);
1102
1103         this->WriteServ("042 %s %s :your unique ID", this->nick, this->uuid);
1104
1105
1106         this->ShowMOTD();
1107
1108         /* Now registered */
1109         if (ServerInstance->unregistered_count)
1110                 ServerInstance->unregistered_count--;
1111
1112         /* Trigger LUSERS output, give modules a chance too */
1113         int MOD_RESULT = 0;
1114         FOREACH_RESULT(I_OnPreCommand, OnPreCommand("LUSERS", NULL, 0, this, true, "LUSERS"));
1115         if (!MOD_RESULT)
1116                 ServerInstance->CallCommandHandler("LUSERS", NULL, 0, this);
1117
1118         /*
1119          * fix 3 by brain, move registered = 7 below these so that spurious modes and host
1120          * changes dont go out onto the network and produce 'fake direction'.
1121          */
1122         FOREACH_MOD(I_OnUserConnect,OnUserConnect(this));
1123
1124         this->registered = REG_ALL;
1125
1126         FOREACH_MOD(I_OnPostConnect,OnPostConnect(this));
1127
1128         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);
1129 }
1130
1131 /** userrec::UpdateNick()
1132  * re-allocates a nick in the user_hash after they change nicknames,
1133  * returns a pointer to the new user as it may have moved
1134  */
1135 userrec* userrec::UpdateNickHash(const char* New)
1136 {
1137         try
1138         {
1139                 //user_hash::iterator newnick;
1140                 user_hash::iterator oldnick = ServerInstance->clientlist->find(this->nick);
1141
1142                 if (!strcasecmp(this->nick,New))
1143                         return oldnick->second;
1144
1145                 if (oldnick == ServerInstance->clientlist->end())
1146                         return NULL; /* doesnt exist */
1147
1148                 userrec* olduser = oldnick->second;
1149                 (*(ServerInstance->clientlist))[New] = olduser;
1150                 ServerInstance->clientlist->erase(oldnick);
1151                 return olduser;
1152         }
1153
1154         catch (...)
1155         {
1156                 ServerInstance->Log(DEBUG,"Exception in userrec::UpdateNickHash()");
1157                 return NULL;
1158         }
1159 }
1160
1161 void userrec::InvalidateCache()
1162 {
1163         /* Invalidate cache */
1164         if (cached_fullhost)
1165                 free(cached_fullhost);
1166         if (cached_hostip)
1167                 free(cached_hostip);
1168         if (cached_makehost)
1169                 free(cached_makehost);
1170         if (cached_fullrealhost)
1171                 free(cached_fullrealhost);
1172         cached_fullhost = cached_hostip = cached_makehost = cached_fullrealhost = NULL;
1173 }
1174
1175 bool userrec::ForceNickChange(const char* newnick)
1176 {
1177         try
1178         {
1179                 int MOD_RESULT = 0;
1180
1181                 this->InvalidateCache();
1182
1183                 FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(this, newnick));
1184
1185                 if (MOD_RESULT)
1186                 {
1187                         ServerInstance->stats->statsCollisions++;
1188                         return false;
1189                 }
1190
1191                 if (ServerInstance->XLines->matches_qline(newnick))
1192                 {
1193                         ServerInstance->stats->statsCollisions++;
1194                         return false;
1195                 }
1196
1197                 if (this->registered == REG_ALL)
1198                 {
1199                         std::deque<classbase*> dummy;
1200                         command_t* nickhandler = ServerInstance->Parser->GetHandler("NICK");
1201                         if (nickhandler)
1202                         {
1203                                 nickhandler->HandleInternal(1, dummy);
1204                                 bool result = (ServerInstance->Parser->CallHandler("NICK", &newnick, 1, this) == CMD_SUCCESS);
1205                                 nickhandler->HandleInternal(0, dummy);
1206                                 return result;
1207                         }
1208                 }
1209                 return false;
1210         }
1211
1212         catch (...)
1213         {
1214                 ServerInstance->Log(DEBUG,"Exception in userrec::ForceNickChange()");
1215                 return false;
1216         }
1217 }
1218
1219 void userrec::SetSockAddr(int protocol_family, const char* ip, int port)
1220 {
1221         switch (protocol_family)
1222         {
1223 #ifdef SUPPORT_IP6LINKS
1224                 case AF_INET6:
1225                 {
1226                         sockaddr_in6* sin = new sockaddr_in6;
1227                         sin->sin6_family = AF_INET6;
1228                         sin->sin6_port = port;
1229                         inet_pton(AF_INET6, ip, &sin->sin6_addr);
1230                         this->ip = (sockaddr*)sin;
1231                 }
1232                 break;
1233 #endif
1234                 case AF_INET:
1235                 {
1236                         sockaddr_in* sin = new sockaddr_in;
1237                         sin->sin_family = AF_INET;
1238                         sin->sin_port = port;
1239                         inet_pton(AF_INET, ip, &sin->sin_addr);
1240                         this->ip = (sockaddr*)sin;
1241                 }
1242                 break;
1243                 default:
1244                         ServerInstance->Log(DEBUG,"Ut oh, I dont know protocol %d to be set on '%s'!", protocol_family, this->nick);
1245                 break;
1246         }
1247 }
1248
1249 int userrec::GetPort()
1250 {
1251         if (this->ip == NULL)
1252                 return 0;
1253
1254         switch (this->GetProtocolFamily())
1255         {
1256 #ifdef SUPPORT_IP6LINKS
1257                 case AF_INET6:
1258                 {
1259                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1260                         return sin->sin6_port;
1261                 }
1262                 break;
1263 #endif
1264                 case AF_INET:
1265                 {
1266                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1267                         return sin->sin_port;
1268                 }
1269                 break;
1270                 default:
1271                 break;
1272         }
1273         return 0;
1274 }
1275
1276 int userrec::GetProtocolFamily()
1277 {
1278         if (this->ip == NULL)
1279                 return 0;
1280
1281         sockaddr_in* sin = (sockaddr_in*)this->ip;
1282         return sin->sin_family;
1283 }
1284
1285 const char* userrec::GetIPString()
1286 {
1287         static char buf[1024];
1288
1289         if (this->ip == NULL)
1290                 return "";
1291
1292         switch (this->GetProtocolFamily())
1293         {
1294 #ifdef SUPPORT_IP6LINKS
1295                 case AF_INET6:
1296                 {
1297                         static char temp[1024];
1298
1299                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1300                         inet_ntop(sin->sin6_family, &sin->sin6_addr, buf, sizeof(buf));
1301                         /* IP addresses starting with a : on irc are a Bad Thing (tm) */
1302                         if (*buf == ':')
1303                         {
1304                                 strlcpy(&temp[1], buf, sizeof(temp) - 1);
1305                                 *temp = '0';
1306                                 return temp;
1307                         }
1308                         return buf;
1309                 }
1310                 break;
1311 #endif
1312                 case AF_INET:
1313                 {
1314                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1315                         inet_ntop(sin->sin_family, &sin->sin_addr, buf, sizeof(buf));
1316                         return buf;
1317                 }
1318                 break;
1319                 default:
1320                 break;
1321         }
1322         return "";
1323 }
1324
1325 const char* userrec::GetIPString(char* buf)
1326 {
1327         if (this->ip == NULL)
1328         {
1329                 *buf = 0;
1330                 return buf;
1331         }
1332
1333         switch (this->GetProtocolFamily())
1334         {
1335 #ifdef SUPPORT_IP6LINKS
1336                 case AF_INET6:
1337                 {
1338                         static char temp[1024];
1339
1340                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1341                         inet_ntop(sin->sin6_family, &sin->sin6_addr, buf, sizeof(buf));
1342                         /* IP addresses starting with a : on irc are a Bad Thing (tm) */
1343                         if (*buf == ':')
1344                         {
1345                                 strlcpy(&temp[1], buf, sizeof(temp) - 1);
1346                                 *temp = '0';
1347                                 strlcpy(buf, temp, sizeof(temp));
1348                         }
1349                         return buf;
1350                 }
1351                 break;
1352 #endif
1353                 case AF_INET:
1354                 {
1355                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1356                         inet_ntop(sin->sin_family, &sin->sin_addr, buf, sizeof(buf));
1357                         return buf;
1358                 }
1359                 break;
1360
1361                 default:
1362                 break;
1363         }
1364         return "";
1365 }
1366
1367 /** NOTE: We cannot pass a const reference to this method.
1368  * The string is changed by the workings of the method,
1369  * so that if we pass const ref, we end up copying it to
1370  * something we can change anyway. Makes sense to just let
1371  * the compiler do that copy for us.
1372  */
1373 void userrec::Write(std::string text)
1374 {
1375         if (!ServerInstance->SE->BoundsCheckFd(this))
1376                 return;
1377
1378         try
1379         {
1380                 /* ServerInstance->Log(DEBUG,"C[%d] <- %s", this->GetFd(), text.c_str());
1381                  * WARNING: The above debug line is VERY loud, do NOT
1382                  * enable it till we have a good way of filtering it
1383                  * out of the logs (e.g. 1.2 would be good).
1384                  */
1385                 text.append("\r\n");
1386         }
1387         catch (...)
1388         {
1389                 ServerInstance->Log(DEBUG,"Exception in userrec::Write() std::string::append");
1390                 return;
1391         }
1392
1393         if (ServerInstance->Config->GetIOHook(this->GetPort()))
1394         {
1395                 try
1396                 {
1397                         /* XXX: The lack of buffering here is NOT a bug, modules implementing this interface have to
1398                          * implement their own buffering mechanisms
1399                          */
1400                         ServerInstance->Config->GetIOHook(this->GetPort())->OnRawSocketWrite(this->fd, text.data(), text.length());
1401                 }
1402                 catch (CoreException& modexcept)
1403                 {
1404                         ServerInstance->Log(DEBUG, "%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
1405                 }
1406         }
1407         else
1408         {
1409                 this->AddWriteBuf(text);
1410         }
1411         ServerInstance->stats->statsSent += text.length();
1412         this->ServerInstance->SE->WantWrite(this);
1413 }
1414
1415 /** Write()
1416  */
1417 void userrec::Write(const char *text, ...)
1418 {
1419         va_list argsPtr;
1420         char textbuffer[MAXBUF];
1421
1422         va_start(argsPtr, text);
1423         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1424         va_end(argsPtr);
1425
1426         this->Write(std::string(textbuffer));
1427 }
1428
1429 void userrec::WriteServ(const std::string& text)
1430 {
1431         char textbuffer[MAXBUF];
1432
1433         snprintf(textbuffer,MAXBUF,":%s %s",ServerInstance->Config->ServerName,text.c_str());
1434         this->Write(std::string(textbuffer));
1435 }
1436
1437 /** WriteServ()
1438  *  Same as Write(), except `text' is prefixed with `:server.name '.
1439  */
1440 void userrec::WriteServ(const char* text, ...)
1441 {
1442         va_list argsPtr;
1443         char textbuffer[MAXBUF];
1444
1445         va_start(argsPtr, text);
1446         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1447         va_end(argsPtr);
1448
1449         this->WriteServ(std::string(textbuffer));
1450 }
1451
1452
1453 void userrec::WriteFrom(userrec *user, const std::string &text)
1454 {
1455         char tb[MAXBUF];
1456
1457         snprintf(tb,MAXBUF,":%s %s",user->GetFullHost(),text.c_str());
1458
1459         this->Write(std::string(tb));
1460 }
1461
1462
1463 /* write text from an originating user to originating user */
1464
1465 void userrec::WriteFrom(userrec *user, const char* text, ...)
1466 {
1467         va_list argsPtr;
1468         char textbuffer[MAXBUF];
1469
1470         va_start(argsPtr, text);
1471         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1472         va_end(argsPtr);
1473
1474         this->WriteFrom(user, std::string(textbuffer));
1475 }
1476
1477
1478 /* write text to an destination user from a source user (e.g. user privmsg) */
1479
1480 void userrec::WriteTo(userrec *dest, const char *data, ...)
1481 {
1482         char textbuffer[MAXBUF];
1483         va_list argsPtr;
1484
1485         va_start(argsPtr, data);
1486         vsnprintf(textbuffer, MAXBUF, data, argsPtr);
1487         va_end(argsPtr);
1488
1489         this->WriteTo(dest, std::string(textbuffer));
1490 }
1491
1492 void userrec::WriteTo(userrec *dest, const std::string &data)
1493 {
1494         dest->WriteFrom(this, data);
1495 }
1496
1497
1498 void userrec::WriteCommon(const char* text, ...)
1499 {
1500         char textbuffer[MAXBUF];
1501         va_list argsPtr;
1502
1503         if (this->registered != REG_ALL)
1504                 return;
1505
1506         va_start(argsPtr, text);
1507         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1508         va_end(argsPtr);
1509
1510         this->WriteCommon(std::string(textbuffer));
1511 }
1512
1513 void userrec::WriteCommon(const std::string &text)
1514 {
1515         try
1516         {
1517                 bool sent_to_at_least_one = false;
1518                 char tb[MAXBUF];
1519
1520                 if (this->registered != REG_ALL)
1521                         return;
1522
1523                 uniq_id++;
1524
1525                 /* We dont want to be doing this n times, just once */
1526                 snprintf(tb,MAXBUF,":%s %s",this->GetFullHost(),text.c_str());
1527                 std::string out = tb;
1528
1529                 for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1530                 {
1531                         CUList* ulist = v->first->GetUsers();
1532                         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1533                         {
1534                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1535                                 {
1536                                         already_sent[i->first->fd] = uniq_id;
1537                                         i->first->Write(out);
1538                                         sent_to_at_least_one = true;
1539                                 }
1540                         }
1541                 }
1542
1543                 /*
1544                  * if the user was not in any channels, no users will receive the text. Make sure the user
1545                  * receives their OWN message for WriteCommon
1546                  */
1547                 if (!sent_to_at_least_one)
1548                 {
1549                         this->Write(std::string(tb));
1550                 }
1551         }
1552
1553         catch (...)
1554         {
1555                 ServerInstance->Log(DEBUG,"Exception in userrec::WriteCommon()");
1556         }
1557 }
1558
1559
1560 /* write a formatted string to all users who share at least one common
1561  * channel, NOT including the source user e.g. for use in QUIT
1562  */
1563
1564 void userrec::WriteCommonExcept(const char* text, ...)
1565 {
1566         char textbuffer[MAXBUF];
1567         va_list argsPtr;
1568
1569         va_start(argsPtr, text);
1570         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1571         va_end(argsPtr);
1572
1573         this->WriteCommonExcept(std::string(textbuffer));
1574 }
1575
1576 void userrec::WriteCommonQuit(const std::string &normal_text, const std::string &oper_text)
1577 {
1578         char tb1[MAXBUF];
1579         char tb2[MAXBUF];
1580
1581         if (this->registered != REG_ALL)
1582                 return;
1583
1584         uniq_id++;
1585         snprintf(tb1,MAXBUF,":%s QUIT :%s",this->GetFullHost(),normal_text.c_str());
1586         snprintf(tb2,MAXBUF,":%s QUIT :%s",this->GetFullHost(),oper_text.c_str());
1587         std::string out1 = tb1;
1588         std::string out2 = tb2;
1589
1590         for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1591         {
1592                 CUList *ulist = v->first->GetUsers();
1593                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1594                 {
1595                         if (this != i->first)
1596                         {
1597                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1598                                 {
1599                                         already_sent[i->first->fd] = uniq_id;
1600                                         i->first->Write(IS_OPER(i->first) ? out2 : out1);
1601                                 }
1602                         }
1603                 }
1604         }
1605 }
1606
1607 void userrec::WriteCommonExcept(const std::string &text)
1608 {
1609         char tb1[MAXBUF];
1610         std::string out1;
1611
1612         if (this->registered != REG_ALL)
1613                 return;
1614
1615         uniq_id++;
1616         snprintf(tb1,MAXBUF,":%s %s",this->GetFullHost(),text.c_str());
1617         out1 = tb1;
1618
1619         for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1620         {
1621                 CUList *ulist = v->first->GetUsers();
1622                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1623                 {
1624                         if (this != i->first)
1625                         {
1626                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1627                                 {
1628                                         already_sent[i->first->fd] = uniq_id;
1629                                         i->first->Write(out1);
1630                                 }
1631                         }
1632                 }
1633         }
1634
1635 }
1636
1637 void userrec::WriteWallOps(const std::string &text)
1638 {
1639         if (!IS_OPER(this) && IS_LOCAL(this))
1640                 return;
1641
1642         std::string wallop("WALLOPS :");
1643         wallop.append(text);
1644
1645         for (std::vector<userrec*>::const_iterator i = ServerInstance->local_users.begin(); i != ServerInstance->local_users.end(); i++)
1646         {
1647                 userrec* t = *i;
1648                 if (t->IsModeSet('w'))
1649                         this->WriteTo(t,wallop);
1650         }
1651 }
1652
1653 void userrec::WriteWallOps(const char* text, ...)
1654 {
1655         char textbuffer[MAXBUF];
1656         va_list argsPtr;
1657
1658         va_start(argsPtr, text);
1659         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1660         va_end(argsPtr);
1661
1662         this->WriteWallOps(std::string(textbuffer));
1663 }
1664
1665 /* return 0 or 1 depending if users u and u2 share one or more common channels
1666  * (used by QUIT, NICK etc which arent channel specific notices)
1667  *
1668  * The old algorithm in 1.0 for this was relatively inefficient, iterating over
1669  * the first users channels then the second users channels within the outer loop,
1670  * therefore it was a maximum of x*y iterations (upon returning 0 and checking
1671  * all possible iterations). However this new function instead checks against the
1672  * channel's userlist in the inner loop which is a std::map<userrec*,userrec*>
1673  * and saves us time as we already know what pointer value we are after.
1674  * Don't quote me on the maths as i am not a mathematician or computer scientist,
1675  * but i believe this algorithm is now x+(log y) maximum iterations instead.
1676  */
1677 bool userrec::SharesChannelWith(userrec *other)
1678 {
1679         if ((!other) || (this->registered != REG_ALL) || (other->registered != REG_ALL))
1680                 return false;
1681
1682         /* Outer loop */
1683         for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1684         {
1685                 /* Eliminate the inner loop (which used to be ~equal in size to the outer loop)
1686                  * by replacing it with a map::find which *should* be more efficient
1687                  */
1688                 if (i->first->HasUser(other))
1689                         return true;
1690         }
1691         return false;
1692 }
1693
1694 bool userrec::ChangeName(const char* gecos)
1695 {
1696         if (!strcmp(gecos, this->fullname))
1697                 return true;
1698
1699         if (IS_LOCAL(this))
1700         {
1701                 int MOD_RESULT = 0;
1702                 FOREACH_RESULT(I_OnChangeLocalUserGECOS,OnChangeLocalUserGECOS(this,gecos));
1703                 if (MOD_RESULT)
1704                         return false;
1705                 FOREACH_MOD(I_OnChangeName,OnChangeName(this,gecos));
1706         }
1707         strlcpy(this->fullname,gecos,MAXGECOS+1);
1708
1709         return true;
1710 }
1711
1712 bool userrec::ChangeDisplayedHost(const char* host)
1713 {
1714         if (!strcmp(host, this->dhost))
1715                 return true;
1716
1717         if (IS_LOCAL(this))
1718         {
1719                 int MOD_RESULT = 0;
1720                 FOREACH_RESULT(I_OnChangeLocalUserHost,OnChangeLocalUserHost(this,host));
1721                 if (MOD_RESULT)
1722                         return false;
1723                 FOREACH_MOD(I_OnChangeHost,OnChangeHost(this,host));
1724         }
1725         if (this->ServerInstance->Config->CycleHosts)
1726                 this->WriteCommonExcept("QUIT :Changing hosts");
1727
1728         /* Fix by Om: userrec::dhost is 65 long, this was truncating some long hosts */
1729         strlcpy(this->dhost,host,64);
1730
1731         this->InvalidateCache();
1732
1733         if (this->ServerInstance->Config->CycleHosts)
1734         {
1735                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1736                 {
1737                         i->first->WriteAllExceptSender(this, false, 0, "JOIN %s", i->first->name);
1738                         std::string n = this->ServerInstance->Modes->ModeString(this, i->first);
1739                         if (n.length() > 0)
1740                                 i->first->WriteAllExceptSender(this, true, 0, "MODE %s +%s", i->first->name, n.c_str());
1741                 }
1742         }
1743
1744         if (IS_LOCAL(this))
1745                 this->WriteServ("396 %s %s :is now your displayed host",this->nick,this->dhost);
1746
1747         return true;
1748 }
1749
1750 bool userrec::ChangeIdent(const char* newident)
1751 {
1752         if (!strcmp(newident, this->ident))
1753                 return true;
1754
1755         if (this->ServerInstance->Config->CycleHosts)
1756                 this->WriteCommonExcept("%s","QUIT :Changing ident");
1757
1758         strlcpy(this->ident, newident, IDENTMAX+2);
1759
1760         this->InvalidateCache();
1761
1762         if (this->ServerInstance->Config->CycleHosts)
1763         {
1764                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1765                 {
1766                         i->first->WriteAllExceptSender(this, false, 0, "JOIN %s", i->first->name);
1767                         std::string n = this->ServerInstance->Modes->ModeString(this, i->first);
1768                         if (n.length() > 0)
1769                                 i->first->WriteAllExceptSender(this, true, 0, "MODE %s +%s", i->first->name, n.c_str());
1770                 }
1771         }
1772
1773         return true;
1774 }
1775
1776 void userrec::SendAll(const char* command, char* text, ...)
1777 {
1778         char textbuffer[MAXBUF];
1779         char formatbuffer[MAXBUF];
1780         va_list argsPtr;
1781
1782         va_start(argsPtr, text);
1783         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1784         va_end(argsPtr);
1785
1786         snprintf(formatbuffer,MAXBUF,":%s %s $* :%s", this->GetFullHost(), command, textbuffer);
1787         std::string fmt = formatbuffer;
1788
1789         for (std::vector<userrec*>::const_iterator i = ServerInstance->local_users.begin(); i != ServerInstance->local_users.end(); i++)
1790         {
1791                 (*i)->Write(fmt);
1792         }
1793 }
1794
1795
1796 std::string userrec::ChannelList(userrec* source)
1797 {
1798         try
1799         {
1800                 std::string list;
1801                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1802                 {
1803                         /* If the target is the same as the sender, let them see all their channels.
1804                          * If the channel is NOT private/secret OR the user shares a common channel
1805                          * If the user is an oper, and the <options:operspywhois> option is set.
1806                          */
1807                         if ((source == this) || (IS_OPER(source) && ServerInstance->Config->OperSpyWhois) || (((!i->first->IsModeSet('p')) && (!i->first->IsModeSet('s'))) || (i->first->HasUser(source))))
1808                         {
1809                                 list.append(i->first->GetPrefixChar(this)).append(i->first->name).append(" ");
1810                         }
1811                 }
1812                 return list;
1813         }
1814         catch (...)
1815         {
1816                 ServerInstance->Log(DEBUG,"Exception in userrec::ChannelList()");
1817                 return "";
1818         }
1819 }
1820
1821 void userrec::SplitChanList(userrec* dest, const std::string &cl)
1822 {
1823         std::string line;
1824         std::ostringstream prefix;
1825         std::string::size_type start, pos, length;
1826
1827         try
1828         {
1829                 prefix << this->nick << " " << dest->nick << " :";
1830                 line = prefix.str();
1831                 int namelen = strlen(ServerInstance->Config->ServerName) + 6;
1832
1833                 for (start = 0; (pos = cl.find(' ', start)) != std::string::npos; start = pos+1)
1834                 {
1835                         length = (pos == std::string::npos) ? cl.length() : pos;
1836
1837                         if (line.length() + namelen + length - start > 510)
1838                         {
1839                                 ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1840                                 line = prefix.str();
1841                         }
1842
1843                         if(pos == std::string::npos)
1844                         {
1845                                 line.append(cl.substr(start, length - start));
1846                                 break;
1847                         }
1848                         else
1849                         {
1850                                 line.append(cl.substr(start, length - start + 1));
1851                         }
1852                 }
1853
1854                 if (line.length())
1855                 {
1856                         ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1857                 }
1858         }
1859
1860         catch (...)
1861         {
1862                 ServerInstance->Log(DEBUG,"Exception in userrec::SplitChanList()");
1863         }
1864 }
1865
1866 unsigned int userrec::GetMaxChans()
1867 {
1868         return this->MaxChans;
1869 }
1870
1871 /* looks up a users password for their connection class (<ALLOW>/<DENY> tags)
1872  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1873  * then their ip will be taken as 'priority' anyway, so for example,
1874  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1875  */
1876 ConnectClass* userrec::GetClass(const std::string &explicit_name)
1877 {
1878         if (!explicit_name.empty())
1879         {
1880                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1881                 {
1882                         if (explicit_name == i->GetName())
1883                                 return &(*i);
1884                 }
1885         }
1886         else
1887         {
1888                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1889                 {
1890                         if (((match(this->GetIPString(),i->GetHost().c_str(),true)) || (match(this->host,i->GetHost().c_str()))))
1891                         {
1892                                 if (i->GetPort())
1893                                 {
1894                                         if (this->GetPort() == i->GetPort())
1895                                                 return &(*i);
1896                                         else
1897                                                 continue;
1898                                 }
1899                                 else
1900                                         return &(*i);
1901                         }
1902                 }
1903         }
1904         return NULL;
1905 }
1906
1907 void userrec::PurgeEmptyChannels()
1908 {
1909         std::vector<chanrec*> to_delete;
1910
1911         // firstly decrement the count on each channel
1912         for (UCListIter f = this->chans.begin(); f != this->chans.end(); f++)
1913         {
1914                 f->first->RemoveAllPrefixes(this);
1915                 if (f->first->DelUser(this) == 0)
1916                 {
1917                         /* No users left in here, mark it for deletion */
1918                         try
1919                         {
1920                                 to_delete.push_back(f->first);
1921                         }
1922                         catch (...)
1923                         {
1924                                 ServerInstance->Log(DEBUG,"Exception in userrec::PurgeEmptyChannels to_delete.push_back()");
1925                         }
1926                 }
1927         }
1928
1929         for (std::vector<chanrec*>::iterator n = to_delete.begin(); n != to_delete.end(); n++)
1930         {
1931                 chanrec* thischan = *n;
1932                 chan_hash::iterator i2 = ServerInstance->chanlist->find(thischan->name);
1933                 if (i2 != ServerInstance->chanlist->end())
1934                 {
1935                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(i2->second));
1936                         DELETE(i2->second);
1937                         ServerInstance->chanlist->erase(i2);
1938                         this->chans.erase(*n);
1939                 }
1940         }
1941
1942         this->UnOper();
1943 }
1944
1945 void userrec::ShowMOTD()
1946 {
1947         if (!ServerInstance->Config->MOTD.size())
1948         {
1949                 this->WriteServ("422 %s :Message of the day file is missing.",this->nick);
1950                 return;
1951         }
1952         this->WriteServ("375 %s :%s message of the day", this->nick, ServerInstance->Config->ServerName);
1953
1954         for (file_cache::iterator i = ServerInstance->Config->MOTD.begin(); i != ServerInstance->Config->MOTD.end(); i++)
1955                 this->WriteServ("372 %s :- %s",this->nick,i->c_str());
1956
1957         this->WriteServ("376 %s :End of message of the day.", this->nick);
1958 }
1959
1960 void userrec::ShowRULES()
1961 {
1962         if (!ServerInstance->Config->RULES.size())
1963         {
1964                 this->WriteServ("434 %s :RULES File is missing",this->nick);
1965                 return;
1966         }
1967
1968         this->WriteServ("308 %s :- %s Server Rules -",this->nick,ServerInstance->Config->ServerName);
1969
1970         for (file_cache::iterator i = ServerInstance->Config->RULES.begin(); i != ServerInstance->Config->RULES.end(); i++)
1971                 this->WriteServ("232 %s :- %s",this->nick,i->c_str());
1972
1973         this->WriteServ("309 %s :End of RULES command.",this->nick);
1974 }
1975
1976 void userrec::HandleEvent(EventType et, int errornum)
1977 {
1978         /* WARNING: May delete this user! */
1979         int thisfd = this->GetFd();
1980
1981         try
1982         {
1983                 switch (et)
1984                 {
1985                         case EVENT_READ:
1986                                 ServerInstance->ProcessUser(this);
1987                         break;
1988                         case EVENT_WRITE:
1989                                 this->FlushWriteBuf();
1990                         break;
1991                         case EVENT_ERROR:
1992                                 /** This should be safe, but dont DARE do anything after it -- Brain */
1993                                 this->SetWriteError(errornum ? strerror(errornum) : "EOF from client");
1994                         break;
1995                 }
1996         }
1997         catch (...)
1998         {
1999                 ServerInstance->Log(DEBUG,"Exception in userrec::HandleEvent intercepted");
2000         }
2001
2002         /* If the user has raised an error whilst being processed, quit them now we're safe to */
2003         if ((ServerInstance->SE->GetRef(thisfd) == this))
2004         {
2005                 if (!WriteError.empty())
2006                 {
2007                         userrec::QuitUser(ServerInstance, this, GetWriteError());
2008                 }
2009         }
2010 }
2011
2012 void userrec::SetOperQuit(const std::string &oquit)
2013 {
2014         if (operquit)
2015                 return;
2016
2017         operquit = strdup(oquit.c_str());
2018 }
2019
2020 const char* userrec::GetOperQuit()
2021 {
2022         return operquit ? operquit : "";
2023 }
2024
2025 VisData::VisData()
2026 {
2027 }
2028
2029 VisData::~VisData()
2030 {
2031 }
2032
2033 bool VisData::VisibleTo(userrec* user)
2034 {
2035         return true;
2036 }
2037