src/users.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2007 InspIRCd Development Team
   6  * See: http://www.inspircd.org/wiki/index.php/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *            the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 #include "inspircd.h"
  15 #include "configreader.h"
  16 #include "channels.h"
  17 #include "users.h"
  18 #include <stdarg.h>
  19 #include "socketengine.h"
  20 #include "wildcard.h"
  21 #include "xline.h"
  22 #include "commands/cmd_whowas.h"
  23
  24 static unsigned long already_sent[MAX_DESCRIPTORS] = {0};
  25
  26 /* XXX: Used for speeding up WriteCommon operations */
  27 unsigned long uniq_id = 0;
  28
  29 bool InitTypes(ServerConfig* conf, const char* tag)
  30 {
  31         if (conf->opertypes.size())
  32         {
  33                 for (opertype_t::iterator n = conf->opertypes.begin(); n != conf->opertypes.end(); n++)
  34                 {
  35                         if (n->second)
  36                                 delete[] n->second;
  37                 }
  38         }
  39
  40         conf->opertypes.clear();
  41         return true;
  42 }
  43
  44 bool InitClasses(ServerConfig* conf, const char* tag)
  45 {
  46         if (conf->operclass.size())
  47         {
  48                 for (operclass_t::iterator n = conf->operclass.begin(); n != conf->operclass.end(); n++)
  49                 {
  50                         if (n->second)
  51                                 delete[] n->second;
  52                 }
  53         }
  54
  55         conf->operclass.clear();
  56         return true;
  57 }
  58
  59 bool DoType(ServerConfig* conf, const char* tag, char** entries, ValueList &values, int* types)
  60 {
  61         const char* TypeName = values[0].GetString();
  62         const char* Classes = values[1].GetString();
  63
  64         conf->opertypes[TypeName] = strnewdup(Classes);
  65         return true;
  66 }
  67
  68 bool DoClass(ServerConfig* conf, const char* tag, char** entries, ValueList &values, int* types)
  69 {
  70         const char* ClassName = values[0].GetString();
  71         const char* CommandList = values[1].GetString();
  72
  73         conf->operclass[ClassName] = strnewdup(CommandList);
  74         return true;
  75 }
  76
  77 bool DoneClassesAndTypes(ServerConfig* conf, const char* tag)
  78 {
  79         return true;
  80 }
  81
  82 std::string userrec::ProcessNoticeMasks(const char *sm)
  83 {
  84         bool adding = true, oldadding = false;
  85         const char *c = sm;
  86         std::string output;
  87
  88         while (c && *c)
  89         {
  90                 switch (*c)
  91                 {
  92                         case '+':
  93                                 adding = true;
  94                         break;
  95                         case '-':
  96                                 adding = false;
  97                         break;
  98                         case '*':
  99                                 for (unsigned char d = 'A'; d <= 'z'; d++)
 100                                 {
 101                                         if (ServerInstance->SNO->IsEnabled(d))
 102                                         {
 103                                                 if ((!IsNoticeMaskSet(d) && adding) || (IsNoticeMaskSet(d) && !adding))
 104                                                 {
 105                                                         if ((oldadding != adding) || (!output.length()))
 106                                                                 output += (adding ? '+' : '-');
 107
 108                                                         this->SetNoticeMask(d, adding);
 109
 110                                                         output += d;
 111                                                 }
 112                                         }
 113                                         oldadding = adding;
 114                                 }
 115                         break;
 116                         default:
 117                                 if ((*c >= 'A') && (*c <= 'z') && (ServerInstance->SNO->IsEnabled(*c)))
 118                                 {
 119                                         if ((!IsNoticeMaskSet(*c) && adding) || (IsNoticeMaskSet(*c) && !adding))
 120                                         {
 121                                                 if ((oldadding != adding) || (!output.length()))
 122                                                         output += (adding ? '+' : '-');
 123
 124                                                 this->SetNoticeMask(*c, adding);
 125
 126                                                 output += *c;
 127                                         }
 128                                 }
 129                                 oldadding = adding;
 130                         break;
 131                 }
 132
 133                 *c++;
 134         }
 135
 136         return output;
 137 }
 138
 139 void userrec::StartDNSLookup()
 140 {
 141         try
 142         {
 143                 bool cached;
 144                 const char* ip = this->GetIPString();
 145
 146                 /* Special case for 4in6 (Have i mentioned i HATE 4in6?) */
 147                 if (!strncmp(ip, "0::ffff:", 8))
 148                         res_reverse = new UserResolver(this->ServerInstance, this, ip + 8, DNS_QUERY_PTR4, cached);
 149                 else
 150                         res_reverse = new UserResolver(this->ServerInstance, this, ip, this->GetProtocolFamily() == AF_INET ? DNS_QUERY_PTR4 : DNS_QUERY_PTR6, cached);
 151
 152                 this->ServerInstance->AddResolver(res_reverse, cached);
 153         }
 154         catch (CoreException& e)
 155         {
 156                 ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
 157         }
 158 }
 159
 160 UserResolver::UserResolver(InspIRCd* Instance, userrec* user, std::string to_resolve, QueryType qt, bool &cache) :
 161         Resolver(Instance, to_resolve, qt, cache), bound_user(user)
 162 {
 163         this->fwd = (qt == DNS_QUERY_A || qt == DNS_QUERY_AAAA);
 164         this->bound_fd = user->GetFd();
 165 }
 166
 167 void UserResolver::OnLookupComplete(const std::string &result, unsigned int ttl, bool cached)
 168 {
 169         if ((!this->fwd) && (ServerInstance->SE->GetRef(this->bound_fd) == this->bound_user))
 170         {
 171                 this->bound_user->stored_host = result;
 172                 try
 173                 {
 174                         /* Check we didnt time out */
 175                         if (this->bound_user->registered != REG_ALL)
 176                         {
 177                                 bool cached;
 178 #ifdef IPV6
 179                                 if (this->bound_user->GetProtocolFamily() == AF_INET6)
 180                                 {
 181                                         /* IPV6 forward lookup (with possibility of 4in6) */
 182                                         const char* ip = this->bound_user->GetIPString();
 183                                         bound_user->res_forward = new UserResolver(this->ServerInstance, this->bound_user, result, (!strncmp(ip, "0::ffff:", 8) ? DNS_QUERY_A : DNS_QUERY_AAAA), cached);
 184                                 }
 185                                 else
 186                                         /* IPV4 lookup (mixed protocol mode) */
 187 #endif
 188                                 /* IPV4 lookup (ipv4 only mode) */
 189                                 bound_user->res_forward = new UserResolver(this->ServerInstance, this->bound_user, result, DNS_QUERY_A, cached);
 190                                 this->ServerInstance->AddResolver(bound_user->res_forward, cached);
 191                         }
 192                 }
 193                 catch (CoreException& e)
 194                 {
 195                         ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
 196                 }
 197         }
 198         else if ((this->fwd) && (ServerInstance->SE->GetRef(this->bound_fd) == this->bound_user))
 199         {
 200                 /* Both lookups completed */
 201                 std::string result2("0::ffff:");
 202                 result2.append(result);
 203                 if (this->bound_user->GetIPString() == result || this->bound_user->GetIPString() == result2)
 204                 {
 205                         std::string hostname = this->bound_user->stored_host;
 206                         if (hostname.length() < 65)
 207                         {
 208                                 /* Check we didnt time out */
 209                                 if ((this->bound_user->registered != REG_ALL) && (!this->bound_user->dns_done))
 210                                 {
 211                                         /* Hostnames starting with : are not a good thing (tm) */
 212                                         if (*(hostname.c_str()) == ':')
 213                                                 hostname.insert(0, "0");
 214
 215                                         this->bound_user->WriteServ("NOTICE Auth :*** Found your hostname (%s)%s", hostname.c_str(), (cached ? " -- cached" : ""));
 216                                         this->bound_user->dns_done = true;
 217                                         strlcpy(this->bound_user->dhost, hostname.c_str(),64);
 218                                         strlcpy(this->bound_user->host, hostname.c_str(),64);
 219                                         /* Invalidate cache */
 220                                         this->bound_user->InvalidateCache();
 221                                 }
 222                         }
 223                         else
 224                         {
 225                                 if (!this->bound_user->dns_done)
 226                                 {
 227                                         this->bound_user->WriteServ("NOTICE Auth :*** Your hostname is longer than the maximum of 64 characters, using your IP address (%s) instead.", this->bound_user->GetIPString());
 228                                         this->bound_user->dns_done = true;
 229                                 }
 230                         }
 231                 }
 232                 else
 233                 {
 234                         if (!this->bound_user->dns_done)
 235                         {
 236                                 this->bound_user->WriteServ("NOTICE Auth :*** Your hostname does not match up with your IP address. Sorry, using your IP address (%s) instead.", this->bound_user->GetIPString());
 237                                 this->bound_user->dns_done = true;
 238                         }
 239                 }
 240         }
 241 }
 242
 243 void UserResolver::OnError(ResolverError e, const std::string &errormessage)
 244 {
 245         if (ServerInstance->SE->GetRef(this->bound_fd) == this->bound_user)
 246         {
 247                 /* Since dns timeout is implemented outside of the resolver, this was a race condition that could result in this message being sent *after*
 248                  * the user was fully connected. This check fixes that issue  - Special */
 249                 if (!this->bound_user->dns_done)
 250                 {
 251                         /* Error message here */
 252                         this->bound_user->WriteServ("NOTICE Auth :*** Could not resolve your hostname: %s; using your IP address (%s) instead.", errormessage.c_str(), this->bound_user->GetIPString());
 253                         this->bound_user->dns_done = true;
 254                 }
 255         }
 256 }
 257
 258
 259 bool userrec::IsNoticeMaskSet(unsigned char sm)
 260 {
 261         return (snomasks[sm-65]);
 262 }
 263
 264 void userrec::SetNoticeMask(unsigned char sm, bool value)
 265 {
 266         snomasks[sm-65] = value;
 267 }
 268
 269 const char* userrec::FormatNoticeMasks()
 270 {
 271         static char data[MAXBUF];
 272         int offset = 0;
 273
 274         for (int n = 0; n < 64; n++)
 275         {
 276                 if (snomasks[n])
 277                         data[offset++] = n+65;
 278         }
 279
 280         data[offset] = 0;
 281         return data;
 282 }
 283
 284
 285
 286 bool userrec::IsModeSet(unsigned char m)
 287 {
 288         return (modes[m-65]);
 289 }
 290
 291 void userrec::SetMode(unsigned char m, bool value)
 292 {
 293         modes[m-65] = value;
 294 }
 295
 296 const char* userrec::FormatModes()
 297 {
 298         static char data[MAXBUF];
 299         int offset = 0;
 300         for (int n = 0; n < 64; n++)
 301         {
 302                 if (modes[n])
 303                         data[offset++] = n+65;
 304         }
 305         data[offset] = 0;
 306         return data;
 307 }
 308
 309 void userrec::DecrementModes()
 310 {
 311         for (int n = 0; n < 64; n++)
 312         {
 313                 if (modes[n])
 314                 {
 315                         ModeHandler* mh = ServerInstance->Modes->FindMode(n+65, MODETYPE_USER);
 316                         if (mh)
 317                                 mh->ChangeCount(-1);
 318                 }
 319         }
 320 }
 321
 322 userrec::userrec(InspIRCd* Instance) : ServerInstance(Instance)
 323 {
 324         // the PROPER way to do it, AVOID bzero at *ALL* costs
 325         *password = *nick = *ident = *host = *dhost = *fullname = *awaymsg = *oper = 0;
 326         server = (char*)Instance->FindServerNamePtr(Instance->Config->ServerName);
 327         reset_due = ServerInstance->Time();
 328         age = ServerInstance->Time(true);
 329         lines_in = lastping = signon = idle_lastmsg = nping = registered = 0;
 330         ChannelCount = timeout = flood = bytes_in = bytes_out = cmds_in = cmds_out = 0;
 331         muted = exempt = haspassed = dns_done = false;
 332         fd = -1;
 333         recvq.clear();
 334         sendq.clear();
 335         WriteError.clear();
 336         res_forward = res_reverse = NULL;
 337         Visibility = NULL;
 338         ip = NULL;
 339         chans.clear();
 340         invites.clear();
 341         memset(modes,0,sizeof(modes));
 342         memset(snomasks,0,sizeof(snomasks));
 343         /* Invalidate cache */
 344         operquit = cached_fullhost = cached_hostip = cached_makehost = cached_fullrealhost = NULL;
 345 }
 346
 347 void userrec::RemoveCloneCounts()
 348 {
 349         clonemap::iterator x = ServerInstance->local_clones.find(this->GetIPString());
 350         if (x != ServerInstance->local_clones.end())
 351         {
 352                 x->second--;
 353                 if (!x->second)
 354                 {
 355                         ServerInstance->local_clones.erase(x);
 356                 }
 357         }
 358
 359         clonemap::iterator y = ServerInstance->global_clones.find(this->GetIPString());
 360         if (y != ServerInstance->global_clones.end())
 361         {
 362                 y->second--;
 363                 if (!y->second)
 364                 {
 365                         ServerInstance->global_clones.erase(y);
 366                 }
 367         }
 368 }
 369
 370 userrec::~userrec()
 371 {
 372         this->InvalidateCache();
 373         this->DecrementModes();
 374         if (operquit)
 375                 free(operquit);
 376         if (ip)
 377         {
 378                 this->RemoveCloneCounts();
 379
 380                 if (this->GetProtocolFamily() == AF_INET)
 381                 {
 382                         delete (sockaddr_in*)ip;
 383                 }
 384 #ifdef SUPPORT_IP6LINKS
 385                 else
 386                 {
 387                         delete (sockaddr_in6*)ip;
 388                 }
 389 #endif
 390         }
 391 }
 392
 393 char* userrec::MakeHost()
 394 {
 395         if (this->cached_makehost)
 396                 return this->cached_makehost;
 397
 398         char nhost[MAXBUF];
 399         /* This is much faster than snprintf */
 400         char* t = nhost;
 401         for(char* n = ident; *n; n++)
 402                 *t++ = *n;
 403         *t++ = '@';
 404         for(char* n = host; *n; n++)
 405                 *t++ = *n;
 406         *t = 0;
 407
 408         this->cached_makehost = strdup(nhost);
 409
 410         return this->cached_makehost;
 411 }
 412
 413 char* userrec::MakeHostIP()
 414 {
 415         if (this->cached_hostip)
 416                 return this->cached_hostip;
 417
 418         char ihost[MAXBUF];
 419         /* This is much faster than snprintf */
 420         char* t = ihost;
 421         for(char* n = ident; *n; n++)
 422                 *t++ = *n;
 423         *t++ = '@';
 424         for(const char* n = this->GetIPString(); *n; n++)
 425                 *t++ = *n;
 426         *t = 0;
 427
 428         this->cached_hostip = strdup(ihost);
 429
 430         return this->cached_hostip;
 431 }
 432
 433 void userrec::CloseSocket()
 434 {
 435         shutdown(this->fd,2);
 436         close(this->fd);
 437 }
 438
 439 char* userrec::GetFullHost()
 440 {
 441         if (this->cached_fullhost)
 442                 return this->cached_fullhost;
 443
 444         char result[MAXBUF];
 445         char* t = result;
 446         for(char* n = nick; *n; n++)
 447                 *t++ = *n;
 448         *t++ = '!';
 449         for(char* n = ident; *n; n++)
 450                 *t++ = *n;
 451         *t++ = '@';
 452         for(char* n = dhost; *n; n++)
 453                 *t++ = *n;
 454         *t = 0;
 455
 456         this->cached_fullhost = strdup(result);
 457
 458         return this->cached_fullhost;
 459 }
 460
 461 char* userrec::MakeWildHost()
 462 {
 463         static char nresult[MAXBUF];
 464         char* t = nresult;
 465         *t++ = '*';     *t++ = '!';
 466         *t++ = '*';     *t++ = '@';
 467         for(char* n = dhost; *n; n++)
 468                 *t++ = *n;
 469         *t = 0;
 470         return nresult;
 471 }
 472
 473 int userrec::ReadData(void* buffer, size_t size)
 474 {
 475         if (IS_LOCAL(this))
 476         {
 477 #ifndef WIN32
 478                 return read(this->fd, buffer, size);
 479 #else
 480                 return recv(this->fd, (char*)buffer, size, 0);
 481 #endif
 482         }
 483         else
 484                 return 0;
 485 }
 486
 487
 488 char* userrec::GetFullRealHost()
 489 {
 490         if (this->cached_fullrealhost)
 491                 return this->cached_fullrealhost;
 492
 493         char fresult[MAXBUF];
 494         char* t = fresult;
 495         for(char* n = nick; *n; n++)
 496                 *t++ = *n;
 497         *t++ = '!';
 498         for(char* n = ident; *n; n++)
 499                 *t++ = *n;
 500         *t++ = '@';
 501         for(char* n = host; *n; n++)
 502                 *t++ = *n;
 503         *t = 0;
 504
 505         this->cached_fullrealhost = strdup(fresult);
 506
 507         return this->cached_fullrealhost;
 508 }
 509
 510 bool userrec::IsInvited(const irc::string &channel)
 511 {
 512         for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 513         {
 514                 if (channel == *i)
 515                 {
 516                         return true;
 517                 }
 518         }
 519         return false;
 520 }
 521
 522 InvitedList* userrec::GetInviteList()
 523 {
 524         return &invites;
 525 }
 526
 527 void userrec::InviteTo(const irc::string &channel)
 528 {
 529         invites.push_back(channel);
 530 }
 531
 532 void userrec::RemoveInvite(const irc::string &channel)
 533 {
 534         for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 535         {
 536                 if (channel == *i)
 537                 {
 538                         invites.erase(i);
 539                         return;
 540                 }
 541         }
 542 }
 543
 544 bool userrec::HasPermission(const std::string &command)
 545 {
 546         char* mycmd;
 547         char* savept;
 548         char* savept2;
 549
 550         /*
 551          * users on remote servers can completely bypass all permissions based checks.
 552          * This prevents desyncs when one server has different type/class tags to another.
 553          * That having been said, this does open things up to the possibility of source changes
 554          * allowing remote kills, etc - but if they have access to the src, they most likely have
 555          * access to the conf - so it's an end to a means either way.
 556          */
 557         if (!IS_LOCAL(this))
 558                 return true;
 559
 560         // are they even an oper at all?
 561         if (IS_OPER(this))
 562         {
 563                 opertype_t::iterator iter_opertype = ServerInstance->Config->opertypes.find(this->oper);
 564                 if (iter_opertype != ServerInstance->Config->opertypes.end())
 565                 {
 566                         char* Classes = strdup(iter_opertype->second);
 567                         char* myclass = strtok_r(Classes," ",&savept);
 568                         while (myclass)
 569                         {
 570                                 operclass_t::iterator iter_operclass = ServerInstance->Config->operclass.find(myclass);
 571                                 if (iter_operclass != ServerInstance->Config->operclass.end())
 572                                 {
 573                                         char* CommandList = strdup(iter_operclass->second);
 574                                         mycmd = strtok_r(CommandList," ",&savept2);
 575                                         while (mycmd)
 576                                         {
 577                                                 if ((!strcasecmp(mycmd,command.c_str())) || (*mycmd == '*'))
 578                                                 {
 579                                                         free(Classes);
 580                                                         free(CommandList);
 581                                                         return true;
 582                                                 }
 583                                                 mycmd = strtok_r(NULL," ",&savept2);
 584                                         }
 585                                         free(CommandList);
 586                                 }
 587                                 myclass = strtok_r(NULL," ",&savept);
 588                         }
 589                         free(Classes);
 590                 }
 591         }
 592         return false;
 593 }
 594
 595 /** NOTE: We cannot pass a const reference to this method.
 596  * The string is changed by the workings of the method,
 597  * so that if we pass const ref, we end up copying it to
 598  * something we can change anyway. Makes sense to just let
 599  * the compiler do that copy for us.
 600  */
 601 bool userrec::AddBuffer(std::string a)
 602 {
 603         try
 604         {
 605                 std::string::size_type i = a.rfind('\r');
 606
 607                 while (i != std::string::npos)
 608                 {
 609                         a.erase(i, 1);
 610                         i = a.rfind('\r');
 611                 }
 612
 613                 if (a.length())
 614                         recvq.append(a);
 615
 616                 if (recvq.length() > (unsigned)this->recvqmax)
 617                 {
 618                         this->SetWriteError("RecvQ exceeded");
 619                         ServerInstance->WriteOpers("*** User %s RecvQ of %d exceeds connect class maximum of %d",this->nick,recvq.length(),this->recvqmax);
 620                         return false;
 621                 }
 622
 623                 return true;
 624         }
 625
 626         catch (...)
 627         {
 628                 ServerInstance->Log(DEBUG,"Exception in userrec::AddBuffer()");
 629                 return false;
 630         }
 631 }
 632
 633 bool userrec::BufferIsReady()
 634 {
 635         return (recvq.find('\n') != std::string::npos);
 636 }
 637
 638 void userrec::ClearBuffer()
 639 {
 640         recvq.clear();
 641 }
 642
 643 std::string userrec::GetBuffer()
 644 {
 645         try
 646         {
 647                 if (!recvq.length())
 648                         return "";
 649
 650                 /* Strip any leading \r or \n off the string.
 651                  * Usually there are only one or two of these,
 652                  * so its is computationally cheap to do.
 653                  */
 654                 std::string::iterator t = recvq.begin();
 655                 while (t != recvq.end() && (*t == '\r' || *t == '\n'))
 656                 {
 657                         recvq.erase(t);
 658                         t = recvq.begin();
 659                 }
 660
 661                 for (std::string::iterator x = recvq.begin(); x != recvq.end(); x++)
 662                 {
 663                         /* Find the first complete line, return it as the
 664                          * result, and leave the recvq as whats left
 665                          */
 666                         if (*x == '\n')
 667                         {
 668                                 std::string ret = std::string(recvq.begin(), x);
 669                                 recvq.erase(recvq.begin(), x + 1);
 670                                 return ret;
 671                         }
 672                 }
 673                 return "";
 674         }
 675
 676         catch (...)
 677         {
 678                 ServerInstance->Log(DEBUG,"Exception in userrec::GetBuffer()");
 679                 return "";
 680         }
 681 }
 682
 683 void userrec::AddWriteBuf(const std::string &data)
 684 {
 685         if (*this->GetWriteError())
 686                 return;
 687
 688         if (sendq.length() + data.length() > (unsigned)this->sendqmax)
 689         {
 690                 /*
 691                  * Fix by brain - Set the error text BEFORE calling writeopers, because
 692                  * if we dont it'll recursively  call here over and over again trying
 693                  * to repeatedly add the text to the sendq!
 694                  */
 695                 this->SetWriteError("SendQ exceeded");
 696                 ServerInstance->WriteOpers("*** User %s SendQ of %d exceeds connect class maximum of %d",this->nick,sendq.length() + data.length(),this->sendqmax);
 697                 return;
 698         }
 699
 700         try
 701         {
 702                 if (data.length() > MAXBUF - 2) /* MAXBUF has a value of 514, to account for line terminators */
 703                         sendq.append(data.substr(0,MAXBUF - 4)).append("\r\n"); /* MAXBUF-4 = 510 */
 704                 else
 705                         sendq.append(data);
 706         }
 707         catch (...)
 708         {
 709                 this->SetWriteError("SendQ exceeded");
 710                 ServerInstance->WriteOpers("*** User %s SendQ got an exception",this->nick);
 711         }
 712 }
 713
 714 // send AS MUCH OF THE USERS SENDQ as we are able to (might not be all of it)
 715 void userrec::FlushWriteBuf()
 716 {
 717         try
 718         {
 719                 if ((this->fd == FD_MAGIC_NUMBER) || (*this->GetWriteError()))
 720                 {
 721                         sendq.clear();
 722                 }
 723                 if ((sendq.length()) && (this->fd != FD_MAGIC_NUMBER))
 724                 {
 725                         int old_sendq_length = sendq.length();
 726 #ifndef WIN32
 727                 int n_sent = write(this->fd, this->sendq.data(), this->sendq.length());
 728 #else
 729                 int n_sent = send(this->fd, (const char*)this->sendq.data(), this->sendq.length(), 0);
 730 #endif
 731                         if (n_sent == -1)
 732                         {
 733                                 if (errno == EAGAIN)
 734                                 {
 735                                         /* The socket buffer is full. This isnt fatal,
 736                                          * try again later.
 737                                          */
 738                                         this->ServerInstance->SE->WantWrite(this);
 739                                 }
 740                                 else
 741                                 {
 742                                         /* Fatal error, set write error and bail
 743                                          */
 744                                         this->SetWriteError(errno ? strerror(errno) : "EOF from client");
 745                                         return;
 746                                 }
 747                         }
 748                         else
 749                         {
 750                                 /* advance the queue */
 751                                 if (n_sent)
 752                                         this->sendq = this->sendq.substr(n_sent);
 753                                 /* update the user's stats counters */
 754                                 this->bytes_out += n_sent;
 755                                 this->cmds_out++;
 756                                 if (n_sent != old_sendq_length)
 757                                         this->ServerInstance->SE->WantWrite(this);
 758                         }
 759                 }
 760         }
 761
 762         catch (...)
 763         {
 764                 ServerInstance->Log(DEBUG,"Exception in userrec::FlushWriteBuf()");
 765         }
 766
 767         if (this->sendq.empty())
 768         {
 769                 FOREACH_MOD(I_OnBufferFlushed,OnBufferFlushed(this));
 770         }
 771 }
 772
 773 void userrec::SetWriteError(const std::string &error)
 774 {
 775         try
 776         {
 777                 // don't try to set the error twice, its already set take the first string.
 778                 if (this->WriteError.empty())
 779                         this->WriteError = error;
 780         }
 781
 782         catch (...)
 783         {
 784                 ServerInstance->Log(DEBUG,"Exception in userrec::SetWriteError()");
 785         }
 786 }
 787
 788 const char* userrec::GetWriteError()
 789 {
 790         return this->WriteError.c_str();
 791 }
 792
 793 void userrec::Oper(const std::string &opertype)
 794 {
 795         try
 796         {
 797                 this->modes[UM_OPERATOR] = 1;
 798                 this->WriteServ("MODE %s :+o", this->nick);
 799                 FOREACH_MOD(I_OnOper, OnOper(this, opertype));
 800                 ServerInstance->Log(DEFAULT,"OPER: %s!%s@%s opered as type: %s", this->nick, this->ident, this->host, opertype.c_str());
 801                 strlcpy(this->oper, opertype.c_str(), NICKMAX - 1);
 802                 ServerInstance->all_opers.push_back(this);
 803                 FOREACH_MOD(I_OnPostOper,OnPostOper(this, opertype));
 804         }
 805
 806         catch (...)
 807         {
 808                 ServerInstance->Log(DEBUG,"Exception in userrec::Oper()");
 809         }
 810 }
 811
 812 void userrec::UnOper()
 813 {
 814         try
 815         {
 816                 if (IS_OPER(this))
 817                 {
 818                         // unset their oper type (what IS_OPER checks), and remove +o
 819                         *this->oper = 0;
 820                         this->modes[UM_OPERATOR] = 0;
 821
 822                         // remove them from the opers list.
 823                         for (std::vector<userrec*>::iterator a = ServerInstance->all_opers.begin(); a < ServerInstance->all_opers.end(); a++)
 824                         {
 825                                 if (*a == this)
 826                                 {
 827                                         ServerInstance->all_opers.erase(a);
 828                                         return;
 829                                 }
 830                         }
 831                 }
 832         }
 833
 834         catch (...)
 835         {
 836                 ServerInstance->Log(DEBUG,"Exception in userrec::UnOper()");
 837         }
 838 }
 839
 840 void userrec::QuitUser(InspIRCd* Instance, userrec *user, const std::string &quitreason, const char* operreason)
 841 {
 842         user->muted = true;
 843         Instance->GlobalCulls.AddItem(user, quitreason.c_str(), operreason);
 844 }
 845
 846 /* adds or updates an entry in the whowas list */
 847 void userrec::AddToWhoWas()
 848 {
 849         command_t* whowas_command = ServerInstance->Parser->GetHandler("WHOWAS");
 850         if (whowas_command)
 851         {
 852                 std::deque<classbase*> params;
 853                 params.push_back(this);
 854                 whowas_command->HandleInternal(WHOWAS_ADD, params);
 855         }
 856 }
 857
 858 /* add a client connection to the sockets list */
 859 void userrec::AddClient(InspIRCd* Instance, int socket, int port, bool iscached, int socketfamily, sockaddr* ip)
 860 {
 861         std::string tempnick = ConvToStr(socket) + "-unknown";
 862         user_hash::iterator iter = Instance->clientlist->find(tempnick);
 863         char ipaddr[MAXBUF];
 864 #ifdef IPV6
 865         if (socketfamily == AF_INET6)
 866                 inet_ntop(AF_INET6, &((const sockaddr_in6*)ip)->sin6_addr, ipaddr, sizeof(ipaddr));
 867         else
 868 #endif
 869         inet_ntop(AF_INET, &((const sockaddr_in*)ip)->sin_addr, ipaddr, sizeof(ipaddr));
 870         userrec* New;
 871         int j = 0;
 872
 873         Instance->unregistered_count++;
 874
 875         /*
 876          * fix by brain.
 877          * as these nicknames are 'RFC impossible', we can be sure nobody is going to be
 878          * using one as a registered connection. As they are per fd, we can also safely assume
 879          * that we wont have collisions. Therefore, if the nick exists in the list, its only
 880          * used by a dead socket, erase the iterator so that the new client may reclaim it.
 881          * this was probably the cause of 'server ignores me when i hammer it with reconnects'
 882          * issue in earlier alphas/betas
 883          */
 884         if (iter != Instance->clientlist->end())
 885         {
 886                 userrec* goner = iter->second;
 887                 DELETE(goner);
 888                 Instance->clientlist->erase(iter);
 889         }
 890
 891         New = new userrec(Instance);
 892         (*(Instance->clientlist))[tempnick] = New;
 893         New->fd = socket;
 894         strlcpy(New->nick,tempnick.c_str(),NICKMAX-1);
 895
 896         New->server = Instance->FindServerNamePtr(Instance->Config->ServerName);
 897         /* We don't need range checking here, we KNOW 'unknown\0' will fit into the ident field. */
 898         strcpy(New->ident, "unknown");
 899
 900         New->registered = REG_NONE;
 901         New->signon = Instance->Time() + Instance->Config->dns_timeout;
 902         New->lastping = 1;
 903
 904         New->SetSockAddr(socketfamily, ipaddr, port);
 905
 906         /* Smarter than your average bear^H^H^H^Hset of strlcpys. */
 907         for (const char* temp = New->GetIPString(); *temp && j < 64; temp++, j++)
 908                 New->dhost[j] = New->host[j] = *temp;
 909         New->dhost[j] = New->host[j] = 0;
 910
 911         Instance->AddLocalClone(New);
 912         Instance->AddGlobalClone(New);
 913
 914         /*
 915          * First class check. We do this again in FullConnect after DNS is done, and NICK/USER is recieved.
 916          * See my note down there for why this is required. DO NOT REMOVE. :) -- w00t
 917          */
 918         ConnectClass* i = New->GetClass();
 919
 920         if (!i)
 921         {
 922                 userrec::QuitUser(Instance, New, "Access denied by configuration");
 923                 return;
 924         }
 925
 926         New->CheckClass();
 927
 928         New->pingmax = i->GetPingTime();
 929         New->nping = Instance->Time() + i->GetPingTime() + Instance->Config->dns_timeout;
 930         New->timeout = Instance->Time() + i->GetRegTimeout();
 931         New->flood = i->GetFlood();
 932         New->threshold = i->GetThreshold();
 933         New->sendqmax = i->GetSendqMax();
 934         New->recvqmax = i->GetRecvqMax();
 935
 936         Instance->local_users.push_back(New);
 937
 938         if ((Instance->local_users.size() > Instance->Config->SoftLimit) || (Instance->local_users.size() >= MAXCLIENTS))
 939         {
 940                 Instance->WriteOpers("*** Warning: softlimit value has been reached: %d clients", Instance->Config->SoftLimit);
 941                 userrec::QuitUser(Instance, New,"No more connections allowed");
 942                 return;
 943         }
 944
 945         /*
 946          * XXX -
 947          * this is done as a safety check to keep the file descriptors within range of fd_ref_table.
 948          * its a pretty big but for the moment valid assumption:
 949          * file descriptors are handed out starting at 0, and are recycled as theyre freed.
 950          * therefore if there is ever an fd over 65535, 65536 clients must be connected to the
 951          * irc server at once (or the irc server otherwise initiating this many connections, files etc)
 952          * which for the time being is a physical impossibility (even the largest networks dont have more
 953          * than about 10,000 users on ONE server!)
 954          */
 955 #ifndef WINDOWS
 956         if ((unsigned int)socket >= MAX_DESCRIPTORS)
 957         {
 958                 userrec::QuitUser(Instance, New, "Server is full");
 959                 return;
 960         }
 961 #endif
 962
 963         New->exempt = (Instance->XLines->matches_exception(New) != NULL);
 964         if (!New->exempt)
 965         {
 966                 ZLine* r = Instance->XLines->matches_zline(ipaddr);
 967                 if (r)
 968                 {
 969                         char reason[MAXBUF];
 970                         if (*Instance->Config->MoronBanner)
 971                                 New->WriteServ("NOTICE %s :*** %s", New->nick, Instance->Config->MoronBanner);
 972                         snprintf(reason,MAXBUF,"Z-Lined: %s",r->reason);
 973                         userrec::QuitUser(Instance, New, reason);
 974                         return;
 975                 }
 976         }
 977
 978         if (socket > -1)
 979         {
 980                 if (!Instance->SE->AddFd(New))
 981                 {
 982                         userrec::QuitUser(Instance, New, "Internal error handling connection");
 983                         return;
 984                 }
 985         }
 986
 987         /* NOTE: even if dns lookups are *off*, we still need to display this.
 988          * BOPM and other stuff requires it.
 989          */
 990         New->WriteServ("NOTICE Auth :*** Looking up your hostname...");
 991 }
 992
 993 unsigned long userrec::GlobalCloneCount()
 994 {
 995         clonemap::iterator x = ServerInstance->global_clones.find(this->GetIPString());
 996         if (x != ServerInstance->global_clones.end())
 997                 return x->second;
 998         else
 999                 return 0;
1000 }
1001
1002 unsigned long userrec::LocalCloneCount()
1003 {
1004         clonemap::iterator x = ServerInstance->local_clones.find(this->GetIPString());
1005         if (x != ServerInstance->local_clones.end())
1006                 return x->second;
1007         else
1008                 return 0;
1009 }
1010
1011 /*
1012  * Check class restrictions
1013  */
1014 void userrec::CheckClass()
1015 {
1016         ConnectClass* a = this->GetClass();
1017
1018         if ((!a) || (a->GetType() == CC_DENY))
1019         {
1020                 userrec::QuitUser(ServerInstance, this, "Unauthorised connection");
1021                 return;
1022         }
1023         else if ((a->GetMaxLocal()) && (this->LocalCloneCount() > a->GetMaxLocal()))
1024         {
1025                 userrec::QuitUser(ServerInstance, this, "No more connections allowed from your host via this connect class (local)");
1026                 ServerInstance->WriteOpers("*** WARNING: maximum LOCAL connections (%ld) exceeded for IP %s", a->GetMaxLocal(), this->GetIPString());
1027                 return;
1028         }
1029         else if ((a->GetMaxGlobal()) && (this->GlobalCloneCount() > a->GetMaxGlobal()))
1030         {
1031                 userrec::QuitUser(ServerInstance, this, "No more connections allowed from your host via this connect class (global)");
1032                 ServerInstance->WriteOpers("*** WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s", a->GetMaxGlobal(), this->GetIPString());
1033                 return;
1034         }
1035 }
1036
1037 void userrec::FullConnect()
1038 {
1039         ServerInstance->stats->statsConnects++;
1040         this->idle_lastmsg = ServerInstance->Time();
1041
1042         /*
1043          * You may be thinking "wtf, we checked this in userrec::AddClient!" - and yes, we did, BUT.
1044          * At the time AddClient is called, we don't have a resolved host, by here we probably do - which
1045          * may put the user into a totally seperate class with different restrictions! so we *must* check again.
1046          * Don't remove this! -- w00t
1047          */
1048         this->CheckClass();
1049
1050         /* Check the password, if one is required by the user's connect class.
1051          * This CANNOT be in CheckClass(), because that is called prior to PASS as well!
1052          */
1053         if ((!this->GetClass()->GetPass().empty()) && (!this->haspassed))
1054         {
1055                 userrec::QuitUser(ServerInstance, this, "Invalid password");
1056                 return;
1057         }
1058
1059         if (!this->exempt)
1060         {
1061                 GLine* r = ServerInstance->XLines->matches_gline(this);
1062
1063                 if (r)
1064                 {
1065                         this->muted = true;
1066                         char reason[MAXBUF];
1067                         if (*ServerInstance->Config->MoronBanner)
1068                                 this->WriteServ("NOTICE %s :*** %s", this->nick, ServerInstance->Config->MoronBanner);
1069                         snprintf(reason,MAXBUF,"G-Lined: %s",r->reason);
1070                         userrec::QuitUser(ServerInstance, this, reason);
1071                         return;
1072                 }
1073
1074                 KLine* n = ServerInstance->XLines->matches_kline(this);
1075
1076                 if (n)
1077                 {
1078                         this->muted = true;
1079                         char reason[MAXBUF];
1080                         if (*ServerInstance->Config->MoronBanner)
1081                                 this->WriteServ("NOTICE %s :*** %s", this, ServerInstance->Config->MoronBanner);
1082                         snprintf(reason,MAXBUF,"K-Lined: %s",n->reason);
1083                         userrec::QuitUser(ServerInstance, this, reason);
1084                         return;
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                         return (ServerInstance->Parser->CallHandler("NICK", &newnick, 1, this) == CMD_SUCCESS);
1190                 }
1191                 return false;
1192         }
1193
1194         catch (...)
1195         {
1196                 ServerInstance->Log(DEBUG,"Exception in userrec::ForceNickChange()");
1197                 return false;
1198         }
1199 }
1200
1201 void userrec::SetSockAddr(int protocol_family, const char* ip, int port)
1202 {
1203         switch (protocol_family)
1204         {
1205 #ifdef SUPPORT_IP6LINKS
1206                 case AF_INET6:
1207                 {
1208                         sockaddr_in6* sin = new sockaddr_in6;
1209                         sin->sin6_family = AF_INET6;
1210                         sin->sin6_port = port;
1211                         inet_pton(AF_INET6, ip, &sin->sin6_addr);
1212                         this->ip = (sockaddr*)sin;
1213                 }
1214                 break;
1215 #endif
1216                 case AF_INET:
1217                 {
1218                         sockaddr_in* sin = new sockaddr_in;
1219                         sin->sin_family = AF_INET;
1220                         sin->sin_port = port;
1221                         inet_pton(AF_INET, ip, &sin->sin_addr);
1222                         this->ip = (sockaddr*)sin;
1223                 }
1224                 break;
1225                 default:
1226                         ServerInstance->Log(DEBUG,"Ut oh, I dont know protocol %d to be set on '%s'!", protocol_family, this->nick);
1227                 break;
1228         }
1229 }
1230
1231 int userrec::GetPort()
1232 {
1233         if (this->ip == NULL)
1234                 return 0;
1235
1236         switch (this->GetProtocolFamily())
1237         {
1238 #ifdef SUPPORT_IP6LINKS
1239                 case AF_INET6:
1240                 {
1241                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1242                         return sin->sin6_port;
1243                 }
1244                 break;
1245 #endif
1246                 case AF_INET:
1247                 {
1248                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1249                         return sin->sin_port;
1250                 }
1251                 break;
1252                 default:
1253                 break;
1254         }
1255         return 0;
1256 }
1257
1258 int userrec::GetProtocolFamily()
1259 {
1260         if (this->ip == NULL)
1261                 return 0;
1262
1263         sockaddr_in* sin = (sockaddr_in*)this->ip;
1264         return sin->sin_family;
1265 }
1266
1267 const char* userrec::GetIPString()
1268 {
1269         static char buf[1024];
1270
1271         if (this->ip == NULL)
1272                 return "";
1273
1274         switch (this->GetProtocolFamily())
1275         {
1276 #ifdef SUPPORT_IP6LINKS
1277                 case AF_INET6:
1278                 {
1279                         static char temp[1024];
1280
1281                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1282                         inet_ntop(sin->sin6_family, &sin->sin6_addr, buf, sizeof(buf));
1283                         /* IP addresses starting with a : on irc are a Bad Thing (tm) */
1284                         if (*buf == ':')
1285                         {
1286                                 strlcpy(&temp[1], buf, sizeof(temp) - 1);
1287                                 *temp = '0';
1288                                 return temp;
1289                         }
1290                         return buf;
1291                 }
1292                 break;
1293 #endif
1294                 case AF_INET:
1295                 {
1296                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1297                         inet_ntop(sin->sin_family, &sin->sin_addr, buf, sizeof(buf));
1298                         return buf;
1299                 }
1300                 break;
1301                 default:
1302                 break;
1303         }
1304         return "";
1305 }
1306
1307 const char* userrec::GetIPString(char* buf)
1308 {
1309         if (this->ip == NULL)
1310         {
1311                 *buf = 0;
1312                 return buf;
1313         }
1314
1315         switch (this->GetProtocolFamily())
1316         {
1317 #ifdef SUPPORT_IP6LINKS
1318                 case AF_INET6:
1319                 {
1320                         static char temp[1024];
1321
1322                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1323                         inet_ntop(sin->sin6_family, &sin->sin6_addr, buf, sizeof(buf));
1324                         /* IP addresses starting with a : on irc are a Bad Thing (tm) */
1325                         if (*buf == ':')
1326                         {
1327                                 strlcpy(&temp[1], buf, sizeof(temp) - 1);
1328                                 *temp = '0';
1329                                 strlcpy(buf, temp, sizeof(temp));
1330                         }
1331                         return buf;
1332                 }
1333                 break;
1334 #endif
1335                 case AF_INET:
1336                 {
1337                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1338                         inet_ntop(sin->sin_family, &sin->sin_addr, buf, sizeof(buf));
1339                         return buf;
1340                 }
1341                 break;
1342
1343                 default:
1344                 break;
1345         }
1346         return "";
1347 }
1348
1349 /** NOTE: We cannot pass a const reference to this method.
1350  * The string is changed by the workings of the method,
1351  * so that if we pass const ref, we end up copying it to
1352  * something we can change anyway. Makes sense to just let
1353  * the compiler do that copy for us.
1354  */
1355 void userrec::Write(std::string text)
1356 {
1357         if (!ServerInstance->SE->BoundsCheckFd(this))
1358                 return;
1359
1360         try
1361         {
1362                 /* ServerInstance->Log(DEBUG,"C[%d] <- %s", this->GetFd(), text.c_str());
1363                  * WARNING: The above debug line is VERY loud, do NOT
1364                  * enable it till we have a good way of filtering it
1365                  * out of the logs (e.g. 1.2 would be good).
1366                  */
1367                 text.append("\r\n");
1368         }
1369         catch (...)
1370         {
1371                 ServerInstance->Log(DEBUG,"Exception in userrec::Write() std::string::append");
1372                 return;
1373         }
1374
1375         if (ServerInstance->Config->GetIOHook(this->GetPort()))
1376         {
1377                 try
1378                 {
1379                         /* XXX: The lack of buffering here is NOT a bug, modules implementing this interface have to
1380                          * implement their own buffering mechanisms
1381                          */
1382                         ServerInstance->Config->GetIOHook(this->GetPort())->OnRawSocketWrite(this->fd, text.data(), text.length());
1383                 }
1384                 catch (CoreException& modexcept)
1385                 {
1386                         ServerInstance->Log(DEBUG, "%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
1387                 }
1388         }
1389         else
1390         {
1391                 this->AddWriteBuf(text);
1392         }
1393         ServerInstance->stats->statsSent += text.length();
1394         this->ServerInstance->SE->WantWrite(this);
1395 }
1396
1397 /** Write()
1398  */
1399 void userrec::Write(const char *text, ...)
1400 {
1401         va_list argsPtr;
1402         char textbuffer[MAXBUF];
1403
1404         va_start(argsPtr, text);
1405         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1406         va_end(argsPtr);
1407
1408         this->Write(std::string(textbuffer));
1409 }
1410
1411 void userrec::WriteServ(const std::string& text)
1412 {
1413         char textbuffer[MAXBUF];
1414
1415         snprintf(textbuffer,MAXBUF,":%s %s",ServerInstance->Config->ServerName,text.c_str());
1416         this->Write(std::string(textbuffer));
1417 }
1418
1419 /** WriteServ()
1420  *  Same as Write(), except `text' is prefixed with `:server.name '.
1421  */
1422 void userrec::WriteServ(const char* text, ...)
1423 {
1424         va_list argsPtr;
1425         char textbuffer[MAXBUF];
1426
1427         va_start(argsPtr, text);
1428         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1429         va_end(argsPtr);
1430
1431         this->WriteServ(std::string(textbuffer));
1432 }
1433
1434
1435 void userrec::WriteFrom(userrec *user, const std::string &text)
1436 {
1437         char tb[MAXBUF];
1438
1439         snprintf(tb,MAXBUF,":%s %s",user->GetFullHost(),text.c_str());
1440
1441         this->Write(std::string(tb));
1442 }
1443
1444
1445 /* write text from an originating user to originating user */
1446
1447 void userrec::WriteFrom(userrec *user, const char* text, ...)
1448 {
1449         va_list argsPtr;
1450         char textbuffer[MAXBUF];
1451
1452         va_start(argsPtr, text);
1453         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1454         va_end(argsPtr);
1455
1456         this->WriteFrom(user, std::string(textbuffer));
1457 }
1458
1459
1460 /* write text to an destination user from a source user (e.g. user privmsg) */
1461
1462 void userrec::WriteTo(userrec *dest, const char *data, ...)
1463 {
1464         char textbuffer[MAXBUF];
1465         va_list argsPtr;
1466
1467         va_start(argsPtr, data);
1468         vsnprintf(textbuffer, MAXBUF, data, argsPtr);
1469         va_end(argsPtr);
1470
1471         this->WriteTo(dest, std::string(textbuffer));
1472 }
1473
1474 void userrec::WriteTo(userrec *dest, const std::string &data)
1475 {
1476         dest->WriteFrom(this, data);
1477 }
1478
1479
1480 void userrec::WriteCommon(const char* text, ...)
1481 {
1482         char textbuffer[MAXBUF];
1483         va_list argsPtr;
1484
1485         if (this->registered != REG_ALL)
1486                 return;
1487
1488         va_start(argsPtr, text);
1489         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1490         va_end(argsPtr);
1491
1492         this->WriteCommon(std::string(textbuffer));
1493 }
1494
1495 void userrec::WriteCommon(const std::string &text)
1496 {
1497         try
1498         {
1499                 bool sent_to_at_least_one = false;
1500                 char tb[MAXBUF];
1501
1502                 if (this->registered != REG_ALL)
1503                         return;
1504
1505                 uniq_id++;
1506
1507                 /* We dont want to be doing this n times, just once */
1508                 snprintf(tb,MAXBUF,":%s %s",this->GetFullHost(),text.c_str());
1509                 std::string out = tb;
1510
1511                 for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1512                 {
1513                         CUList* ulist = v->first->GetUsers();
1514                         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1515                         {
1516                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1517                                 {
1518                                         already_sent[i->first->fd] = uniq_id;
1519                                         i->first->Write(out);
1520                                         sent_to_at_least_one = true;
1521                                 }
1522                         }
1523                 }
1524
1525                 /*
1526                  * if the user was not in any channels, no users will receive the text. Make sure the user
1527                  * receives their OWN message for WriteCommon
1528                  */
1529                 if (!sent_to_at_least_one)
1530                 {
1531                         this->Write(std::string(tb));
1532                 }
1533         }
1534
1535         catch (...)
1536         {
1537                 ServerInstance->Log(DEBUG,"Exception in userrec::WriteCommon()");
1538         }
1539 }
1540
1541
1542 /* write a formatted string to all users who share at least one common
1543  * channel, NOT including the source user e.g. for use in QUIT
1544  */
1545
1546 void userrec::WriteCommonExcept(const char* text, ...)
1547 {
1548         char textbuffer[MAXBUF];
1549         va_list argsPtr;
1550
1551         va_start(argsPtr, text);
1552         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1553         va_end(argsPtr);
1554
1555         this->WriteCommonExcept(std::string(textbuffer));
1556 }
1557
1558 void userrec::WriteCommonQuit(const std::string &normal_text, const std::string &oper_text)
1559 {
1560         char tb1[MAXBUF];
1561         char tb2[MAXBUF];
1562
1563         if (this->registered != REG_ALL)
1564                 return;
1565
1566         uniq_id++;
1567         snprintf(tb1,MAXBUF,":%s QUIT :%s",this->GetFullHost(),normal_text.c_str());
1568         snprintf(tb2,MAXBUF,":%s QUIT :%s",this->GetFullHost(),oper_text.c_str());
1569         std::string out1 = tb1;
1570         std::string out2 = tb2;
1571
1572         for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1573         {
1574                 CUList *ulist = v->first->GetUsers();
1575                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1576                 {
1577                         if (this != i->first)
1578                         {
1579                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1580                                 {
1581                                         already_sent[i->first->fd] = uniq_id;
1582                                         i->first->Write(IS_OPER(i->first) ? out2 : out1);
1583                                 }
1584                         }
1585                 }
1586         }
1587 }
1588
1589 void userrec::WriteCommonExcept(const std::string &text)
1590 {
1591         char tb1[MAXBUF];
1592         std::string out1;
1593
1594         if (this->registered != REG_ALL)
1595                 return;
1596
1597         uniq_id++;
1598         snprintf(tb1,MAXBUF,":%s %s",this->GetFullHost(),text.c_str());
1599         out1 = tb1;
1600
1601         for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1602         {
1603                 CUList *ulist = v->first->GetUsers();
1604                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1605                 {
1606                         if (this != i->first)
1607                         {
1608                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1609                                 {
1610                                         already_sent[i->first->fd] = uniq_id;
1611                                         i->first->Write(out1);
1612                                 }
1613                         }
1614                 }
1615         }
1616
1617 }
1618
1619 void userrec::WriteWallOps(const std::string &text)
1620 {
1621         if (!IS_OPER(this) && IS_LOCAL(this))
1622                 return;
1623
1624         std::string wallop("WALLOPS :");
1625         wallop.append(text);
1626
1627         for (std::vector<userrec*>::const_iterator i = ServerInstance->local_users.begin(); i != ServerInstance->local_users.end(); i++)
1628         {
1629                 userrec* t = *i;
1630                 if (t->IsModeSet('w'))
1631                         this->WriteTo(t,wallop);
1632         }
1633 }
1634
1635 void userrec::WriteWallOps(const char* text, ...)
1636 {
1637         char textbuffer[MAXBUF];
1638         va_list argsPtr;
1639
1640         va_start(argsPtr, text);
1641         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1642         va_end(argsPtr);
1643
1644         this->WriteWallOps(std::string(textbuffer));
1645 }
1646
1647 /* return 0 or 1 depending if users u and u2 share one or more common channels
1648  * (used by QUIT, NICK etc which arent channel specific notices)
1649  *
1650  * The old algorithm in 1.0 for this was relatively inefficient, iterating over
1651  * the first users channels then the second users channels within the outer loop,
1652  * therefore it was a maximum of x*y iterations (upon returning 0 and checking
1653  * all possible iterations). However this new function instead checks against the
1654  * channel's userlist in the inner loop which is a std::map<userrec*,userrec*>
1655  * and saves us time as we already know what pointer value we are after.
1656  * Don't quote me on the maths as i am not a mathematician or computer scientist,
1657  * but i believe this algorithm is now x+(log y) maximum iterations instead.
1658  */
1659 bool userrec::SharesChannelWith(userrec *other)
1660 {
1661         if ((!other) || (this->registered != REG_ALL) || (other->registered != REG_ALL))
1662                 return false;
1663
1664         /* Outer loop */
1665         for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1666         {
1667                 /* Eliminate the inner loop (which used to be ~equal in size to the outer loop)
1668                  * by replacing it with a map::find which *should* be more efficient
1669                  */
1670                 if (i->first->HasUser(other))
1671                         return true;
1672         }
1673         return false;
1674 }
1675
1676 bool userrec::ChangeName(const char* gecos)
1677 {
1678         if (!strcmp(gecos, this->fullname))
1679                 return true;
1680
1681         if (IS_LOCAL(this))
1682         {
1683                 int MOD_RESULT = 0;
1684                 FOREACH_RESULT(I_OnChangeLocalUserGECOS,OnChangeLocalUserGECOS(this,gecos));
1685                 if (MOD_RESULT)
1686                         return false;
1687                 FOREACH_MOD(I_OnChangeName,OnChangeName(this,gecos));
1688         }
1689         strlcpy(this->fullname,gecos,MAXGECOS+1);
1690
1691         return true;
1692 }
1693
1694 bool userrec::ChangeDisplayedHost(const char* host)
1695 {
1696         if (!strcmp(host, this->dhost))
1697                 return true;
1698
1699         if (IS_LOCAL(this))
1700         {
1701                 int MOD_RESULT = 0;
1702                 FOREACH_RESULT(I_OnChangeLocalUserHost,OnChangeLocalUserHost(this,host));
1703                 if (MOD_RESULT)
1704                         return false;
1705                 FOREACH_MOD(I_OnChangeHost,OnChangeHost(this,host));
1706         }
1707         if (this->ServerInstance->Config->CycleHosts)
1708                 this->WriteCommonExcept("QUIT :Changing hosts");
1709
1710         /* Fix by Om: userrec::dhost is 65 long, this was truncating some long hosts */
1711         strlcpy(this->dhost,host,64);
1712
1713         this->InvalidateCache();
1714
1715         if (this->ServerInstance->Config->CycleHosts)
1716         {
1717                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1718                 {
1719                         i->first->WriteAllExceptSender(this, false, 0, "JOIN %s", i->first->name);
1720                         std::string n = this->ServerInstance->Modes->ModeString(this, i->first);
1721                         if (n.length() > 0)
1722                                 i->first->WriteAllExceptSender(this, true, 0, "MODE %s +%s", i->first->name, n.c_str());
1723                 }
1724         }
1725
1726         if (IS_LOCAL(this))
1727                 this->WriteServ("396 %s %s :is now your displayed host",this->nick,this->dhost);
1728
1729         return true;
1730 }
1731
1732 bool userrec::ChangeIdent(const char* newident)
1733 {
1734         if (!strcmp(newident, this->ident))
1735                 return true;
1736
1737         if (this->ServerInstance->Config->CycleHosts)
1738                 this->WriteCommonExcept("%s","QUIT :Changing ident");
1739
1740         strlcpy(this->ident, newident, IDENTMAX+2);
1741
1742         this->InvalidateCache();
1743
1744         if (this->ServerInstance->Config->CycleHosts)
1745         {
1746                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1747                 {
1748                         i->first->WriteAllExceptSender(this, false, 0, "JOIN %s", i->first->name);
1749                         std::string n = this->ServerInstance->Modes->ModeString(this, i->first);
1750                         if (n.length() > 0)
1751                                 i->first->WriteAllExceptSender(this, true, 0, "MODE %s +%s", i->first->name, n.c_str());
1752                 }
1753         }
1754
1755         return true;
1756 }
1757
1758 void userrec::SendAll(const char* command, char* text, ...)
1759 {
1760         char textbuffer[MAXBUF];
1761         char formatbuffer[MAXBUF];
1762         va_list argsPtr;
1763
1764         va_start(argsPtr, text);
1765         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1766         va_end(argsPtr);
1767
1768         snprintf(formatbuffer,MAXBUF,":%s %s $* :%s", this->GetFullHost(), command, textbuffer);
1769         std::string fmt = formatbuffer;
1770
1771         for (std::vector<userrec*>::const_iterator i = ServerInstance->local_users.begin(); i != ServerInstance->local_users.end(); i++)
1772         {
1773                 (*i)->Write(fmt);
1774         }
1775 }
1776
1777
1778 std::string userrec::ChannelList(userrec* source)
1779 {
1780         try
1781         {
1782                 std::string list;
1783                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1784                 {
1785                         /* If the target is the same as the sender, let them see all their channels.
1786                          * If the channel is NOT private/secret OR the user shares a common channel
1787                          * If the user is an oper, and the <options:operspywhois> option is set.
1788                          */
1789                         if ((source == this) || (IS_OPER(source) && ServerInstance->Config->OperSpyWhois) || (((!i->first->IsModeSet('p')) && (!i->first->IsModeSet('s'))) || (i->first->HasUser(source))))
1790                         {
1791                                 list.append(i->first->GetPrefixChar(this)).append(i->first->name).append(" ");
1792                         }
1793                 }
1794                 return list;
1795         }
1796         catch (...)
1797         {
1798                 ServerInstance->Log(DEBUG,"Exception in userrec::ChannelList()");
1799                 return "";
1800         }
1801 }
1802
1803 void userrec::SplitChanList(userrec* dest, const std::string &cl)
1804 {
1805         std::string line;
1806         std::ostringstream prefix;
1807         std::string::size_type start, pos, length;
1808
1809         try
1810         {
1811                 prefix << this->nick << " " << dest->nick << " :";
1812                 line = prefix.str();
1813                 int namelen = strlen(ServerInstance->Config->ServerName) + 6;
1814
1815                 for (start = 0; (pos = cl.find(' ', start)) != std::string::npos; start = pos+1)
1816                 {
1817                         length = (pos == std::string::npos) ? cl.length() : pos;
1818
1819                         if (line.length() + namelen + length - start > 510)
1820                         {
1821                                 ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1822                                 line = prefix.str();
1823                         }
1824
1825                         if(pos == std::string::npos)
1826                         {
1827                                 line.append(cl.substr(start, length - start));
1828                                 break;
1829                         }
1830                         else
1831                         {
1832                                 line.append(cl.substr(start, length - start + 1));
1833                         }
1834                 }
1835
1836                 if (line.length())
1837                 {
1838                         ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1839                 }
1840         }
1841
1842         catch (...)
1843         {
1844                 ServerInstance->Log(DEBUG,"Exception in userrec::SplitChanList()");
1845         }
1846 }
1847
1848
1849 /* looks up a users password for their connection class (<ALLOW>/<DENY> tags)
1850  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1851  * then their ip will be taken as 'priority' anyway, so for example,
1852  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1853  */
1854 ConnectClass* userrec::GetClass()
1855 {
1856         for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1857         {
1858                 if (((match(this->GetIPString(),i->GetHost().c_str(),true)) || (match(this->host,i->GetHost().c_str()))))
1859                 {
1860                         if (i->GetPort())
1861                         {
1862                                 if (this->GetPort() == i->GetPort())
1863                                         return &(*i);
1864                                 else
1865                                         continue;
1866                         }
1867                         else
1868                                 return &(*i);
1869                 }
1870         }
1871         return NULL;
1872 }
1873
1874 void userrec::PurgeEmptyChannels()
1875 {
1876         std::vector<chanrec*> to_delete;
1877
1878         // firstly decrement the count on each channel
1879         for (UCListIter f = this->chans.begin(); f != this->chans.end(); f++)
1880         {
1881                 f->first->RemoveAllPrefixes(this);
1882                 if (f->first->DelUser(this) == 0)
1883                 {
1884                         /* No users left in here, mark it for deletion */
1885                         try
1886                         {
1887                                 to_delete.push_back(f->first);
1888                         }
1889                         catch (...)
1890                         {
1891                                 ServerInstance->Log(DEBUG,"Exception in userrec::PurgeEmptyChannels to_delete.push_back()");
1892                         }
1893                 }
1894         }
1895
1896         for (std::vector<chanrec*>::iterator n = to_delete.begin(); n != to_delete.end(); n++)
1897         {
1898                 chanrec* thischan = *n;
1899                 chan_hash::iterator i2 = ServerInstance->chanlist->find(thischan->name);
1900                 if (i2 != ServerInstance->chanlist->end())
1901                 {
1902                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(i2->second));
1903                         DELETE(i2->second);
1904                         ServerInstance->chanlist->erase(i2);
1905                         this->chans.erase(*n);
1906                 }
1907         }
1908
1909         this->UnOper();
1910 }
1911
1912 void userrec::ShowMOTD()
1913 {
1914         if (!ServerInstance->Config->MOTD.size())
1915         {
1916                 this->WriteServ("422 %s :Message of the day file is missing.",this->nick);
1917                 return;
1918         }
1919         this->WriteServ("375 %s :%s message of the day", this->nick, ServerInstance->Config->ServerName);
1920
1921         for (file_cache::iterator i = ServerInstance->Config->MOTD.begin(); i != ServerInstance->Config->MOTD.end(); i++)
1922                 this->WriteServ("372 %s :- %s",this->nick,i->c_str());
1923
1924         this->WriteServ("376 %s :End of message of the day.", this->nick);
1925 }
1926
1927 void userrec::ShowRULES()
1928 {
1929         if (!ServerInstance->Config->RULES.size())
1930         {
1931                 this->WriteServ("434 %s :RULES File is missing",this->nick);
1932                 return;
1933         }
1934
1935         this->WriteServ("308 %s :- %s Server Rules -",this->nick,ServerInstance->Config->ServerName);
1936
1937         for (file_cache::iterator i = ServerInstance->Config->RULES.begin(); i != ServerInstance->Config->RULES.end(); i++)
1938                 this->WriteServ("232 %s :- %s",this->nick,i->c_str());
1939
1940         this->WriteServ("309 %s :End of RULES command.",this->nick);
1941 }
1942
1943 void userrec::HandleEvent(EventType et, int errornum)
1944 {
1945         /* WARNING: May delete this user! */
1946         int thisfd = this->GetFd();
1947
1948         try
1949         {
1950                 switch (et)
1951                 {
1952                         case EVENT_READ:
1953                                 ServerInstance->ProcessUser(this);
1954                         break;
1955                         case EVENT_WRITE:
1956                                 this->FlushWriteBuf();
1957                         break;
1958                         case EVENT_ERROR:
1959                                 /** This should be safe, but dont DARE do anything after it -- Brain */
1960                                 this->SetWriteError(errornum ? strerror(errornum) : "EOF from client");
1961                         break;
1962                 }
1963         }
1964         catch (...)
1965         {
1966                 ServerInstance->Log(DEBUG,"Exception in userrec::HandleEvent intercepted");
1967         }
1968
1969         /* If the user has raised an error whilst being processed, quit them now we're safe to */
1970         if ((ServerInstance->SE->GetRef(thisfd) == this))
1971         {
1972                 if (!WriteError.empty())
1973                 {
1974                         userrec::QuitUser(ServerInstance, this, GetWriteError());
1975                 }
1976         }
1977 }
1978
1979 void userrec::SetOperQuit(const std::string &oquit)
1980 {
1981         if (operquit)
1982                 return;
1983
1984         operquit = strdup(oquit.c_str());
1985 }
1986
1987 const char* userrec::GetOperQuit()
1988 {
1989         return operquit ? operquit : "";
1990 }
1991
1992 VisData::VisData()
1993 {
1994 }
1995
1996 VisData::~VisData()
1997 {
1998 }
1999
2000 bool VisData::VisibleTo(userrec* user)
2001 {
2002         return true;
2003 }
2004