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