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