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, int resultnum)
 168 {
 169         /* We are only interested in the first matching result */
 170         if (resultnum)
 171                 return;
 172
 173         if ((!this->fwd) && (ServerInstance->SE->GetRef(this->bound_fd) == this->bound_user))
 174         {
 175                 this->bound_user->stored_host = result;
 176                 try
 177                 {
 178                         /* Check we didnt time out */
 179                         if (this->bound_user->registered != REG_ALL)
 180                         {
 181                                 bool cached;
 182 #ifdef IPV6
 183                                 if (this->bound_user->GetProtocolFamily() == AF_INET6)
 184                                 {
 185                                         /* IPV6 forward lookup (with possibility of 4in6) */
 186                                         const char* ip = this->bound_user->GetIPString();
 187                                         bound_user->res_forward = new UserResolver(this->ServerInstance, this->bound_user, result, (!strncmp(ip, "0::ffff:", 8) ? DNS_QUERY_A : DNS_QUERY_AAAA), cached);
 188                                 }
 189                                 else
 190                                         /* IPV4 lookup (mixed protocol mode) */
 191 #endif
 192                                 /* IPV4 lookup (ipv4 only mode) */
 193                                 bound_user->res_forward = new UserResolver(this->ServerInstance, this->bound_user, result, DNS_QUERY_A, cached);
 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.insert(0, "0");
 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.clear();
 338         sendq.clear();
 339         WriteError.clear();
 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 void userrec::RemoveCloneCounts()
 352 {
 353         clonemap::iterator x = ServerInstance->local_clones.find(this->GetIPString());
 354         if (x != ServerInstance->local_clones.end())
 355         {
 356                 x->second--;
 357                 if (!x->second)
 358                 {
 359                         ServerInstance->local_clones.erase(x);
 360                 }
 361         }
 362
 363         clonemap::iterator y = ServerInstance->global_clones.find(this->GetIPString());
 364         if (y != ServerInstance->global_clones.end())
 365         {
 366                 y->second--;
 367                 if (!y->second)
 368                 {
 369                         ServerInstance->global_clones.erase(y);
 370                 }
 371         }
 372 }
 373
 374 userrec::~userrec()
 375 {
 376         this->InvalidateCache();
 377         this->DecrementModes();
 378         if (operquit)
 379                 free(operquit);
 380         if (ip)
 381         {
 382                 this->RemoveCloneCounts();
 383
 384                 if (this->GetProtocolFamily() == AF_INET)
 385                 {
 386                         delete (sockaddr_in*)ip;
 387                 }
 388 #ifdef SUPPORT_IP6LINKS
 389                 else
 390                 {
 391                         delete (sockaddr_in6*)ip;
 392                 }
 393 #endif
 394         }
 395 }
 396
 397 char* userrec::MakeHost()
 398 {
 399         if (this->cached_makehost)
 400                 return this->cached_makehost;
 401
 402         char nhost[MAXBUF];
 403         /* This is much faster than snprintf */
 404         char* t = nhost;
 405         for(char* n = ident; *n; n++)
 406                 *t++ = *n;
 407         *t++ = '@';
 408         for(char* n = host; *n; n++)
 409                 *t++ = *n;
 410         *t = 0;
 411
 412         this->cached_makehost = strdup(nhost);
 413
 414         return this->cached_makehost;
 415 }
 416
 417 char* userrec::MakeHostIP()
 418 {
 419         if (this->cached_hostip)
 420                 return this->cached_hostip;
 421
 422         char ihost[MAXBUF];
 423         /* This is much faster than snprintf */
 424         char* t = ihost;
 425         for(char* n = ident; *n; n++)
 426                 *t++ = *n;
 427         *t++ = '@';
 428         for(const char* n = this->GetIPString(); *n; n++)
 429                 *t++ = *n;
 430         *t = 0;
 431
 432         this->cached_hostip = strdup(ihost);
 433
 434         return this->cached_hostip;
 435 }
 436
 437 void userrec::CloseSocket()
 438 {
 439         ServerInstance->SE->Shutdown(this, 2);
 440         ServerInstance->SE->Close(this);
 441 }
 442
 443 char* userrec::GetFullHost()
 444 {
 445         if (this->cached_fullhost)
 446                 return this->cached_fullhost;
 447
 448         char result[MAXBUF];
 449         char* t = result;
 450         for(char* n = nick; *n; n++)
 451                 *t++ = *n;
 452         *t++ = '!';
 453         for(char* n = ident; *n; n++)
 454                 *t++ = *n;
 455         *t++ = '@';
 456         for(char* n = dhost; *n; n++)
 457                 *t++ = *n;
 458         *t = 0;
 459
 460         this->cached_fullhost = strdup(result);
 461
 462         return this->cached_fullhost;
 463 }
 464
 465 char* userrec::MakeWildHost()
 466 {
 467         static char nresult[MAXBUF];
 468         char* t = nresult;
 469         *t++ = '*';     *t++ = '!';
 470         *t++ = '*';     *t++ = '@';
 471         for(char* n = dhost; *n; n++)
 472                 *t++ = *n;
 473         *t = 0;
 474         return nresult;
 475 }
 476
 477 int userrec::ReadData(void* buffer, size_t size)
 478 {
 479         if (IS_LOCAL(this))
 480         {
 481 #ifndef WIN32
 482                 return read(this->fd, buffer, size);
 483 #else
 484                 return recv(this->fd, (char*)buffer, size, 0);
 485 #endif
 486         }
 487         else
 488                 return 0;
 489 }
 490
 491
 492 char* userrec::GetFullRealHost()
 493 {
 494         if (this->cached_fullrealhost)
 495                 return this->cached_fullrealhost;
 496
 497         char fresult[MAXBUF];
 498         char* t = fresult;
 499         for(char* n = nick; *n; n++)
 500                 *t++ = *n;
 501         *t++ = '!';
 502         for(char* n = ident; *n; n++)
 503                 *t++ = *n;
 504         *t++ = '@';
 505         for(char* n = host; *n; n++)
 506                 *t++ = *n;
 507         *t = 0;
 508
 509         this->cached_fullrealhost = strdup(fresult);
 510
 511         return this->cached_fullrealhost;
 512 }
 513
 514 bool userrec::IsInvited(const irc::string &channel)
 515 {
 516         for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 517         {
 518                 if (channel == *i)
 519                 {
 520                         return true;
 521                 }
 522         }
 523         return false;
 524 }
 525
 526 InvitedList* userrec::GetInviteList()
 527 {
 528         return &invites;
 529 }
 530
 531 void userrec::InviteTo(const irc::string &channel)
 532 {
 533         invites.push_back(channel);
 534 }
 535
 536 void userrec::RemoveInvite(const irc::string &channel)
 537 {
 538         for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 539         {
 540                 if (channel == *i)
 541                 {
 542                         invites.erase(i);
 543                         return;
 544                 }
 545         }
 546 }
 547
 548 bool userrec::HasPermission(const std::string &command)
 549 {
 550         char* mycmd;
 551         char* savept;
 552         char* savept2;
 553
 554         /*
 555          * users on remote servers can completely bypass all permissions based checks.
 556          * This prevents desyncs when one server has different type/class tags to another.
 557          * That having been said, this does open things up to the possibility of source changes
 558          * allowing remote kills, etc - but if they have access to the src, they most likely have
 559          * access to the conf - so it's an end to a means either way.
 560          */
 561         if (!IS_LOCAL(this))
 562                 return true;
 563
 564         // are they even an oper at all?
 565         if (IS_OPER(this))
 566         {
 567                 opertype_t::iterator iter_opertype = ServerInstance->Config->opertypes.find(this->oper);
 568                 if (iter_opertype != ServerInstance->Config->opertypes.end())
 569                 {
 570                         char* Classes = strdup(iter_opertype->second);
 571                         char* myclass = strtok_r(Classes," ",&savept);
 572                         while (myclass)
 573                         {
 574                                 operclass_t::iterator iter_operclass = ServerInstance->Config->operclass.find(myclass);
 575                                 if (iter_operclass != ServerInstance->Config->operclass.end())
 576                                 {
 577                                         char* CommandList = strdup(iter_operclass->second);
 578                                         mycmd = strtok_r(CommandList," ",&savept2);
 579                                         while (mycmd)
 580                                         {
 581                                                 if ((!strcasecmp(mycmd,command.c_str())) || (*mycmd == '*'))
 582                                                 {
 583                                                         free(Classes);
 584                                                         free(CommandList);
 585                                                         return true;
 586                                                 }
 587                                                 mycmd = strtok_r(NULL," ",&savept2);
 588                                         }
 589                                         free(CommandList);
 590                                 }
 591                                 myclass = strtok_r(NULL," ",&savept);
 592                         }
 593                         free(Classes);
 594                 }
 595         }
 596         return false;
 597 }
 598
 599 /** NOTE: We cannot pass a const reference to this method.
 600  * The string is changed by the workings of the method,
 601  * so that if we pass const ref, we end up copying it to
 602  * something we can change anyway. Makes sense to just let
 603  * the compiler do that copy for us.
 604  */
 605 bool userrec::AddBuffer(std::string a)
 606 {
 607         try
 608         {
 609                 std::string::size_type i = a.rfind('\r');
 610
 611                 while (i != std::string::npos)
 612                 {
 613                         a.erase(i, 1);
 614                         i = a.rfind('\r');
 615                 }
 616
 617                 if (a.length())
 618                         recvq.append(a);
 619
 620                 if (recvq.length() > (unsigned)this->recvqmax)
 621                 {
 622                         this->SetWriteError("RecvQ exceeded");
 623                         ServerInstance->WriteOpers("*** User %s RecvQ of %d exceeds connect class maximum of %d",this->nick,recvq.length(),this->recvqmax);
 624                         return false;
 625                 }
 626
 627                 return true;
 628         }
 629
 630         catch (...)
 631         {
 632                 ServerInstance->Log(DEBUG,"Exception in userrec::AddBuffer()");
 633                 return false;
 634         }
 635 }
 636
 637 bool userrec::BufferIsReady()
 638 {
 639         return (recvq.find('\n') != std::string::npos);
 640 }
 641
 642 void userrec::ClearBuffer()
 643 {
 644         recvq.clear();
 645 }
 646
 647 std::string userrec::GetBuffer()
 648 {
 649         try
 650         {
 651                 if (!recvq.length())
 652                         return "";
 653
 654                 /* Strip any leading \r or \n off the string.
 655                  * Usually there are only one or two of these,
 656                  * so its is computationally cheap to do.
 657                  */
 658                 std::string::iterator t = recvq.begin();
 659                 while (t != recvq.end() && (*t == '\r' || *t == '\n'))
 660                 {
 661                         recvq.erase(t);
 662                         t = recvq.begin();
 663                 }
 664
 665                 for (std::string::iterator x = recvq.begin(); x != recvq.end(); x++)
 666                 {
 667                         /* Find the first complete line, return it as the
 668                          * result, and leave the recvq as whats left
 669                          */
 670                         if (*x == '\n')
 671                         {
 672                                 std::string ret = std::string(recvq.begin(), x);
 673                                 recvq.erase(recvq.begin(), x + 1);
 674                                 return ret;
 675                         }
 676                 }
 677                 return "";
 678         }
 679
 680         catch (...)
 681         {
 682                 ServerInstance->Log(DEBUG,"Exception in userrec::GetBuffer()");
 683                 return "";
 684         }
 685 }
 686
 687 void userrec::AddWriteBuf(const std::string &data)
 688 {
 689         if (*this->GetWriteError())
 690                 return;
 691
 692         if (sendq.length() + data.length() > (unsigned)this->sendqmax)
 693         {
 694                 /*
 695                  * Fix by brain - Set the error text BEFORE calling writeopers, because
 696                  * if we dont it'll recursively  call here over and over again trying
 697                  * to repeatedly add the text to the sendq!
 698                  */
 699                 this->SetWriteError("SendQ exceeded");
 700                 ServerInstance->WriteOpers("*** User %s SendQ of %d exceeds connect class maximum of %d",this->nick,sendq.length() + data.length(),this->sendqmax);
 701                 return;
 702         }
 703
 704         try
 705         {
 706                 if (data.length() > MAXBUF - 2) /* MAXBUF has a value of 514, to account for line terminators */
 707                         sendq.append(data.substr(0,MAXBUF - 4)).append("\r\n"); /* MAXBUF-4 = 510 */
 708                 else
 709                         sendq.append(data);
 710         }
 711         catch (...)
 712         {
 713                 this->SetWriteError("SendQ exceeded");
 714                 ServerInstance->WriteOpers("*** User %s SendQ got an exception",this->nick);
 715         }
 716 }
 717
 718 // send AS MUCH OF THE USERS SENDQ as we are able to (might not be all of it)
 719 void userrec::FlushWriteBuf()
 720 {
 721         try
 722         {
 723                 if ((this->fd == FD_MAGIC_NUMBER) || (*this->GetWriteError()))
 724                 {
 725                         sendq.clear();
 726                 }
 727                 if ((sendq.length()) && (this->fd != FD_MAGIC_NUMBER))
 728                 {
 729                         int old_sendq_length = sendq.length();
 730                         int n_sent = ServerInstance->SE->Send(this, this->sendq.data(), this->sendq.length(), 0);
 731
 732                         if (n_sent == -1)
 733                         {
 734                                 if (errno == EAGAIN)
 735                                 {
 736                                         /* The socket buffer is full. This isnt fatal,
 737                                          * try again later.
 738                                          */
 739                                         this->ServerInstance->SE->WantWrite(this);
 740                                 }
 741                                 else
 742                                 {
 743                                         /* Fatal error, set write error and bail
 744                                          */
 745                                         this->SetWriteError(errno ? strerror(errno) : "EOF from client");
 746                                         return;
 747                                 }
 748                         }
 749                         else
 750                         {
 751                                 /* advance the queue */
 752                                 if (n_sent)
 753                                         this->sendq = this->sendq.substr(n_sent);
 754                                 /* update the user's stats counters */
 755                                 this->bytes_out += n_sent;
 756                                 this->cmds_out++;
 757                                 if (n_sent != old_sendq_length)
 758                                         this->ServerInstance->SE->WantWrite(this);
 759                         }
 760                 }
 761         }
 762
 763         catch (...)
 764         {
 765                 ServerInstance->Log(DEBUG,"Exception in userrec::FlushWriteBuf()");
 766         }
 767
 768         if (this->sendq.empty())
 769         {
 770                 FOREACH_MOD(I_OnBufferFlushed,OnBufferFlushed(this));
 771         }
 772 }
 773
 774 void userrec::SetWriteError(const std::string &error)
 775 {
 776         try
 777         {
 778                 // don't try to set the error twice, its already set take the first string.
 779                 if (this->WriteError.empty())
 780                         this->WriteError = error;
 781         }
 782
 783         catch (...)
 784         {
 785                 ServerInstance->Log(DEBUG,"Exception in userrec::SetWriteError()");
 786         }
 787 }
 788
 789 const char* userrec::GetWriteError()
 790 {
 791         return this->WriteError.c_str();
 792 }
 793
 794 void userrec::Oper(const std::string &opertype)
 795 {
 796         try
 797         {
 798                 this->modes[UM_OPERATOR] = 1;
 799                 this->WriteServ("MODE %s :+o", this->nick);
 800                 FOREACH_MOD(I_OnOper, OnOper(this, opertype));
 801                 ServerInstance->Log(DEFAULT,"OPER: %s!%s@%s opered as type: %s", this->nick, this->ident, this->host, opertype.c_str());
 802                 strlcpy(this->oper, opertype.c_str(), NICKMAX - 1);
 803                 ServerInstance->all_opers.push_back(this);
 804                 FOREACH_MOD(I_OnPostOper,OnPostOper(this, opertype));
 805         }
 806
 807         catch (...)
 808         {
 809                 ServerInstance->Log(DEBUG,"Exception in userrec::Oper()");
 810         }
 811 }
 812
 813 void userrec::UnOper()
 814 {
 815         try
 816         {
 817                 if (IS_OPER(this))
 818                 {
 819                         // unset their oper type (what IS_OPER checks), and remove +o
 820                         *this->oper = 0;
 821                         this->modes[UM_OPERATOR] = 0;
 822
 823                         // remove them from the opers list.
 824                         for (std::vector<userrec*>::iterator a = ServerInstance->all_opers.begin(); a < ServerInstance->all_opers.end(); a++)
 825                         {
 826                                 if (*a == this)
 827                                 {
 828                                         ServerInstance->all_opers.erase(a);
 829                                         return;
 830                                 }
 831                         }
 832                 }
 833         }
 834
 835         catch (...)
 836         {
 837                 ServerInstance->Log(DEBUG,"Exception in userrec::UnOper()");
 838         }
 839 }
 840
 841 void userrec::QuitUser(InspIRCd* Instance, userrec *user, const std::string &quitreason, const char* operreason)
 842 {
 843         user->muted = true;
 844         Instance->GlobalCulls.AddItem(user, quitreason.c_str(), operreason);
 845 }
 846
 847 /* adds or updates an entry in the whowas list */
 848 void userrec::AddToWhoWas()
 849 {
 850         command_t* whowas_command = ServerInstance->Parser->GetHandler("WHOWAS");
 851         if (whowas_command)
 852         {
 853                 std::deque<classbase*> params;
 854                 params.push_back(this);
 855                 whowas_command->HandleInternal(WHOWAS_ADD, params);
 856         }
 857 }
 858
 859 /* add a client connection to the sockets list */
 860 void userrec::AddClient(InspIRCd* Instance, int socket, int port, bool iscached, int socketfamily, sockaddr* ip)
 861 {
 862         std::string tempnick = ConvToStr(socket) + "-unknown";
 863         user_hash::iterator iter = Instance->clientlist->find(tempnick);
 864         char ipaddr[MAXBUF];
 865 #ifdef IPV6
 866         if (socketfamily == AF_INET6)
 867                 inet_ntop(AF_INET6, &((const sockaddr_in6*)ip)->sin6_addr, ipaddr, sizeof(ipaddr));
 868         else
 869 #endif
 870         inet_ntop(AF_INET, &((const sockaddr_in*)ip)->sin_addr, ipaddr, sizeof(ipaddr));
 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         /*
 928          * Check connect class settings and initialise settings into userrec.
 929          * This will be done again after DNS resolution. -- w00t
 930          */
 931         New->CheckClass();
 932
 933         Instance->local_users.push_back(New);
 934
 935         if ((Instance->local_users.size() > Instance->Config->SoftLimit) || (Instance->local_users.size() >= MAXCLIENTS))
 936         {
 937                 Instance->WriteOpers("*** Warning: softlimit value has been reached: %d clients", Instance->Config->SoftLimit);
 938                 userrec::QuitUser(Instance, New,"No more connections allowed");
 939                 return;
 940         }
 941
 942         /*
 943          * XXX -
 944          * this is done as a safety check to keep the file descriptors within range of fd_ref_table.
 945          * its a pretty big but for the moment valid assumption:
 946          * file descriptors are handed out starting at 0, and are recycled as theyre freed.
 947          * therefore if there is ever an fd over 65535, 65536 clients must be connected to the
 948          * irc server at once (or the irc server otherwise initiating this many connections, files etc)
 949          * which for the time being is a physical impossibility (even the largest networks dont have more
 950          * than about 10,000 users on ONE server!)
 951          */
 952 #ifndef WINDOWS
 953         if ((unsigned int)socket >= MAX_DESCRIPTORS)
 954         {
 955                 userrec::QuitUser(Instance, New, "Server is full");
 956                 return;
 957         }
 958 #endif
 959
 960         New->exempt = (Instance->XLines->matches_exception(New) != NULL);
 961         if (!New->exempt)
 962         {
 963                 ZLine* r = Instance->XLines->matches_zline(ipaddr);
 964                 if (r)
 965                 {
 966                         char reason[MAXBUF];
 967                         if (*Instance->Config->MoronBanner)
 968                                 New->WriteServ("NOTICE %s :*** %s", New->nick, Instance->Config->MoronBanner);
 969                         snprintf(reason,MAXBUF,"Z-Lined: %s",r->reason);
 970                         userrec::QuitUser(Instance, New, reason);
 971                         return;
 972                 }
 973         }
 974
 975         if (socket > -1)
 976         {
 977                 if (!Instance->SE->AddFd(New))
 978                 {
 979                         userrec::QuitUser(Instance, New, "Internal error handling connection");
 980                         return;
 981                 }
 982         }
 983
 984         /* NOTE: even if dns lookups are *off*, we still need to display this.
 985          * BOPM and other stuff requires it.
 986          */
 987         New->WriteServ("NOTICE Auth :*** Looking up your hostname...");
 988 }
 989
 990 unsigned long userrec::GlobalCloneCount()
 991 {
 992         clonemap::iterator x = ServerInstance->global_clones.find(this->GetIPString());
 993         if (x != ServerInstance->global_clones.end())
 994                 return x->second;
 995         else
 996                 return 0;
 997 }
 998
 999 unsigned long userrec::LocalCloneCount()
1000 {
1001         clonemap::iterator x = ServerInstance->local_clones.find(this->GetIPString());
1002         if (x != ServerInstance->local_clones.end())
1003                 return x->second;
1004         else
1005                 return 0;
1006 }
1007
1008 /*
1009  * Check class restrictions
1010  */
1011 void userrec::CheckClass(const std::string &explicit_class)
1012 {
1013         ConnectClass* a = this->GetClass(explicit_class);
1014
1015         if ((!a) || (a->GetType() == CC_DENY))
1016         {
1017                 userrec::QuitUser(ServerInstance, this, "Unauthorised connection");
1018                 return;
1019         }
1020         else if ((a->GetMaxLocal()) && (this->LocalCloneCount() > a->GetMaxLocal()))
1021         {
1022                 userrec::QuitUser(ServerInstance, this, "No more connections allowed from your host via this connect class (local)");
1023                 ServerInstance->WriteOpers("*** WARNING: maximum LOCAL connections (%ld) exceeded for IP %s", a->GetMaxLocal(), this->GetIPString());
1024                 return;
1025         }
1026         else if ((a->GetMaxGlobal()) && (this->GlobalCloneCount() > a->GetMaxGlobal()))
1027         {
1028                 userrec::QuitUser(ServerInstance, this, "No more connections allowed from your host via this connect class (global)");
1029                 ServerInstance->WriteOpers("*** WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s", a->GetMaxGlobal(), this->GetIPString());
1030                 return;
1031         }
1032
1033         this->pingmax = a->GetPingTime();
1034         this->nping = ServerInstance->Time() + a->GetPingTime() + ServerInstance->Config->dns_timeout;
1035         this->timeout = ServerInstance->Time() + a->GetRegTimeout();
1036         this->flood = a->GetFlood();
1037         this->threshold = a->GetThreshold();
1038         this->sendqmax = a->GetSendqMax();
1039         this->recvqmax = a->GetRecvqMax();
1040         this->MaxChans = a->GetMaxChans();
1041 }
1042
1043 void userrec::FullConnect()
1044 {
1045         ServerInstance->stats->statsConnects++;
1046         this->idle_lastmsg = ServerInstance->Time();
1047
1048         /*
1049          * You may be thinking "wtf, we checked this in userrec::AddClient!" - and yes, we did, BUT.
1050          * At the time AddClient is called, we don't have a resolved host, by here we probably do - which
1051          * may put the user into a totally seperate class with different restrictions! so we *must* check again.
1052          * Don't remove this! -- w00t
1053          */
1054         this->CheckClass();
1055
1056         /* Check the password, if one is required by the user's connect class.
1057          * This CANNOT be in CheckClass(), because that is called prior to PASS as well!
1058          */
1059         if ((!this->GetClass()->GetPass().empty()) && (!this->haspassed))
1060         {
1061                 userrec::QuitUser(ServerInstance, this, "Invalid password");
1062                 return;
1063         }
1064
1065         if (!this->exempt)
1066         {
1067                 GLine* r = ServerInstance->XLines->matches_gline(this);
1068
1069                 if (r)
1070                 {
1071                         this->muted = true;
1072                         char reason[MAXBUF];
1073                         if (*ServerInstance->Config->MoronBanner)
1074                                 this->WriteServ("NOTICE %s :*** %s", this->nick, ServerInstance->Config->MoronBanner);
1075                         snprintf(reason,MAXBUF,"G-Lined: %s",r->reason);
1076                         userrec::QuitUser(ServerInstance, this, reason);
1077                         return;
1078                 }
1079
1080                 KLine* n = ServerInstance->XLines->matches_kline(this);
1081
1082                 if (n)
1083                 {
1084                         this->muted = true;
1085                         char reason[MAXBUF];
1086                         if (*ServerInstance->Config->MoronBanner)
1087                                 this->WriteServ("NOTICE %s :*** %s", this, ServerInstance->Config->MoronBanner);
1088                         snprintf(reason,MAXBUF,"K-Lined: %s",n->reason);
1089                         userrec::QuitUser(ServerInstance, this, reason);
1090                         return;
1091                 }
1092         }
1093
1094         this->WriteServ("NOTICE Auth :Welcome to \002%s\002!",ServerInstance->Config->Network);
1095         this->WriteServ("001 %s :Welcome to the %s IRC Network %s!%s@%s",this->nick, ServerInstance->Config->Network, this->nick, this->ident, this->host);
1096         this->WriteServ("002 %s :Your host is %s, running version %s",this->nick,ServerInstance->Config->ServerName,VERSION);
1097         this->WriteServ("003 %s :This server was created %s %s", this->nick, __TIME__, __DATE__);
1098         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());
1099
1100         ServerInstance->Config->Send005(this);
1101
1102         this->ShowMOTD();
1103
1104         /* Now registered */
1105         if (ServerInstance->unregistered_count)
1106                 ServerInstance->unregistered_count--;
1107
1108         /* Trigger LUSERS output, give modules a chance too */
1109         int MOD_RESULT = 0;
1110         FOREACH_RESULT(I_OnPreCommand, OnPreCommand("LUSERS", NULL, 0, this, true, "LUSERS"));
1111         if (!MOD_RESULT)
1112                 ServerInstance->CallCommandHandler("LUSERS", NULL, 0, this);
1113
1114         /*
1115          * fix 3 by brain, move registered = 7 below these so that spurious modes and host
1116          * changes dont go out onto the network and produce 'fake direction'.
1117          */
1118         FOREACH_MOD(I_OnUserConnect,OnUserConnect(this));
1119
1120         this->registered = REG_ALL;
1121
1122         FOREACH_MOD(I_OnPostConnect,OnPostConnect(this));
1123
1124         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);
1125 }
1126
1127 /** userrec::UpdateNick()
1128  * re-allocates a nick in the user_hash after they change nicknames,
1129  * returns a pointer to the new user as it may have moved
1130  */
1131 userrec* userrec::UpdateNickHash(const char* New)
1132 {
1133         try
1134         {
1135                 //user_hash::iterator newnick;
1136                 user_hash::iterator oldnick = ServerInstance->clientlist->find(this->nick);
1137
1138                 if (!strcasecmp(this->nick,New))
1139                         return oldnick->second;
1140
1141                 if (oldnick == ServerInstance->clientlist->end())
1142                         return NULL; /* doesnt exist */
1143
1144                 userrec* olduser = oldnick->second;
1145                 (*(ServerInstance->clientlist))[New] = olduser;
1146                 ServerInstance->clientlist->erase(oldnick);
1147                 return olduser;
1148         }
1149
1150         catch (...)
1151         {
1152                 ServerInstance->Log(DEBUG,"Exception in userrec::UpdateNickHash()");
1153                 return NULL;
1154         }
1155 }
1156
1157 void userrec::InvalidateCache()
1158 {
1159         /* Invalidate cache */
1160         if (cached_fullhost)
1161                 free(cached_fullhost);
1162         if (cached_hostip)
1163                 free(cached_hostip);
1164         if (cached_makehost)
1165                 free(cached_makehost);
1166         if (cached_fullrealhost)
1167                 free(cached_fullrealhost);
1168         cached_fullhost = cached_hostip = cached_makehost = cached_fullrealhost = NULL;
1169 }
1170
1171 bool userrec::ForceNickChange(const char* newnick)
1172 {
1173         try
1174         {
1175                 int MOD_RESULT = 0;
1176
1177                 this->InvalidateCache();
1178
1179                 FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(this, newnick));
1180
1181                 if (MOD_RESULT)
1182                 {
1183                         ServerInstance->stats->statsCollisions++;
1184                         return false;
1185                 }
1186
1187                 if (ServerInstance->XLines->matches_qline(newnick))
1188                 {
1189                         ServerInstance->stats->statsCollisions++;
1190                         return false;
1191                 }
1192
1193                 if (this->registered == REG_ALL)
1194                 {
1195                         return (ServerInstance->Parser->CallHandler("NICK", &newnick, 1, this) == CMD_SUCCESS);
1196                 }
1197                 return false;
1198         }
1199
1200         catch (...)
1201         {
1202                 ServerInstance->Log(DEBUG,"Exception in userrec::ForceNickChange()");
1203                 return false;
1204         }
1205 }
1206
1207 void userrec::SetSockAddr(int protocol_family, const char* ip, int port)
1208 {
1209         switch (protocol_family)
1210         {
1211 #ifdef SUPPORT_IP6LINKS
1212                 case AF_INET6:
1213                 {
1214                         sockaddr_in6* sin = new sockaddr_in6;
1215                         sin->sin6_family = AF_INET6;
1216                         sin->sin6_port = port;
1217                         inet_pton(AF_INET6, ip, &sin->sin6_addr);
1218                         this->ip = (sockaddr*)sin;
1219                 }
1220                 break;
1221 #endif
1222                 case AF_INET:
1223                 {
1224                         sockaddr_in* sin = new sockaddr_in;
1225                         sin->sin_family = AF_INET;
1226                         sin->sin_port = port;
1227                         inet_pton(AF_INET, ip, &sin->sin_addr);
1228                         this->ip = (sockaddr*)sin;
1229                 }
1230                 break;
1231                 default:
1232                         ServerInstance->Log(DEBUG,"Ut oh, I dont know protocol %d to be set on '%s'!", protocol_family, this->nick);
1233                 break;
1234         }
1235 }
1236
1237 int userrec::GetPort()
1238 {
1239         if (this->ip == NULL)
1240                 return 0;
1241
1242         switch (this->GetProtocolFamily())
1243         {
1244 #ifdef SUPPORT_IP6LINKS
1245                 case AF_INET6:
1246                 {
1247                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1248                         return sin->sin6_port;
1249                 }
1250                 break;
1251 #endif
1252                 case AF_INET:
1253                 {
1254                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1255                         return sin->sin_port;
1256                 }
1257                 break;
1258                 default:
1259                 break;
1260         }
1261         return 0;
1262 }
1263
1264 int userrec::GetProtocolFamily()
1265 {
1266         if (this->ip == NULL)
1267                 return 0;
1268
1269         sockaddr_in* sin = (sockaddr_in*)this->ip;
1270         return sin->sin_family;
1271 }
1272
1273 const char* userrec::GetIPString()
1274 {
1275         static char buf[1024];
1276
1277         if (this->ip == NULL)
1278                 return "";
1279
1280         switch (this->GetProtocolFamily())
1281         {
1282 #ifdef SUPPORT_IP6LINKS
1283                 case AF_INET6:
1284                 {
1285                         static char temp[1024];
1286
1287                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1288                         inet_ntop(sin->sin6_family, &sin->sin6_addr, buf, sizeof(buf));
1289                         /* IP addresses starting with a : on irc are a Bad Thing (tm) */
1290                         if (*buf == ':')
1291                         {
1292                                 strlcpy(&temp[1], buf, sizeof(temp) - 1);
1293                                 *temp = '0';
1294                                 return temp;
1295                         }
1296                         return buf;
1297                 }
1298                 break;
1299 #endif
1300                 case AF_INET:
1301                 {
1302                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1303                         inet_ntop(sin->sin_family, &sin->sin_addr, buf, sizeof(buf));
1304                         return buf;
1305                 }
1306                 break;
1307                 default:
1308                 break;
1309         }
1310         return "";
1311 }
1312
1313 const char* userrec::GetIPString(char* buf)
1314 {
1315         if (this->ip == NULL)
1316         {
1317                 *buf = 0;
1318                 return buf;
1319         }
1320
1321         switch (this->GetProtocolFamily())
1322         {
1323 #ifdef SUPPORT_IP6LINKS
1324                 case AF_INET6:
1325                 {
1326                         static char temp[1024];
1327
1328                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1329                         inet_ntop(sin->sin6_family, &sin->sin6_addr, buf, sizeof(buf));
1330                         /* IP addresses starting with a : on irc are a Bad Thing (tm) */
1331                         if (*buf == ':')
1332                         {
1333                                 strlcpy(&temp[1], buf, sizeof(temp) - 1);
1334                                 *temp = '0';
1335                                 strlcpy(buf, temp, sizeof(temp));
1336                         }
1337                         return buf;
1338                 }
1339                 break;
1340 #endif
1341                 case AF_INET:
1342                 {
1343                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1344                         inet_ntop(sin->sin_family, &sin->sin_addr, buf, sizeof(buf));
1345                         return buf;
1346                 }
1347                 break;
1348
1349                 default:
1350                 break;
1351         }
1352         return "";
1353 }
1354
1355 /** NOTE: We cannot pass a const reference to this method.
1356  * The string is changed by the workings of the method,
1357  * so that if we pass const ref, we end up copying it to
1358  * something we can change anyway. Makes sense to just let
1359  * the compiler do that copy for us.
1360  */
1361 void userrec::Write(std::string text)
1362 {
1363         if (!ServerInstance->SE->BoundsCheckFd(this))
1364                 return;
1365
1366         try
1367         {
1368                 /* ServerInstance->Log(DEBUG,"C[%d] <- %s", this->GetFd(), text.c_str());
1369                  * WARNING: The above debug line is VERY loud, do NOT
1370                  * enable it till we have a good way of filtering it
1371                  * out of the logs (e.g. 1.2 would be good).
1372                  */
1373                 text.append("\r\n");
1374         }
1375         catch (...)
1376         {
1377                 ServerInstance->Log(DEBUG,"Exception in userrec::Write() std::string::append");
1378                 return;
1379         }
1380
1381         if (ServerInstance->Config->GetIOHook(this->GetPort()))
1382         {
1383                 try
1384                 {
1385                         /* XXX: The lack of buffering here is NOT a bug, modules implementing this interface have to
1386                          * implement their own buffering mechanisms
1387                          */
1388                         ServerInstance->Config->GetIOHook(this->GetPort())->OnRawSocketWrite(this->fd, text.data(), text.length());
1389                 }
1390                 catch (CoreException& modexcept)
1391                 {
1392                         ServerInstance->Log(DEBUG, "%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
1393                 }
1394         }
1395         else
1396         {
1397                 this->AddWriteBuf(text);
1398         }
1399         ServerInstance->stats->statsSent += text.length();
1400         this->ServerInstance->SE->WantWrite(this);
1401 }
1402
1403 /** Write()
1404  */
1405 void userrec::Write(const char *text, ...)
1406 {
1407         va_list argsPtr;
1408         char textbuffer[MAXBUF];
1409
1410         va_start(argsPtr, text);
1411         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1412         va_end(argsPtr);
1413
1414         this->Write(std::string(textbuffer));
1415 }
1416
1417 void userrec::WriteServ(const std::string& text)
1418 {
1419         char textbuffer[MAXBUF];
1420
1421         snprintf(textbuffer,MAXBUF,":%s %s",ServerInstance->Config->ServerName,text.c_str());
1422         this->Write(std::string(textbuffer));
1423 }
1424
1425 /** WriteServ()
1426  *  Same as Write(), except `text' is prefixed with `:server.name '.
1427  */
1428 void userrec::WriteServ(const char* text, ...)
1429 {
1430         va_list argsPtr;
1431         char textbuffer[MAXBUF];
1432
1433         va_start(argsPtr, text);
1434         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1435         va_end(argsPtr);
1436
1437         this->WriteServ(std::string(textbuffer));
1438 }
1439
1440
1441 void userrec::WriteFrom(userrec *user, const std::string &text)
1442 {
1443         char tb[MAXBUF];
1444
1445         snprintf(tb,MAXBUF,":%s %s",user->GetFullHost(),text.c_str());
1446
1447         this->Write(std::string(tb));
1448 }
1449
1450
1451 /* write text from an originating user to originating user */
1452
1453 void userrec::WriteFrom(userrec *user, const char* text, ...)
1454 {
1455         va_list argsPtr;
1456         char textbuffer[MAXBUF];
1457
1458         va_start(argsPtr, text);
1459         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1460         va_end(argsPtr);
1461
1462         this->WriteFrom(user, std::string(textbuffer));
1463 }
1464
1465
1466 /* write text to an destination user from a source user (e.g. user privmsg) */
1467
1468 void userrec::WriteTo(userrec *dest, const char *data, ...)
1469 {
1470         char textbuffer[MAXBUF];
1471         va_list argsPtr;
1472
1473         va_start(argsPtr, data);
1474         vsnprintf(textbuffer, MAXBUF, data, argsPtr);
1475         va_end(argsPtr);
1476
1477         this->WriteTo(dest, std::string(textbuffer));
1478 }
1479
1480 void userrec::WriteTo(userrec *dest, const std::string &data)
1481 {
1482         dest->WriteFrom(this, data);
1483 }
1484
1485
1486 void userrec::WriteCommon(const char* text, ...)
1487 {
1488         char textbuffer[MAXBUF];
1489         va_list argsPtr;
1490
1491         if (this->registered != REG_ALL)
1492                 return;
1493
1494         va_start(argsPtr, text);
1495         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1496         va_end(argsPtr);
1497
1498         this->WriteCommon(std::string(textbuffer));
1499 }
1500
1501 void userrec::WriteCommon(const std::string &text)
1502 {
1503         try
1504         {
1505                 bool sent_to_at_least_one = false;
1506                 char tb[MAXBUF];
1507
1508                 if (this->registered != REG_ALL)
1509                         return;
1510
1511                 uniq_id++;
1512
1513                 /* We dont want to be doing this n times, just once */
1514                 snprintf(tb,MAXBUF,":%s %s",this->GetFullHost(),text.c_str());
1515                 std::string out = tb;
1516
1517                 for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1518                 {
1519                         CUList* ulist = v->first->GetUsers();
1520                         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1521                         {
1522                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1523                                 {
1524                                         already_sent[i->first->fd] = uniq_id;
1525                                         i->first->Write(out);
1526                                         sent_to_at_least_one = true;
1527                                 }
1528                         }
1529                 }
1530
1531                 /*
1532                  * if the user was not in any channels, no users will receive the text. Make sure the user
1533                  * receives their OWN message for WriteCommon
1534                  */
1535                 if (!sent_to_at_least_one)
1536                 {
1537                         this->Write(std::string(tb));
1538                 }
1539         }
1540
1541         catch (...)
1542         {
1543                 ServerInstance->Log(DEBUG,"Exception in userrec::WriteCommon()");
1544         }
1545 }
1546
1547
1548 /* write a formatted string to all users who share at least one common
1549  * channel, NOT including the source user e.g. for use in QUIT
1550  */
1551
1552 void userrec::WriteCommonExcept(const char* text, ...)
1553 {
1554         char textbuffer[MAXBUF];
1555         va_list argsPtr;
1556
1557         va_start(argsPtr, text);
1558         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1559         va_end(argsPtr);
1560
1561         this->WriteCommonExcept(std::string(textbuffer));
1562 }
1563
1564 void userrec::WriteCommonQuit(const std::string &normal_text, const std::string &oper_text)
1565 {
1566         char tb1[MAXBUF];
1567         char tb2[MAXBUF];
1568
1569         if (this->registered != REG_ALL)
1570                 return;
1571
1572         uniq_id++;
1573         snprintf(tb1,MAXBUF,":%s QUIT :%s",this->GetFullHost(),normal_text.c_str());
1574         snprintf(tb2,MAXBUF,":%s QUIT :%s",this->GetFullHost(),oper_text.c_str());
1575         std::string out1 = tb1;
1576         std::string out2 = tb2;
1577
1578         for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1579         {
1580                 CUList *ulist = v->first->GetUsers();
1581                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1582                 {
1583                         if (this != i->first)
1584                         {
1585                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1586                                 {
1587                                         already_sent[i->first->fd] = uniq_id;
1588                                         i->first->Write(IS_OPER(i->first) ? out2 : out1);
1589                                 }
1590                         }
1591                 }
1592         }
1593 }
1594
1595 void userrec::WriteCommonExcept(const std::string &text)
1596 {
1597         char tb1[MAXBUF];
1598         std::string out1;
1599
1600         if (this->registered != REG_ALL)
1601                 return;
1602
1603         uniq_id++;
1604         snprintf(tb1,MAXBUF,":%s %s",this->GetFullHost(),text.c_str());
1605         out1 = tb1;
1606
1607         for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1608         {
1609                 CUList *ulist = v->first->GetUsers();
1610                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1611                 {
1612                         if (this != i->first)
1613                         {
1614                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1615                                 {
1616                                         already_sent[i->first->fd] = uniq_id;
1617                                         i->first->Write(out1);
1618                                 }
1619                         }
1620                 }
1621         }
1622
1623 }
1624
1625 void userrec::WriteWallOps(const std::string &text)
1626 {
1627         if (!IS_OPER(this) && IS_LOCAL(this))
1628                 return;
1629
1630         std::string wallop("WALLOPS :");
1631         wallop.append(text);
1632
1633         for (std::vector<userrec*>::const_iterator i = ServerInstance->local_users.begin(); i != ServerInstance->local_users.end(); i++)
1634         {
1635                 userrec* t = *i;
1636                 if (t->IsModeSet('w'))
1637                         this->WriteTo(t,wallop);
1638         }
1639 }
1640
1641 void userrec::WriteWallOps(const char* text, ...)
1642 {
1643         char textbuffer[MAXBUF];
1644         va_list argsPtr;
1645
1646         va_start(argsPtr, text);
1647         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1648         va_end(argsPtr);
1649
1650         this->WriteWallOps(std::string(textbuffer));
1651 }
1652
1653 /* return 0 or 1 depending if users u and u2 share one or more common channels
1654  * (used by QUIT, NICK etc which arent channel specific notices)
1655  *
1656  * The old algorithm in 1.0 for this was relatively inefficient, iterating over
1657  * the first users channels then the second users channels within the outer loop,
1658  * therefore it was a maximum of x*y iterations (upon returning 0 and checking
1659  * all possible iterations). However this new function instead checks against the
1660  * channel's userlist in the inner loop which is a std::map<userrec*,userrec*>
1661  * and saves us time as we already know what pointer value we are after.
1662  * Don't quote me on the maths as i am not a mathematician or computer scientist,
1663  * but i believe this algorithm is now x+(log y) maximum iterations instead.
1664  */
1665 bool userrec::SharesChannelWith(userrec *other)
1666 {
1667         if ((!other) || (this->registered != REG_ALL) || (other->registered != REG_ALL))
1668                 return false;
1669
1670         /* Outer loop */
1671         for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1672         {
1673                 /* Eliminate the inner loop (which used to be ~equal in size to the outer loop)
1674                  * by replacing it with a map::find which *should* be more efficient
1675                  */
1676                 if (i->first->HasUser(other))
1677                         return true;
1678         }
1679         return false;
1680 }
1681
1682 bool userrec::ChangeName(const char* gecos)
1683 {
1684         if (!strcmp(gecos, this->fullname))
1685                 return true;
1686
1687         if (IS_LOCAL(this))
1688         {
1689                 int MOD_RESULT = 0;
1690                 FOREACH_RESULT(I_OnChangeLocalUserGECOS,OnChangeLocalUserGECOS(this,gecos));
1691                 if (MOD_RESULT)
1692                         return false;
1693                 FOREACH_MOD(I_OnChangeName,OnChangeName(this,gecos));
1694         }
1695         strlcpy(this->fullname,gecos,MAXGECOS+1);
1696
1697         return true;
1698 }
1699
1700 bool userrec::ChangeDisplayedHost(const char* host)
1701 {
1702         if (!strcmp(host, this->dhost))
1703                 return true;
1704
1705         if (IS_LOCAL(this))
1706         {
1707                 int MOD_RESULT = 0;
1708                 FOREACH_RESULT(I_OnChangeLocalUserHost,OnChangeLocalUserHost(this,host));
1709                 if (MOD_RESULT)
1710                         return false;
1711                 FOREACH_MOD(I_OnChangeHost,OnChangeHost(this,host));
1712         }
1713         if (this->ServerInstance->Config->CycleHosts)
1714                 this->WriteCommonExcept("QUIT :Changing hosts");
1715
1716         /* Fix by Om: userrec::dhost is 65 long, this was truncating some long hosts */
1717         strlcpy(this->dhost,host,64);
1718
1719         this->InvalidateCache();
1720
1721         if (this->ServerInstance->Config->CycleHosts)
1722         {
1723                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1724                 {
1725                         i->first->WriteAllExceptSender(this, false, 0, "JOIN %s", i->first->name);
1726                         std::string n = this->ServerInstance->Modes->ModeString(this, i->first);
1727                         if (n.length() > 0)
1728                                 i->first->WriteAllExceptSender(this, true, 0, "MODE %s +%s", i->first->name, n.c_str());
1729                 }
1730         }
1731
1732         if (IS_LOCAL(this))
1733                 this->WriteServ("396 %s %s :is now your displayed host",this->nick,this->dhost);
1734
1735         return true;
1736 }
1737
1738 bool userrec::ChangeIdent(const char* newident)
1739 {
1740         if (!strcmp(newident, this->ident))
1741                 return true;
1742
1743         if (this->ServerInstance->Config->CycleHosts)
1744                 this->WriteCommonExcept("%s","QUIT :Changing ident");
1745
1746         strlcpy(this->ident, newident, IDENTMAX+2);
1747
1748         this->InvalidateCache();
1749
1750         if (this->ServerInstance->Config->CycleHosts)
1751         {
1752                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1753                 {
1754                         i->first->WriteAllExceptSender(this, false, 0, "JOIN %s", i->first->name);
1755                         std::string n = this->ServerInstance->Modes->ModeString(this, i->first);
1756                         if (n.length() > 0)
1757                                 i->first->WriteAllExceptSender(this, true, 0, "MODE %s +%s", i->first->name, n.c_str());
1758                 }
1759         }
1760
1761         return true;
1762 }
1763
1764 void userrec::SendAll(const char* command, char* text, ...)
1765 {
1766         char textbuffer[MAXBUF];
1767         char formatbuffer[MAXBUF];
1768         va_list argsPtr;
1769
1770         va_start(argsPtr, text);
1771         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1772         va_end(argsPtr);
1773
1774         snprintf(formatbuffer,MAXBUF,":%s %s $* :%s", this->GetFullHost(), command, textbuffer);
1775         std::string fmt = formatbuffer;
1776
1777         for (std::vector<userrec*>::const_iterator i = ServerInstance->local_users.begin(); i != ServerInstance->local_users.end(); i++)
1778         {
1779                 (*i)->Write(fmt);
1780         }
1781 }
1782
1783
1784 std::string userrec::ChannelList(userrec* source)
1785 {
1786         try
1787         {
1788                 std::string list;
1789                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1790                 {
1791                         /* If the target is the same as the sender, let them see all their channels.
1792                          * If the channel is NOT private/secret OR the user shares a common channel
1793                          * If the user is an oper, and the <options:operspywhois> option is set.
1794                          */
1795                         if ((source == this) || (IS_OPER(source) && ServerInstance->Config->OperSpyWhois) || (((!i->first->IsModeSet('p')) && (!i->first->IsModeSet('s'))) || (i->first->HasUser(source))))
1796                         {
1797                                 list.append(i->first->GetPrefixChar(this)).append(i->first->name).append(" ");
1798                         }
1799                 }
1800                 return list;
1801         }
1802         catch (...)
1803         {
1804                 ServerInstance->Log(DEBUG,"Exception in userrec::ChannelList()");
1805                 return "";
1806         }
1807 }
1808
1809 void userrec::SplitChanList(userrec* dest, const std::string &cl)
1810 {
1811         std::string line;
1812         std::ostringstream prefix;
1813         std::string::size_type start, pos, length;
1814
1815         try
1816         {
1817                 prefix << this->nick << " " << dest->nick << " :";
1818                 line = prefix.str();
1819                 int namelen = strlen(ServerInstance->Config->ServerName) + 6;
1820
1821                 for (start = 0; (pos = cl.find(' ', start)) != std::string::npos; start = pos+1)
1822                 {
1823                         length = (pos == std::string::npos) ? cl.length() : pos;
1824
1825                         if (line.length() + namelen + length - start > 510)
1826                         {
1827                                 ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1828                                 line = prefix.str();
1829                         }
1830
1831                         if(pos == std::string::npos)
1832                         {
1833                                 line.append(cl.substr(start, length - start));
1834                                 break;
1835                         }
1836                         else
1837                         {
1838                                 line.append(cl.substr(start, length - start + 1));
1839                         }
1840                 }
1841
1842                 if (line.length())
1843                 {
1844                         ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1845                 }
1846         }
1847
1848         catch (...)
1849         {
1850                 ServerInstance->Log(DEBUG,"Exception in userrec::SplitChanList()");
1851         }
1852 }
1853
1854 unsigned int userrec::GetMaxChans()
1855 {
1856         return this->MaxChans;
1857 }
1858
1859 /* looks up a users password for their connection class (<ALLOW>/<DENY> tags)
1860  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1861  * then their ip will be taken as 'priority' anyway, so for example,
1862  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1863  */
1864 ConnectClass* userrec::GetClass(const std::string &explicit_name)
1865 {
1866         if (!explicit_name.empty())
1867         {
1868                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1869                 {
1870                         if (explicit_name == i->GetName())
1871                                 return &(*i);
1872                 }
1873         }
1874         else
1875         {
1876                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1877                 {
1878                         if (((match(this->GetIPString(),i->GetHost().c_str(),true)) || (match(this->host,i->GetHost().c_str()))))
1879                         {
1880                                 if (i->GetPort())
1881                                 {
1882                                         if (this->GetPort() == i->GetPort())
1883                                                 return &(*i);
1884                                         else
1885                                                 continue;
1886                                 }
1887                                 else
1888                                         return &(*i);
1889                         }
1890                 }
1891         }
1892         return NULL;
1893 }
1894
1895 void userrec::PurgeEmptyChannels()
1896 {
1897         std::vector<chanrec*> to_delete;
1898
1899         // firstly decrement the count on each channel
1900         for (UCListIter f = this->chans.begin(); f != this->chans.end(); f++)
1901         {
1902                 f->first->RemoveAllPrefixes(this);
1903                 if (f->first->DelUser(this) == 0)
1904                 {
1905                         /* No users left in here, mark it for deletion */
1906                         try
1907                         {
1908                                 to_delete.push_back(f->first);
1909                         }
1910                         catch (...)
1911                         {
1912                                 ServerInstance->Log(DEBUG,"Exception in userrec::PurgeEmptyChannels to_delete.push_back()");
1913                         }
1914                 }
1915         }
1916
1917         for (std::vector<chanrec*>::iterator n = to_delete.begin(); n != to_delete.end(); n++)
1918         {
1919                 chanrec* thischan = *n;
1920                 chan_hash::iterator i2 = ServerInstance->chanlist->find(thischan->name);
1921                 if (i2 != ServerInstance->chanlist->end())
1922                 {
1923                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(i2->second));
1924                         DELETE(i2->second);
1925                         ServerInstance->chanlist->erase(i2);
1926                         this->chans.erase(*n);
1927                 }
1928         }
1929
1930         this->UnOper();
1931 }
1932
1933 void userrec::ShowMOTD()
1934 {
1935         if (!ServerInstance->Config->MOTD.size())
1936         {
1937                 this->WriteServ("422 %s :Message of the day file is missing.",this->nick);
1938                 return;
1939         }
1940         this->WriteServ("375 %s :%s message of the day", this->nick, ServerInstance->Config->ServerName);
1941
1942         for (file_cache::iterator i = ServerInstance->Config->MOTD.begin(); i != ServerInstance->Config->MOTD.end(); i++)
1943                 this->WriteServ("372 %s :- %s",this->nick,i->c_str());
1944
1945         this->WriteServ("376 %s :End of message of the day.", this->nick);
1946 }
1947
1948 void userrec::ShowRULES()
1949 {
1950         if (!ServerInstance->Config->RULES.size())
1951         {
1952                 this->WriteServ("434 %s :RULES File is missing",this->nick);
1953                 return;
1954         }
1955
1956         this->WriteServ("308 %s :- %s Server Rules -",this->nick,ServerInstance->Config->ServerName);
1957
1958         for (file_cache::iterator i = ServerInstance->Config->RULES.begin(); i != ServerInstance->Config->RULES.end(); i++)
1959                 this->WriteServ("232 %s :- %s",this->nick,i->c_str());
1960
1961         this->WriteServ("309 %s :End of RULES command.",this->nick);
1962 }
1963
1964 void userrec::HandleEvent(EventType et, int errornum)
1965 {
1966         /* WARNING: May delete this user! */
1967         int thisfd = this->GetFd();
1968
1969         try
1970         {
1971                 switch (et)
1972                 {
1973                         case EVENT_READ:
1974                                 ServerInstance->ProcessUser(this);
1975                         break;
1976                         case EVENT_WRITE:
1977                                 this->FlushWriteBuf();
1978                         break;
1979                         case EVENT_ERROR:
1980                                 /** This should be safe, but dont DARE do anything after it -- Brain */
1981                                 this->SetWriteError(errornum ? strerror(errornum) : "EOF from client");
1982                         break;
1983                 }
1984         }
1985         catch (...)
1986         {
1987                 ServerInstance->Log(DEBUG,"Exception in userrec::HandleEvent intercepted");
1988         }
1989
1990         /* If the user has raised an error whilst being processed, quit them now we're safe to */
1991         if ((ServerInstance->SE->GetRef(thisfd) == this))
1992         {
1993                 if (!WriteError.empty())
1994                 {
1995                         userrec::QuitUser(ServerInstance, this, GetWriteError());
1996                 }
1997         }
1998 }
1999
2000 void userrec::SetOperQuit(const std::string &oquit)
2001 {
2002         if (operquit)
2003                 return;
2004
2005         operquit = strdup(oquit.c_str());
2006 }
2007
2008 const char* userrec::GetOperQuit()
2009 {
2010         return operquit ? operquit : "";
2011 }
2012
2013 VisData::VisData()
2014 {
2015 }
2016
2017 VisData::~VisData()
2018 {
2019 }
2020
2021 bool VisData::VisibleTo(userrec* user)
2022 {
2023         return true;
2024 }
2025