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