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