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