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)
 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                                         /* IPV4 lookup (mixed protocol mode) */
 187 #endif
 188                                 /* IPV4 lookup (ipv4 only mode) */
 189                                 bound_user->res_forward = new UserResolver(this->ServerInstance, this->bound_user, result, DNS_QUERY_A, cached);
 190                                 this->ServerInstance->AddResolver(bound_user->res_forward, cached);
 191                         }
 192                 }
 193                 catch (CoreException& e)
 194                 {
 195                         ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
 196                 }
 197         }
 198         else if ((this->fwd) && (ServerInstance->SE->GetRef(this->bound_fd) == this->bound_user))
 199         {
 200                 /* Both lookups completed */
 201                 std::string result2 = "0::ffff:";
 202                 result2.append(result);
 203                 if (this->bound_user->GetIPString() == result || this->bound_user->GetIPString() == result2)
 204                 {
 205                         std::string hostname = this->bound_user->stored_host;
 206                         if (hostname.length() < 65)
 207                         {
 208                                 /* Check we didnt time out */
 209                                 if ((this->bound_user->registered != REG_ALL) && (!this->bound_user->dns_done))
 210                                 {
 211                                         /* Hostnames starting with : are not a good thing (tm) */
 212                                         if (*(hostname.c_str()) == ':')
 213                                                 hostname = "0" + hostname;
 214
 215                                         this->bound_user->WriteServ("NOTICE Auth :*** Found your hostname (%s)%s", hostname.c_str(), (cached ? " -- cached" : ""));
 216                                         this->bound_user->dns_done = true;
 217                                         strlcpy(this->bound_user->dhost, hostname.c_str(),64);
 218                                         strlcpy(this->bound_user->host, hostname.c_str(),64);
 219                                         /* Invalidate cache */
 220                                         this->bound_user->InvalidateCache();
 221                                 }
 222                         }
 223                         else
 224                         {
 225                                 if (!this->bound_user->dns_done)
 226                                 {
 227                                         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());
 228                                         this->bound_user->dns_done = true;
 229                                 }
 230                         }
 231                 }
 232                 else
 233                 {
 234                         if (!this->bound_user->dns_done)
 235                         {
 236                                 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());
 237                                 this->bound_user->dns_done = true;
 238                         }
 239                 }
 240         }
 241 }
 242
 243 void UserResolver::OnError(ResolverError e, const std::string &errormessage)
 244 {
 245         if (ServerInstance->SE->GetRef(this->bound_fd) == this->bound_user)
 246         {
 247                 /* Since dns timeout is implemented outside of the resolver, this was a race condition that could result in this message being sent *after*
 248                  * the user was fully connected. This check fixes that issue  - Special */
 249                 if (!this->bound_user->dns_done)
 250                 {
 251                         /* Error message here */
 252                         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());
 253                         this->bound_user->dns_done = true;
 254                 }
 255         }
 256 }
 257
 258
 259 bool userrec::IsNoticeMaskSet(unsigned char sm)
 260 {
 261         return (snomasks[sm-65]);
 262 }
 263
 264 void userrec::SetNoticeMask(unsigned char sm, bool value)
 265 {
 266         snomasks[sm-65] = value;
 267 }
 268
 269 const char* userrec::FormatNoticeMasks()
 270 {
 271         static char data[MAXBUF];
 272         int offset = 0;
 273
 274         for (int n = 0; n < 64; n++)
 275         {
 276                 if (snomasks[n])
 277                         data[offset++] = n+65;
 278         }
 279
 280         data[offset] = 0;
 281         return data;
 282 }
 283
 284
 285
 286 bool userrec::IsModeSet(unsigned char m)
 287 {
 288         return (modes[m-65]);
 289 }
 290
 291 void userrec::SetMode(unsigned char m, bool value)
 292 {
 293         modes[m-65] = value;
 294 }
 295
 296 const char* userrec::FormatModes()
 297 {
 298         static char data[MAXBUF];
 299         int offset = 0;
 300         for (int n = 0; n < 64; n++)
 301         {
 302                 if (modes[n])
 303                         data[offset++] = n+65;
 304         }
 305         data[offset] = 0;
 306         return data;
 307 }
 308
 309 void userrec::DecrementModes()
 310 {
 311         for (int n = 0; n < 64; n++)
 312         {
 313                 if (modes[n])
 314                 {
 315                         ModeHandler* mh = ServerInstance->Modes->FindMode(n+65, MODETYPE_USER);
 316                         if (mh)
 317                                 mh->ChangeCount(-1);
 318                 }
 319         }
 320 }
 321
 322 userrec::userrec(InspIRCd* Instance) : ServerInstance(Instance)
 323 {
 324         // the PROPER way to do it, AVOID bzero at *ALL* costs
 325         *password = *nick = *ident = *host = *dhost = *fullname = *awaymsg = *oper = 0;
 326         server = (char*)Instance->FindServerNamePtr(Instance->Config->ServerName);
 327         reset_due = ServerInstance->Time();
 328         age = ServerInstance->Time(true);
 329         lines_in = lastping = signon = idle_lastmsg = nping = registered = 0;
 330         ChannelCount = timeout = flood = bytes_in = bytes_out = cmds_in = cmds_out = 0;
 331         muted = exempt = haspassed = dns_done = false;
 332         fd = -1;
 333         recvq = "";
 334         sendq = "";
 335         WriteError = "";
 336         res_forward = res_reverse = NULL;
 337         Visibility = NULL;
 338         ip = NULL;
 339         chans.clear();
 340         invites.clear();
 341         memset(modes,0,sizeof(modes));
 342         memset(snomasks,0,sizeof(snomasks));
 343         /* Invalidate cache */
 344         operquit = cached_fullhost = cached_hostip = cached_makehost = cached_fullrealhost = NULL;
 345 }
 346
 347 userrec::~userrec()
 348 {
 349         this->InvalidateCache();
 350         this->DecrementModes();
 351         if (operquit)
 352                 free(operquit);
 353         if (ip)
 354         {
 355                 clonemap::iterator x = ServerInstance->local_clones.find(this->GetIPString());
 356                 if (x != ServerInstance->local_clones.end())
 357                 {
 358                         x->second--;
 359                         if (!x->second)
 360                         {
 361                                 ServerInstance->local_clones.erase(x);
 362                         }
 363                 }
 364
 365                 clonemap::iterator y = ServerInstance->global_clones.find(this->GetIPString());
 366                 if (y != ServerInstance->global_clones.end())
 367                 {
 368                         y->second--;
 369                         if (!y->second)
 370                         {
 371                                 ServerInstance->global_clones.erase(y);
 372                         }
 373                 }
 374
 375                 if (this->GetProtocolFamily() == AF_INET)
 376                 {
 377                         delete (sockaddr_in*)ip;
 378                 }
 379 #ifdef SUPPORT_IP6LINKS
 380                 else
 381                 {
 382                         delete (sockaddr_in6*)ip;
 383                 }
 384 #endif
 385         }
 386 }
 387
 388 char* userrec::MakeHost()
 389 {
 390         if (this->cached_makehost)
 391                 return this->cached_makehost;
 392
 393         char nhost[MAXBUF];
 394         /* This is much faster than snprintf */
 395         char* t = nhost;
 396         for(char* n = ident; *n; n++)
 397                 *t++ = *n;
 398         *t++ = '@';
 399         for(char* n = host; *n; n++)
 400                 *t++ = *n;
 401         *t = 0;
 402
 403         this->cached_makehost = strdup(nhost);
 404
 405         return this->cached_makehost;
 406 }
 407
 408 char* userrec::MakeHostIP()
 409 {
 410         if (this->cached_hostip)
 411                 return this->cached_hostip;
 412
 413         char ihost[MAXBUF];
 414         /* This is much faster than snprintf */
 415         char* t = ihost;
 416         for(char* n = ident; *n; n++)
 417                 *t++ = *n;
 418         *t++ = '@';
 419         for(const char* n = this->GetIPString(); *n; n++)
 420                 *t++ = *n;
 421         *t = 0;
 422
 423         this->cached_hostip = strdup(ihost);
 424
 425         return this->cached_hostip;
 426 }
 427
 428 void userrec::CloseSocket()
 429 {
 430         shutdown(this->fd,2);
 431         close(this->fd);
 432 }
 433
 434 char* userrec::GetFullHost()
 435 {
 436         if (this->cached_fullhost)
 437                 return this->cached_fullhost;
 438
 439         char result[MAXBUF];
 440         char* t = result;
 441         for(char* n = nick; *n; n++)
 442                 *t++ = *n;
 443         *t++ = '!';
 444         for(char* n = ident; *n; n++)
 445                 *t++ = *n;
 446         *t++ = '@';
 447         for(char* n = dhost; *n; n++)
 448                 *t++ = *n;
 449         *t = 0;
 450
 451         this->cached_fullhost = strdup(result);
 452
 453         return this->cached_fullhost;
 454 }
 455
 456 char* userrec::MakeWildHost()
 457 {
 458         static char nresult[MAXBUF];
 459         char* t = nresult;
 460         *t++ = '*';     *t++ = '!';
 461         *t++ = '*';     *t++ = '@';
 462         for(char* n = dhost; *n; n++)
 463                 *t++ = *n;
 464         *t = 0;
 465         return nresult;
 466 }
 467
 468 int userrec::ReadData(void* buffer, size_t size)
 469 {
 470         if (IS_LOCAL(this))
 471         {
 472 #ifndef WIN32
 473                 return read(this->fd, buffer, size);
 474 #else
 475                 return recv(this->fd, (char*)buffer, size, 0);
 476 #endif
 477         }
 478         else
 479                 return 0;
 480 }
 481
 482
 483 char* userrec::GetFullRealHost()
 484 {
 485         if (this->cached_fullrealhost)
 486                 return this->cached_fullrealhost;
 487
 488         char fresult[MAXBUF];
 489         char* t = fresult;
 490         for(char* n = nick; *n; n++)
 491                 *t++ = *n;
 492         *t++ = '!';
 493         for(char* n = ident; *n; n++)
 494                 *t++ = *n;
 495         *t++ = '@';
 496         for(char* n = host; *n; n++)
 497                 *t++ = *n;
 498         *t = 0;
 499
 500         this->cached_fullrealhost = strdup(fresult);
 501
 502         return this->cached_fullrealhost;
 503 }
 504
 505 bool userrec::IsInvited(const irc::string &channel)
 506 {
 507         for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 508         {
 509                 if (channel == *i)
 510                 {
 511                         return true;
 512                 }
 513         }
 514         return false;
 515 }
 516
 517 InvitedList* userrec::GetInviteList()
 518 {
 519         return &invites;
 520 }
 521
 522 void userrec::InviteTo(const irc::string &channel)
 523 {
 524         invites.push_back(channel);
 525 }
 526
 527 void userrec::RemoveInvite(const irc::string &channel)
 528 {
 529         for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 530         {
 531                 if (channel == *i)
 532                 {
 533                         invites.erase(i);
 534                         return;
 535                 }
 536         }
 537 }
 538
 539 bool userrec::HasPermission(const std::string &command)
 540 {
 541         char* mycmd;
 542         char* savept;
 543         char* savept2;
 544
 545         /*
 546          * users on remote servers can completely bypass all permissions based checks.
 547          * This prevents desyncs when one server has different type/class tags to another.
 548          * That having been said, this does open things up to the possibility of source changes
 549          * allowing remote kills, etc - but if they have access to the src, they most likely have
 550          * access to the conf - so it's an end to a means either way.
 551          */
 552         if (!IS_LOCAL(this))
 553                 return true;
 554
 555         // are they even an oper at all?
 556         if (IS_OPER(this))
 557         {
 558                 opertype_t::iterator iter_opertype = ServerInstance->Config->opertypes.find(this->oper);
 559                 if (iter_opertype != ServerInstance->Config->opertypes.end())
 560                 {
 561                         char* Classes = strdup(iter_opertype->second);
 562                         char* myclass = strtok_r(Classes," ",&savept);
 563                         while (myclass)
 564                         {
 565                                 operclass_t::iterator iter_operclass = ServerInstance->Config->operclass.find(myclass);
 566                                 if (iter_operclass != ServerInstance->Config->operclass.end())
 567                                 {
 568                                         char* CommandList = strdup(iter_operclass->second);
 569                                         mycmd = strtok_r(CommandList," ",&savept2);
 570                                         while (mycmd)
 571                                         {
 572                                                 if ((!strcasecmp(mycmd,command.c_str())) || (*mycmd == '*'))
 573                                                 {
 574                                                         free(Classes);
 575                                                         free(CommandList);
 576                                                         return true;
 577                                                 }
 578                                                 mycmd = strtok_r(NULL," ",&savept2);
 579                                         }
 580                                         free(CommandList);
 581                                 }
 582                                 myclass = strtok_r(NULL," ",&savept);
 583                         }
 584                         free(Classes);
 585                 }
 586         }
 587         return false;
 588 }
 589
 590 /** NOTE: We cannot pass a const reference to this method.
 591  * The string is changed by the workings of the method,
 592  * so that if we pass const ref, we end up copying it to
 593  * something we can change anyway. Makes sense to just let
 594  * the compiler do that copy for us.
 595  */
 596 bool userrec::AddBuffer(std::string a)
 597 {
 598         try
 599         {
 600                 std::string::size_type i = a.rfind('\r');
 601
 602                 while (i != std::string::npos)
 603                 {
 604                         a.erase(i, 1);
 605                         i = a.rfind('\r');
 606                 }
 607
 608                 if (a.length())
 609                         recvq.append(a);
 610
 611                 if (recvq.length() > (unsigned)this->recvqmax)
 612                 {
 613                         this->SetWriteError("RecvQ exceeded");
 614                         ServerInstance->WriteOpers("*** User %s RecvQ of %d exceeds connect class maximum of %d",this->nick,recvq.length(),this->recvqmax);
 615                         return false;
 616                 }
 617
 618                 return true;
 619         }
 620
 621         catch (...)
 622         {
 623                 ServerInstance->Log(DEBUG,"Exception in userrec::AddBuffer()");
 624                 return false;
 625         }
 626 }
 627
 628 bool userrec::BufferIsReady()
 629 {
 630         return (recvq.find('\n') != std::string::npos);
 631 }
 632
 633 void userrec::ClearBuffer()
 634 {
 635         recvq = "";
 636 }
 637
 638 std::string userrec::GetBuffer()
 639 {
 640         try
 641         {
 642                 if (!recvq.length())
 643                         return "";
 644
 645                 /* Strip any leading \r or \n off the string.
 646                  * Usually there are only one or two of these,
 647                  * so its is computationally cheap to do.
 648                  */
 649                 std::string::iterator t = recvq.begin();
 650                 while (t != recvq.end() && (*t == '\r' || *t == '\n'))
 651                 {
 652                         recvq.erase(t);
 653                         t = recvq.begin();
 654                 }
 655
 656                 for (std::string::iterator x = recvq.begin(); x != recvq.end(); x++)
 657                 {
 658                         /* Find the first complete line, return it as the
 659                          * result, and leave the recvq as whats left
 660                          */
 661                         if (*x == '\n')
 662                         {
 663                                 std::string ret = std::string(recvq.begin(), x);
 664                                 recvq.erase(recvq.begin(), x + 1);
 665                                 return ret;
 666                         }
 667                 }
 668                 return "";
 669         }
 670
 671         catch (...)
 672         {
 673                 ServerInstance->Log(DEBUG,"Exception in userrec::GetBuffer()");
 674                 return "";
 675         }
 676 }
 677
 678 void userrec::AddWriteBuf(const std::string &data)
 679 {
 680         if (*this->GetWriteError())
 681                 return;
 682
 683         if (sendq.length() + data.length() > (unsigned)this->sendqmax)
 684         {
 685                 /*
 686                  * Fix by brain - Set the error text BEFORE calling writeopers, because
 687                  * if we dont it'll recursively  call here over and over again trying
 688                  * to repeatedly add the text to the sendq!
 689                  */
 690                 this->SetWriteError("SendQ exceeded");
 691                 ServerInstance->WriteOpers("*** User %s SendQ of %d exceeds connect class maximum of %d",this->nick,sendq.length() + data.length(),this->sendqmax);
 692                 return;
 693         }
 694
 695         try
 696         {
 697                 if (data.length() > MAXBUF - 2) /* MAXBUF has a value of 514, to account for line terminators */
 698                         sendq.append(data.substr(0,MAXBUF - 4)).append("\r\n"); /* MAXBUF-4 = 510 */
 699                 else
 700                         sendq.append(data);
 701         }
 702         catch (...)
 703         {
 704                 this->SetWriteError("SendQ exceeded");
 705                 ServerInstance->WriteOpers("*** User %s SendQ got an exception",this->nick);
 706         }
 707 }
 708
 709 // send AS MUCH OF THE USERS SENDQ as we are able to (might not be all of it)
 710 void userrec::FlushWriteBuf()
 711 {
 712         try
 713         {
 714                 if ((this->fd == FD_MAGIC_NUMBER) || (*this->GetWriteError()))
 715                 {
 716                         sendq = "";
 717                 }
 718                 if ((sendq.length()) && (this->fd != FD_MAGIC_NUMBER))
 719                 {
 720                         int old_sendq_length = sendq.length();
 721 #ifndef WIN32
 722                 int n_sent = write(this->fd, this->sendq.data(), this->sendq.length());
 723 #else
 724                 int n_sent = send(this->fd, (const char*)this->sendq.data(), this->sendq.length(), 0);
 725 #endif
 726                         if (n_sent == -1)
 727                         {
 728                                 if (errno == EAGAIN)
 729                                 {
 730                                         /* The socket buffer is full. This isnt fatal,
 731                                          * try again later.
 732                                          */
 733                                         this->ServerInstance->SE->WantWrite(this);
 734                                 }
 735                                 else
 736                                 {
 737                                         /* Fatal error, set write error and bail
 738                                          */
 739                                         this->SetWriteError(strerror(errno));
 740                                         return;
 741                                 }
 742                         }
 743                         else
 744                         {
 745                                 /* advance the queue */
 746                                 if (n_sent)
 747                                         this->sendq = this->sendq.substr(n_sent);
 748                                 /* update the user's stats counters */
 749                                 this->bytes_out += n_sent;
 750                                 this->cmds_out++;
 751                                 if (n_sent != old_sendq_length)
 752                                         this->ServerInstance->SE->WantWrite(this);
 753                         }
 754                 }
 755         }
 756
 757         catch (...)
 758         {
 759                 ServerInstance->Log(DEBUG,"Exception in userrec::FlushWriteBuf()");
 760         }
 761
 762         if (this->sendq.empty())
 763         {
 764                 FOREACH_MOD(I_OnBufferFlushed,OnBufferFlushed(this));
 765         }
 766 }
 767
 768 void userrec::SetWriteError(const std::string &error)
 769 {
 770         try
 771         {
 772                 // don't try to set the error twice, its already set take the first string.
 773                 if (this->WriteError.empty())
 774                         this->WriteError = error;
 775         }
 776
 777         catch (...)
 778         {
 779                 ServerInstance->Log(DEBUG,"Exception in userrec::SetWriteError()");
 780         }
 781 }
 782
 783 const char* userrec::GetWriteError()
 784 {
 785         return this->WriteError.c_str();
 786 }
 787
 788 void userrec::Oper(const std::string &opertype)
 789 {
 790         try
 791         {
 792                 this->modes[UM_OPERATOR] = 1;
 793                 this->WriteServ("MODE %s :+o", this->nick);
 794                 FOREACH_MOD(I_OnOper, OnOper(this, opertype));
 795                 ServerInstance->Log(DEFAULT,"OPER: %s!%s@%s opered as type: %s", this->nick, this->ident, this->host, opertype.c_str());
 796                 strlcpy(this->oper, opertype.c_str(), NICKMAX - 1);
 797                 ServerInstance->all_opers.push_back(this);
 798                 FOREACH_MOD(I_OnPostOper,OnPostOper(this, opertype));
 799         }
 800
 801         catch (...)
 802         {
 803                 ServerInstance->Log(DEBUG,"Exception in userrec::Oper()");
 804         }
 805 }
 806
 807 void userrec::UnOper()
 808 {
 809         try
 810         {
 811                 if (IS_OPER(this))
 812                 {
 813                         // unset their oper type (what IS_OPER checks), and remove +o
 814                         *this->oper = 0;
 815                         this->modes[UM_OPERATOR] = 0;
 816
 817                         // remove them from the opers list.
 818                         for (std::vector<userrec*>::iterator a = ServerInstance->all_opers.begin(); a < ServerInstance->all_opers.end(); a++)
 819                         {
 820                                 if (*a == this)
 821                                 {
 822                                         ServerInstance->all_opers.erase(a);
 823                                         return;
 824                                 }
 825                         }
 826                 }
 827         }
 828
 829         catch (...)
 830         {
 831                 ServerInstance->Log(DEBUG,"Exception in userrec::UnOper()");
 832         }
 833 }
 834
 835 void userrec::QuitUser(InspIRCd* Instance, userrec *user, const std::string &quitreason, const char* operreason)
 836 {
 837         user->muted = true;
 838         Instance->GlobalCulls.AddItem(user, quitreason.c_str(), operreason);
 839 }
 840
 841 /* adds or updates an entry in the whowas list */
 842 void userrec::AddToWhoWas()
 843 {
 844         command_t* whowas_command = ServerInstance->Parser->GetHandler("WHOWAS");
 845         if (whowas_command)
 846         {
 847                 std::deque<classbase*> params;
 848                 params.push_back(this);
 849                 whowas_command->HandleInternal(WHOWAS_ADD, params);
 850         }
 851 }
 852
 853 /* add a client connection to the sockets list */
 854 void userrec::AddClient(InspIRCd* Instance, int socket, int port, bool iscached, int socketfamily, sockaddr* ip)
 855 {
 856         std::string tempnick = ConvToStr(socket) + "-unknown";
 857         user_hash::iterator iter = Instance->clientlist->find(tempnick);
 858         char ipaddr[MAXBUF];
 859 #ifdef IPV6
 860         if (socketfamily == AF_INET6)
 861                 inet_ntop(AF_INET6, &((const sockaddr_in6*)ip)->sin6_addr, ipaddr, sizeof(ipaddr));
 862         else
 863 #endif
 864         inet_ntop(AF_INET, &((const sockaddr_in*)ip)->sin_addr, ipaddr, sizeof(ipaddr));
 865         userrec* New;
 866         int j = 0;
 867
 868         Instance->unregistered_count++;
 869
 870         /*
 871          * fix by brain.
 872          * as these nicknames are 'RFC impossible', we can be sure nobody is going to be
 873          * using one as a registered connection. As they are per fd, we can also safely assume
 874          * that we wont have collisions. Therefore, if the nick exists in the list, its only
 875          * used by a dead socket, erase the iterator so that the new client may reclaim it.
 876          * this was probably the cause of 'server ignores me when i hammer it with reconnects'
 877          * issue in earlier alphas/betas
 878          */
 879         if (iter != Instance->clientlist->end())
 880         {
 881                 userrec* goner = iter->second;
 882                 DELETE(goner);
 883                 Instance->clientlist->erase(iter);
 884         }
 885
 886         New = new userrec(Instance);
 887         (*(Instance->clientlist))[tempnick] = New;
 888         New->fd = socket;
 889         strlcpy(New->nick,tempnick.c_str(),NICKMAX-1);
 890
 891         New->server = Instance->FindServerNamePtr(Instance->Config->ServerName);
 892         /* We don't need range checking here, we KNOW 'unknown\0' will fit into the ident field. */
 893         strcpy(New->ident, "unknown");
 894
 895         New->registered = REG_NONE;
 896         New->signon = Instance->Time() + Instance->Config->dns_timeout;
 897         New->lastping = 1;
 898
 899         New->SetSockAddr(socketfamily, ipaddr, port);
 900
 901         /* Smarter than your average bear^H^H^H^Hset of strlcpys. */
 902         for (const char* temp = New->GetIPString(); *temp && j < 64; temp++, j++)
 903                 New->dhost[j] = New->host[j] = *temp;
 904         New->dhost[j] = New->host[j] = 0;
 905
 906         Instance->AddLocalClone(New);
 907         Instance->AddGlobalClone(New);
 908
 909         /*
 910          * First class check. We do this again in FullConnect after DNS is done, and NICK/USER is recieved.
 911          * See my note down there for why this is required. DO NOT REMOVE. :) -- w00t
 912          */
 913         ConnectClass* i = New->GetClass();
 914
 915         if (!i)
 916         {
 917                 userrec::QuitUser(Instance, New, "Access denied by configuration");
 918                 return;
 919         }
 920
 921         New->CheckClass();
 922
 923         New->pingmax = i->GetPingTime();
 924         New->nping = Instance->Time() + i->GetPingTime() + Instance->Config->dns_timeout;
 925         New->timeout = Instance->Time() + i->GetRegTimeout();
 926         New->flood = i->GetFlood();
 927         New->threshold = i->GetThreshold();
 928         New->sendqmax = i->GetSendqMax();
 929         New->recvqmax = i->GetRecvqMax();
 930
 931         Instance->local_users.push_back(New);
 932
 933         if ((Instance->local_users.size() > Instance->Config->SoftLimit) || (Instance->local_users.size() >= MAXCLIENTS))
 934         {
 935                 Instance->WriteOpers("*** Warning: softlimit value has been reached: %d clients", Instance->Config->SoftLimit);
 936                 userrec::QuitUser(Instance, New,"No more connections allowed");
 937                 return;
 938         }
 939
 940         /*
 941          * XXX -
 942          * this is done as a safety check to keep the file descriptors within range of fd_ref_table.
 943          * its a pretty big but for the moment valid assumption:
 944          * file descriptors are handed out starting at 0, and are recycled as theyre freed.
 945          * therefore if there is ever an fd over 65535, 65536 clients must be connected to the
 946          * irc server at once (or the irc server otherwise initiating this many connections, files etc)
 947          * which for the time being is a physical impossibility (even the largest networks dont have more
 948          * than about 10,000 users on ONE server!)
 949          */
 950 #ifndef WINDOWS
 951         if ((unsigned int)socket >= MAX_DESCRIPTORS)
 952         {
 953                 userrec::QuitUser(Instance, New, "Server is full");
 954                 return;
 955         }
 956 #endif
 957
 958         New->exempt = (Instance->XLines->matches_exception(New) != NULL);
 959         if (!New->exempt)
 960         {
 961                 ZLine* r = Instance->XLines->matches_zline(ipaddr);
 962                 if (r)
 963                 {
 964                         char reason[MAXBUF];
 965                         snprintf(reason,MAXBUF,"Z-Lined: %s",r->reason);
 966                         userrec::QuitUser(Instance, New, reason);
 967                         return;
 968                 }
 969         }
 970
 971         if (socket > -1)
 972         {
 973                 if (!Instance->SE->AddFd(New))
 974                 {
 975                         userrec::QuitUser(Instance, New, "Internal error handling connection");
 976                         return;
 977                 }
 978         }
 979
 980         /* NOTE: even if dns lookups are *off*, we still need to display this.
 981          * BOPM and other stuff requires it.
 982          */
 983         New->WriteServ("NOTICE Auth :*** Looking up your hostname...");
 984 }
 985
 986 unsigned long userrec::GlobalCloneCount()
 987 {
 988         clonemap::iterator x = ServerInstance->global_clones.find(this->GetIPString());
 989         if (x != ServerInstance->global_clones.end())
 990                 return x->second;
 991         else
 992                 return 0;
 993 }
 994
 995 unsigned long userrec::LocalCloneCount()
 996 {
 997         clonemap::iterator x = ServerInstance->local_clones.find(this->GetIPString());
 998         if (x != ServerInstance->local_clones.end())
 999                 return x->second;
1000         else
1001                 return 0;
1002 }
1003
1004 /*
1005  * Check class restrictions
1006  */
1007 void userrec::CheckClass()
1008 {
1009         ConnectClass* a = this->GetClass();
1010
1011         if ((!a) || (a->GetType() == CC_DENY))
1012         {
1013                 userrec::QuitUser(ServerInstance, this, "Unauthorised connection");
1014                 return;
1015         }
1016
1017         if ((!a->GetPass().empty()) && (!this->haspassed))
1018         {
1019                 userrec::QuitUser(ServerInstance, this, "Invalid password");
1020                 return;
1021         }
1022
1023         if ((!a) || (a->GetType() == CC_DENY))
1024         {
1025                 userrec::QuitUser(ServerInstance, this,"Unauthorised connection");
1026                 return;
1027         }
1028
1029         if ((a->GetMaxLocal()) && (this->LocalCloneCount() > a->GetMaxLocal()))
1030         {
1031                 userrec::QuitUser(ServerInstance, this, "No more connections allowed from your host via this connect class (local)");
1032                 ServerInstance->WriteOpers("*** WARNING: maximum LOCAL connections (%ld) exceeded for IP %s", a->GetMaxLocal(), this->GetIPString());
1033                 return;
1034         }
1035         else if ((a->GetMaxGlobal()) && (this->GlobalCloneCount() > a->GetMaxGlobal()))
1036         {
1037                 userrec::QuitUser(ServerInstance, this, "No more connections allowed from your host via this connect class (global)");
1038                 ServerInstance->WriteOpers("*** WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s", a->GetMaxGlobal(), this->GetIPString());
1039                 return;
1040         }
1041 }
1042
1043 void userrec::FullConnect()
1044 {
1045         ServerInstance->stats->statsConnects++;
1046         this->idle_lastmsg = ServerInstance->Time();
1047
1048         /*
1049          * You may be thinking "wtf, we checked this in userrec::AddClient!" - and yes, we did, BUT.
1050          * At the time AddClient is called, we don't have a resolved host, by here we probably do - which
1051          * may put the user into a totally seperate class with different restrictions! so we *must* check again.
1052          * Don't remove this! -- w00t
1053          */
1054         this->CheckClass();
1055
1056         if (!this->exempt)
1057         {
1058                 GLine* r = ServerInstance->XLines->matches_gline(this);
1059
1060                 if (r)
1061                 {
1062                         this->muted = true;
1063                         char reason[MAXBUF];
1064                         snprintf(reason,MAXBUF,"G-Lined: %s",r->reason);
1065                         ServerInstance->GlobalCulls.AddItem(this, reason);
1066                         return;
1067                 }
1068
1069                 KLine* n = ServerInstance->XLines->matches_kline(this);
1070
1071                 if (n)
1072                 {
1073                         this->muted = true;
1074                         char reason[MAXBUF];
1075                         snprintf(reason,MAXBUF,"K-Lined: %s",n->reason);
1076                         ServerInstance->GlobalCulls.AddItem(this, reason);
1077                         return;
1078                 }
1079
1080         }
1081
1082         this->WriteServ("NOTICE Auth :Welcome to \002%s\002!",ServerInstance->Config->Network);
1083         this->WriteServ("001 %s :Welcome to the %s IRC Network %s!%s@%s",this->nick, ServerInstance->Config->Network, this->nick, this->ident, this->host);
1084         this->WriteServ("002 %s :Your host is %s, running version %s",this->nick,ServerInstance->Config->ServerName,VERSION);
1085         this->WriteServ("003 %s :This server was created %s %s", this->nick, __TIME__, __DATE__);
1086         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());
1087
1088         ServerInstance->Config->Send005(this);
1089
1090         this->ShowMOTD();
1091
1092         /* Now registered */
1093         if (ServerInstance->unregistered_count)
1094                 ServerInstance->unregistered_count--;
1095
1096         /* Trigger LUSERS output, give modules a chance too */
1097         int MOD_RESULT = 0;
1098         FOREACH_RESULT(I_OnPreCommand, OnPreCommand("LUSERS", NULL, 0, this, true, "LUSERS"));
1099         if (!MOD_RESULT)
1100                 ServerInstance->CallCommandHandler("LUSERS", NULL, 0, this);
1101
1102         /*
1103          * fix 3 by brain, move registered = 7 below these so that spurious modes and host
1104          * changes dont go out onto the network and produce 'fake direction'.
1105          */
1106         FOREACH_MOD(I_OnUserConnect,OnUserConnect(this));
1107
1108         this->registered = REG_ALL;
1109
1110         FOREACH_MOD(I_OnPostConnect,OnPostConnect(this));
1111
1112         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);
1113 }
1114
1115 /** userrec::UpdateNick()
1116  * re-allocates a nick in the user_hash after they change nicknames,
1117  * returns a pointer to the new user as it may have moved
1118  */
1119 userrec* userrec::UpdateNickHash(const char* New)
1120 {
1121         try
1122         {
1123                 //user_hash::iterator newnick;
1124                 user_hash::iterator oldnick = ServerInstance->clientlist->find(this->nick);
1125
1126                 if (!strcasecmp(this->nick,New))
1127                         return oldnick->second;
1128
1129                 if (oldnick == ServerInstance->clientlist->end())
1130                         return NULL; /* doesnt exist */
1131
1132                 userrec* olduser = oldnick->second;
1133                 (*(ServerInstance->clientlist))[New] = olduser;
1134                 ServerInstance->clientlist->erase(oldnick);
1135                 return olduser;
1136         }
1137
1138         catch (...)
1139         {
1140                 ServerInstance->Log(DEBUG,"Exception in userrec::UpdateNickHash()");
1141                 return NULL;
1142         }
1143 }
1144
1145 void userrec::InvalidateCache()
1146 {
1147         /* Invalidate cache */
1148         if (cached_fullhost)
1149                 free(cached_fullhost);
1150         if (cached_hostip)
1151                 free(cached_hostip);
1152         if (cached_makehost)
1153                 free(cached_makehost);
1154         if (cached_fullrealhost)
1155                 free(cached_fullrealhost);
1156         cached_fullhost = cached_hostip = cached_makehost = cached_fullrealhost = NULL;
1157 }
1158
1159 bool userrec::ForceNickChange(const char* newnick)
1160 {
1161         try
1162         {
1163                 int MOD_RESULT = 0;
1164
1165                 this->InvalidateCache();
1166
1167                 FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(this, newnick));
1168
1169                 if (MOD_RESULT)
1170                 {
1171                         ServerInstance->stats->statsCollisions++;
1172                         return false;
1173                 }
1174
1175                 if (ServerInstance->XLines->matches_qline(newnick))
1176                 {
1177                         ServerInstance->stats->statsCollisions++;
1178                         return false;
1179                 }
1180
1181                 if (this->registered == REG_ALL)
1182                 {
1183                         const char* pars[1];
1184                         pars[0] = newnick;
1185                         std::string cmd = "NICK";
1186                         return (ServerInstance->Parser->CallHandler(cmd, pars, 1, this) == CMD_SUCCESS);
1187                 }
1188                 return false;
1189         }
1190
1191         catch (...)
1192         {
1193                 ServerInstance->Log(DEBUG,"Exception in userrec::ForceNickChange()");
1194                 return false;
1195         }
1196 }
1197
1198 void userrec::SetSockAddr(int protocol_family, const char* ip, int port)
1199 {
1200         switch (protocol_family)
1201         {
1202 #ifdef SUPPORT_IP6LINKS
1203                 case AF_INET6:
1204                 {
1205                         sockaddr_in6* sin = new sockaddr_in6;
1206                         sin->sin6_family = AF_INET6;
1207                         sin->sin6_port = port;
1208                         inet_pton(AF_INET6, ip, &sin->sin6_addr);
1209                         this->ip = (sockaddr*)sin;
1210                 }
1211                 break;
1212 #endif
1213                 case AF_INET:
1214                 {
1215                         sockaddr_in* sin = new sockaddr_in;
1216                         sin->sin_family = AF_INET;
1217                         sin->sin_port = port;
1218                         inet_pton(AF_INET, ip, &sin->sin_addr);
1219                         this->ip = (sockaddr*)sin;
1220                 }
1221                 break;
1222                 default:
1223                         ServerInstance->Log(DEBUG,"Ut oh, I dont know protocol %d to be set on '%s'!", protocol_family, this->nick);
1224                 break;
1225         }
1226 }
1227
1228 int userrec::GetPort()
1229 {
1230         if (this->ip == NULL)
1231                 return 0;
1232
1233         switch (this->GetProtocolFamily())
1234         {
1235 #ifdef SUPPORT_IP6LINKS
1236                 case AF_INET6:
1237                 {
1238                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1239                         return sin->sin6_port;
1240                 }
1241                 break;
1242 #endif
1243                 case AF_INET:
1244                 {
1245                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1246                         return sin->sin_port;
1247                 }
1248                 break;
1249                 default:
1250                 break;
1251         }
1252         return 0;
1253 }
1254
1255 int userrec::GetProtocolFamily()
1256 {
1257         if (this->ip == NULL)
1258                 return 0;
1259
1260         sockaddr_in* sin = (sockaddr_in*)this->ip;
1261         return sin->sin_family;
1262 }
1263
1264 const char* userrec::GetIPString()
1265 {
1266         static char buf[1024];
1267
1268         if (this->ip == NULL)
1269                 return "";
1270
1271         switch (this->GetProtocolFamily())
1272         {
1273 #ifdef SUPPORT_IP6LINKS
1274                 case AF_INET6:
1275                 {
1276                         static char temp[1024];
1277
1278                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1279                         inet_ntop(sin->sin6_family, &sin->sin6_addr, buf, sizeof(buf));
1280                         /* IP addresses starting with a : on irc are a Bad Thing (tm) */
1281                         if (*buf == ':')
1282                         {
1283                                 strlcpy(&temp[1], buf, sizeof(temp) - 1);
1284                                 *temp = '0';
1285                                 return temp;
1286                         }
1287                         return buf;
1288                 }
1289                 break;
1290 #endif
1291                 case AF_INET:
1292                 {
1293                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1294                         inet_ntop(sin->sin_family, &sin->sin_addr, buf, sizeof(buf));
1295                         return buf;
1296                 }
1297                 break;
1298                 default:
1299                 break;
1300         }
1301         return "";
1302 }
1303
1304 const char* userrec::GetIPString(char* buf)
1305 {
1306         if (this->ip == NULL)
1307         {
1308                 *buf = 0;
1309                 return buf;
1310         }
1311
1312         switch (this->GetProtocolFamily())
1313         {
1314 #ifdef SUPPORT_IP6LINKS
1315                 case AF_INET6:
1316                 {
1317                         static char temp[1024];
1318
1319                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1320                         inet_ntop(sin->sin6_family, &sin->sin6_addr, buf, sizeof(buf));
1321                         /* IP addresses starting with a : on irc are a Bad Thing (tm) */
1322                         if (*buf == ':')
1323                         {
1324                                 strlcpy(&temp[1], buf, sizeof(temp) - 1);
1325                                 *temp = '0';
1326                                 strlcpy(buf, temp, sizeof(temp));
1327                         }
1328                         return buf;
1329                 }
1330                 break;
1331 #endif
1332                 case AF_INET:
1333                 {
1334                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1335                         inet_ntop(sin->sin_family, &sin->sin_addr, buf, sizeof(buf));
1336                         return buf;
1337                 }
1338                 break;
1339
1340                 default:
1341                 break;
1342         }
1343         return "";
1344 }
1345
1346 /** NOTE: We cannot pass a const reference to this method.
1347  * The string is changed by the workings of the method,
1348  * so that if we pass const ref, we end up copying it to
1349  * something we can change anyway. Makes sense to just let
1350  * the compiler do that copy for us.
1351  */
1352 void userrec::Write(std::string text)
1353 {
1354 #ifdef WINDOWS
1355         if ((this->fd < 0) || (this->m_internalFd > MAX_DESCRIPTORS))
1356 #else
1357         if ((this->fd < 0) || (this->fd > MAX_DESCRIPTORS))
1358 #endif
1359                 return;
1360
1361         try
1362         {
1363                 /* ServerInstance->Log(DEBUG,"C[%d] <- %s", this->GetFd(), text.c_str());
1364                  * WARNING: The above debug line is VERY loud, do NOT
1365                  * enable it till we have a good way of filtering it
1366                  * out of the logs (e.g. 1.2 would be good).
1367                  */
1368                 text.append("\r\n");
1369         }
1370         catch (...)
1371         {
1372                 ServerInstance->Log(DEBUG,"Exception in userrec::Write() std::string::append");
1373                 return;
1374         }
1375
1376         if (ServerInstance->Config->GetIOHook(this->GetPort()))
1377         {
1378                 try
1379                 {
1380                         ServerInstance->Config->GetIOHook(this->GetPort())->OnRawSocketWrite(this->fd, text.data(), text.length());
1381                 }
1382                 catch (CoreException& modexcept)
1383                 {
1384                         ServerInstance->Log(DEBUG, "%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
1385                 }
1386         }
1387         else
1388         {
1389                 this->AddWriteBuf(text);
1390         }
1391         ServerInstance->stats->statsSent += text.length();
1392         this->ServerInstance->SE->WantWrite(this);
1393 }
1394
1395 /** Write()
1396  */
1397 void userrec::Write(const char *text, ...)
1398 {
1399         va_list argsPtr;
1400         char textbuffer[MAXBUF];
1401
1402         va_start(argsPtr, text);
1403         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1404         va_end(argsPtr);
1405
1406         this->Write(std::string(textbuffer));
1407 }
1408
1409 void userrec::WriteServ(const std::string& text)
1410 {
1411         char textbuffer[MAXBUF];
1412
1413         snprintf(textbuffer,MAXBUF,":%s %s",ServerInstance->Config->ServerName,text.c_str());
1414         this->Write(std::string(textbuffer));
1415 }
1416
1417 /** WriteServ()
1418  *  Same as Write(), except `text' is prefixed with `:server.name '.
1419  */
1420 void userrec::WriteServ(const char* text, ...)
1421 {
1422         va_list argsPtr;
1423         char textbuffer[MAXBUF];
1424
1425         va_start(argsPtr, text);
1426         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1427         va_end(argsPtr);
1428
1429         this->WriteServ(std::string(textbuffer));
1430 }
1431
1432
1433 void userrec::WriteFrom(userrec *user, const std::string &text)
1434 {
1435         char tb[MAXBUF];
1436
1437         snprintf(tb,MAXBUF,":%s %s",user->GetFullHost(),text.c_str());
1438
1439         this->Write(std::string(tb));
1440 }
1441
1442
1443 /* write text from an originating user to originating user */
1444
1445 void userrec::WriteFrom(userrec *user, const char* text, ...)
1446 {
1447         va_list argsPtr;
1448         char textbuffer[MAXBUF];
1449
1450         va_start(argsPtr, text);
1451         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1452         va_end(argsPtr);
1453
1454         this->WriteFrom(user, std::string(textbuffer));
1455 }
1456
1457
1458 /* write text to an destination user from a source user (e.g. user privmsg) */
1459
1460 void userrec::WriteTo(userrec *dest, const char *data, ...)
1461 {
1462         char textbuffer[MAXBUF];
1463         va_list argsPtr;
1464
1465         va_start(argsPtr, data);
1466         vsnprintf(textbuffer, MAXBUF, data, argsPtr);
1467         va_end(argsPtr);
1468
1469         this->WriteTo(dest, std::string(textbuffer));
1470 }
1471
1472 void userrec::WriteTo(userrec *dest, const std::string &data)
1473 {
1474         dest->WriteFrom(this, data);
1475 }
1476
1477
1478 void userrec::WriteCommon(const char* text, ...)
1479 {
1480         char textbuffer[MAXBUF];
1481         va_list argsPtr;
1482
1483         if (this->registered != REG_ALL)
1484                 return;
1485
1486         va_start(argsPtr, text);
1487         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1488         va_end(argsPtr);
1489
1490         this->WriteCommon(std::string(textbuffer));
1491 }
1492
1493 void userrec::WriteCommon(const std::string &text)
1494 {
1495         try
1496         {
1497                 bool sent_to_at_least_one = false;
1498                 char tb[MAXBUF];
1499
1500                 if (this->registered != REG_ALL)
1501                         return;
1502
1503                 uniq_id++;
1504
1505                 /* We dont want to be doing this n times, just once */
1506                 snprintf(tb,MAXBUF,":%s %s",this->GetFullHost(),text.c_str());
1507                 std::string out = tb;
1508
1509                 for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1510                 {
1511                         CUList* ulist = v->first->GetUsers();
1512                         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1513                         {
1514                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1515                                 {
1516                                         already_sent[i->first->fd] = uniq_id;
1517                                         i->first->Write(out);
1518                                         sent_to_at_least_one = true;
1519                                 }
1520                         }
1521                 }
1522
1523                 /*
1524                  * if the user was not in any channels, no users will receive the text. Make sure the user
1525                  * receives their OWN message for WriteCommon
1526                  */
1527                 if (!sent_to_at_least_one)
1528                 {
1529                         this->Write(std::string(tb));
1530                 }
1531         }
1532
1533         catch (...)
1534         {
1535                 ServerInstance->Log(DEBUG,"Exception in userrec::WriteCommon()");
1536         }
1537 }
1538
1539
1540 /* write a formatted string to all users who share at least one common
1541  * channel, NOT including the source user e.g. for use in QUIT
1542  */
1543
1544 void userrec::WriteCommonExcept(const char* text, ...)
1545 {
1546         char textbuffer[MAXBUF];
1547         va_list argsPtr;
1548
1549         va_start(argsPtr, text);
1550         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1551         va_end(argsPtr);
1552
1553         this->WriteCommonExcept(std::string(textbuffer));
1554 }
1555
1556 void userrec::WriteCommonQuit(const std::string &normal_text, const std::string &oper_text)
1557 {
1558         char tb1[MAXBUF];
1559         char tb2[MAXBUF];
1560
1561         if (this->registered != REG_ALL)
1562                 return;
1563
1564         uniq_id++;
1565         snprintf(tb1,MAXBUF,":%s QUIT :%s",this->GetFullHost(),normal_text.c_str());
1566         snprintf(tb2,MAXBUF,":%s QUIT :%s",this->GetFullHost(),oper_text.c_str());
1567         std::string out1 = tb1;
1568         std::string out2 = tb2;
1569
1570         for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1571         {
1572                 CUList *ulist = v->first->GetUsers();
1573                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1574                 {
1575                         if (this != i->first)
1576                         {
1577                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1578                                 {
1579                                         already_sent[i->first->fd] = uniq_id;
1580                                         i->first->Write(IS_OPER(i->first) ? out2 : out1);
1581                                 }
1582                         }
1583                 }
1584         }
1585 }
1586
1587 void userrec::WriteCommonExcept(const std::string &text)
1588 {
1589         char tb1[MAXBUF];
1590         std::string out1;
1591
1592         if (this->registered != REG_ALL)
1593                 return;
1594
1595         uniq_id++;
1596         snprintf(tb1,MAXBUF,":%s %s",this->GetFullHost(),text.c_str());
1597         out1 = tb1;
1598
1599         for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1600         {
1601                 CUList *ulist = v->first->GetUsers();
1602                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1603                 {
1604                         if (this != i->first)
1605                         {
1606                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1607                                 {
1608                                         already_sent[i->first->fd] = uniq_id;
1609                                         i->first->Write(out1);
1610                                 }
1611                         }
1612                 }
1613         }
1614
1615 }
1616
1617 void userrec::WriteWallOps(const std::string &text)
1618 {
1619         if (!IS_OPER(this) && IS_LOCAL(this))
1620                 return;
1621
1622         std::string wallop = "WALLOPS :" + text;
1623
1624         for (std::vector<userrec*>::const_iterator i = ServerInstance->local_users.begin(); i != ServerInstance->local_users.end(); i++)
1625         {
1626                 userrec* t = *i;
1627                 if ((IS_LOCAL(t)) && (t->modes[UM_WALLOPS]))
1628                         this->WriteTo(t,wallop);
1629         }
1630 }
1631
1632 void userrec::WriteWallOps(const char* text, ...)
1633 {
1634         char textbuffer[MAXBUF];
1635         va_list argsPtr;
1636
1637         va_start(argsPtr, text);
1638         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1639         va_end(argsPtr);
1640
1641         this->WriteWallOps(std::string(textbuffer));
1642 }
1643
1644 /* return 0 or 1 depending if users u and u2 share one or more common channels
1645  * (used by QUIT, NICK etc which arent channel specific notices)
1646  *
1647  * The old algorithm in 1.0 for this was relatively inefficient, iterating over
1648  * the first users channels then the second users channels within the outer loop,
1649  * therefore it was a maximum of x*y iterations (upon returning 0 and checking
1650  * all possible iterations). However this new function instead checks against the
1651  * channel's userlist in the inner loop which is a std::map<userrec*,userrec*>
1652  * and saves us time as we already know what pointer value we are after.
1653  * Don't quote me on the maths as i am not a mathematician or computer scientist,
1654  * but i believe this algorithm is now x+(log y) maximum iterations instead.
1655  */
1656 bool userrec::SharesChannelWith(userrec *other)
1657 {
1658         if ((!other) || (this->registered != REG_ALL) || (other->registered != REG_ALL))
1659                 return false;
1660
1661         /* Outer loop */
1662         for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1663         {
1664                 /* Eliminate the inner loop (which used to be ~equal in size to the outer loop)
1665                  * by replacing it with a map::find which *should* be more efficient
1666                  */
1667                 if (i->first->HasUser(other))
1668                         return true;
1669         }
1670         return false;
1671 }
1672
1673 bool userrec::ChangeName(const char* gecos)
1674 {
1675         if (!strcmp(gecos, this->fullname))
1676                 return true;
1677
1678         if (IS_LOCAL(this))
1679         {
1680                 int MOD_RESULT = 0;
1681                 FOREACH_RESULT(I_OnChangeLocalUserGECOS,OnChangeLocalUserGECOS(this,gecos));
1682                 if (MOD_RESULT)
1683                         return false;
1684                 FOREACH_MOD(I_OnChangeName,OnChangeName(this,gecos));
1685         }
1686         strlcpy(this->fullname,gecos,MAXGECOS+1);
1687
1688         return true;
1689 }
1690
1691 bool userrec::ChangeDisplayedHost(const char* host)
1692 {
1693         if (!strcmp(host, this->dhost))
1694                 return true;
1695
1696         if (IS_LOCAL(this))
1697         {
1698                 int MOD_RESULT = 0;
1699                 FOREACH_RESULT(I_OnChangeLocalUserHost,OnChangeLocalUserHost(this,host));
1700                 if (MOD_RESULT)
1701                         return false;
1702                 FOREACH_MOD(I_OnChangeHost,OnChangeHost(this,host));
1703         }
1704         if (this->ServerInstance->Config->CycleHosts)
1705                 this->WriteCommonExcept("QUIT :Changing hosts");
1706
1707         /* Fix by Om: userrec::dhost is 65 long, this was truncating some long hosts */
1708         strlcpy(this->dhost,host,64);
1709
1710         this->InvalidateCache();
1711
1712         if (this->ServerInstance->Config->CycleHosts)
1713         {
1714                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1715                 {
1716                         i->first->WriteAllExceptSender(this, false, 0, "JOIN %s", i->first->name);
1717                         std::string n = this->ServerInstance->Modes->ModeString(this, i->first);
1718                         if (n.length() > 0)
1719                                 i->first->WriteAllExceptSender(this, true, 0, "MODE %s +%s", i->first->name, n.c_str());
1720                 }
1721         }
1722
1723         if (IS_LOCAL(this))
1724                 this->WriteServ("396 %s %s :is now your displayed host",this->nick,this->dhost);
1725
1726         return true;
1727 }
1728
1729 bool userrec::ChangeIdent(const char* newident)
1730 {
1731         if (!strcmp(newident, this->ident))
1732                 return true;
1733
1734         if (this->ServerInstance->Config->CycleHosts)
1735                 this->WriteCommonExcept("%s","QUIT :Changing ident");
1736
1737         strlcpy(this->ident, newident, IDENTMAX+2);
1738
1739         this->InvalidateCache();
1740
1741         if (this->ServerInstance->Config->CycleHosts)
1742         {
1743                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1744                 {
1745                         i->first->WriteAllExceptSender(this, false, 0, "JOIN %s", i->first->name);
1746                         std::string n = this->ServerInstance->Modes->ModeString(this, i->first);
1747                         if (n.length() > 0)
1748                                 i->first->WriteAllExceptSender(this, true, 0, "MODE %s +%s", i->first->name, n.c_str());
1749                 }
1750         }
1751
1752         return true;
1753 }
1754
1755 void userrec::SendAll(const char* command, char* text, ...)
1756 {
1757         char textbuffer[MAXBUF];
1758         char formatbuffer[MAXBUF];
1759         va_list argsPtr;
1760
1761         va_start(argsPtr, text);
1762         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1763         va_end(argsPtr);
1764
1765         snprintf(formatbuffer,MAXBUF,":%s %s $* :%s", this->GetFullHost(), command, textbuffer);
1766         std::string fmt = formatbuffer;
1767
1768         for (std::vector<userrec*>::const_iterator i = ServerInstance->local_users.begin(); i != ServerInstance->local_users.end(); i++)
1769         {
1770                 (*i)->Write(fmt);
1771         }
1772 }
1773
1774
1775 std::string userrec::ChannelList(userrec* source)
1776 {
1777         try
1778         {
1779                 std::string list;
1780                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1781                 {
1782                         /* If the target is the same as the sender, let them see all their channels.
1783                          * If the channel is NOT private/secret OR the user shares a common channel
1784                          * If the user is an oper, and the <options:operspywhois> option is set.
1785                          */
1786                         if ((source == this) || (IS_OPER(source) && ServerInstance->Config->OperSpyWhois) || (((!i->first->modes[CM_PRIVATE]) && (!i->first->modes[CM_SECRET])) || (i->first->HasUser(source))))
1787                         {
1788                                 list.append(i->first->GetPrefixChar(this)).append(i->first->name).append(" ");
1789                         }
1790                 }
1791                 return list;
1792         }
1793         catch (...)
1794         {
1795                 ServerInstance->Log(DEBUG,"Exception in userrec::ChannelList()");
1796                 return "";
1797         }
1798 }
1799
1800 void userrec::SplitChanList(userrec* dest, const std::string &cl)
1801 {
1802         std::string line;
1803         std::ostringstream prefix;
1804         std::string::size_type start, pos, length;
1805
1806         try
1807         {
1808                 prefix << this->nick << " " << dest->nick << " :";
1809                 line = prefix.str();
1810                 int namelen = strlen(ServerInstance->Config->ServerName) + 6;
1811
1812                 for (start = 0; (pos = cl.find(' ', start)) != std::string::npos; start = pos+1)
1813                 {
1814                         length = (pos == std::string::npos) ? cl.length() : pos;
1815
1816                         if (line.length() + namelen + length - start > 510)
1817                         {
1818                                 ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1819                                 line = prefix.str();
1820                         }
1821
1822                         if(pos == std::string::npos)
1823                         {
1824                                 line.append(cl.substr(start, length - start));
1825                                 break;
1826                         }
1827                         else
1828                         {
1829                                 line.append(cl.substr(start, length - start + 1));
1830                         }
1831                 }
1832
1833                 if (line.length())
1834                 {
1835                         ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1836                 }
1837         }
1838
1839         catch (...)
1840         {
1841                 ServerInstance->Log(DEBUG,"Exception in userrec::SplitChanList()");
1842         }
1843 }
1844
1845
1846 /* looks up a users password for their connection class (<ALLOW>/<DENY> tags)
1847  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1848  * then their ip will be taken as 'priority' anyway, so for example,
1849  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1850  */
1851 ConnectClass* userrec::GetClass()
1852 {
1853         for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1854         {
1855                 if (((match(this->GetIPString(),i->GetHost().c_str(),true)) || (match(this->host,i->GetHost().c_str()))))
1856                 {
1857                         if (i->GetPort())
1858                         {
1859                                 if (this->GetPort() == i->GetPort())
1860                                         return &(*i);
1861                                 else
1862                                         continue;
1863                         }
1864                         else
1865                                 return &(*i);
1866                 }
1867         }
1868         return NULL;
1869 }
1870
1871 void userrec::PurgeEmptyChannels()
1872 {
1873         std::vector<chanrec*> to_delete;
1874
1875         // firstly decrement the count on each channel
1876         for (UCListIter f = this->chans.begin(); f != this->chans.end(); f++)
1877         {
1878                 f->first->RemoveAllPrefixes(this);
1879                 if (f->first->DelUser(this) == 0)
1880                 {
1881                         /* No users left in here, mark it for deletion */
1882                         try
1883                         {
1884                                 to_delete.push_back(f->first);
1885                         }
1886                         catch (...)
1887                         {
1888                                 ServerInstance->Log(DEBUG,"Exception in userrec::PurgeEmptyChannels to_delete.push_back()");
1889                         }
1890                 }
1891         }
1892
1893         for (std::vector<chanrec*>::iterator n = to_delete.begin(); n != to_delete.end(); n++)
1894         {
1895                 chanrec* thischan = *n;
1896                 chan_hash::iterator i2 = ServerInstance->chanlist->find(thischan->name);
1897                 if (i2 != ServerInstance->chanlist->end())
1898                 {
1899                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(i2->second));
1900                         DELETE(i2->second);
1901                         ServerInstance->chanlist->erase(i2);
1902                         this->chans.erase(*n);
1903                 }
1904         }
1905
1906         this->UnOper();
1907 }
1908
1909 void userrec::ShowMOTD()
1910 {
1911         if (!ServerInstance->Config->MOTD.size())
1912         {
1913                 this->WriteServ("422 %s :Message of the day file is missing.",this->nick);
1914                 return;
1915         }
1916         this->WriteServ("375 %s :%s message of the day", this->nick, ServerInstance->Config->ServerName);
1917
1918         for (file_cache::iterator i = ServerInstance->Config->MOTD.begin(); i != ServerInstance->Config->MOTD.end(); i++)
1919                 this->WriteServ("372 %s :- %s",this->nick,i->c_str());
1920
1921         this->WriteServ("376 %s :End of message of the day.", this->nick);
1922 }
1923
1924 void userrec::ShowRULES()
1925 {
1926         if (!ServerInstance->Config->RULES.size())
1927         {
1928                 this->WriteServ("NOTICE %s :Rules file is missing.",this->nick);
1929                 return;
1930         }
1931         this->WriteServ("NOTICE %s :%s rules",this->nick,ServerInstance->Config->ServerName);
1932
1933         for (file_cache::iterator i = ServerInstance->Config->RULES.begin(); i != ServerInstance->Config->RULES.end(); i++)
1934                 this->WriteServ("NOTICE %s :%s",this->nick,i->c_str());
1935
1936         this->WriteServ("NOTICE %s :End of %s rules.",this->nick,ServerInstance->Config->ServerName);
1937 }
1938
1939 void userrec::HandleEvent(EventType et, int errornum)
1940 {
1941         /* WARNING: May delete this user! */
1942         int thisfd = this->GetFd();
1943
1944         try
1945         {
1946                 switch (et)
1947                 {
1948                         case EVENT_READ:
1949                                 ServerInstance->ProcessUser(this);
1950                         break;
1951                         case EVENT_WRITE:
1952                                 this->FlushWriteBuf();
1953                         break;
1954                         case EVENT_ERROR:
1955                                 /** This should be safe, but dont DARE do anything after it -- Brain */
1956                                 this->SetWriteError(errornum ? strerror(errornum) : "EOF from client");
1957                         break;
1958                 }
1959         }
1960         catch (...)
1961         {
1962                 ServerInstance->Log(DEBUG,"Exception in userrec::HandleEvent intercepted");
1963         }
1964
1965         /* If the user has raised an error whilst being processed, quit them now we're safe to */
1966         if ((ServerInstance->SE->GetRef(thisfd) == this))
1967         {
1968                 if (!WriteError.empty())
1969                 {
1970                         userrec::QuitUser(ServerInstance, this, GetWriteError());
1971                 }
1972         }
1973 }
1974
1975 void userrec::SetOperQuit(const std::string &oquit)
1976 {
1977         if (operquit)
1978                 return;
1979
1980         operquit = strdup(oquit.c_str());
1981 }
1982
1983 const char* userrec::GetOperQuit()
1984 {
1985         return operquit ? operquit : "";
1986 }
1987
1988 VisData::VisData()
1989 {
1990 }
1991
1992 VisData::~VisData()
1993 {
1994 }
1995
1996 bool VisData::VisibleTo(userrec* user)
1997 {
1998         return true;
1999 }
2000