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 <stdarg.h>
  16 #include "socketengine.h"
  17 #include "wildcard.h"
  18 #include "xline.h"
  19 #include "commands/cmd_whowas.h"
  20
  21 static unsigned long already_sent[MAX_DESCRIPTORS] = {0};
  22
  23 /* XXX: Used for speeding up WriteCommon operations */
  24 unsigned long uniq_id = 0;
  25
  26 bool InitTypes(ServerConfig* conf, const char* tag)
  27 {
  28         if (conf->opertypes.size())
  29         {
  30                 for (opertype_t::iterator n = conf->opertypes.begin(); n != conf->opertypes.end(); n++)
  31                 {
  32                         if (n->second)
  33                                 delete[] n->second;
  34                 }
  35         }
  36
  37         conf->opertypes.clear();
  38         return true;
  39 }
  40
  41 bool InitClasses(ServerConfig* conf, const char* tag)
  42 {
  43         if (conf->operclass.size())
  44         {
  45                 for (operclass_t::iterator n = conf->operclass.begin(); n != conf->operclass.end(); n++)
  46                 {
  47                         if (n->second)
  48                                 delete[] n->second;
  49                 }
  50         }
  51
  52         conf->operclass.clear();
  53         return true;
  54 }
  55
  56 bool DoType(ServerConfig* conf, const char* tag, char** entries, ValueList &values, int* types)
  57 {
  58         const char* TypeName = values[0].GetString();
  59         const char* Classes = values[1].GetString();
  60
  61         conf->opertypes[TypeName] = strnewdup(Classes);
  62         return true;
  63 }
  64
  65 bool DoClass(ServerConfig* conf, const char* tag, char** entries, ValueList &values, int* types)
  66 {
  67         const char* ClassName = values[0].GetString();
  68         const char* CommandList = values[1].GetString();
  69
  70         conf->operclass[ClassName] = strnewdup(CommandList);
  71         return true;
  72 }
  73
  74 bool DoneClassesAndTypes(ServerConfig* conf, const char* tag)
  75 {
  76         return true;
  77 }
  78
  79 std::string userrec::ProcessNoticeMasks(const char *sm)
  80 {
  81         bool adding = true, oldadding = false;
  82         const char *c = sm;
  83         std::string output;
  84
  85         while (c && *c)
  86         {
  87                 switch (*c)
  88                 {
  89                         case '+':
  90                                 adding = true;
  91                         break;
  92                         case '-':
  93                                 adding = false;
  94                         break;
  95                         case '*':
  96                                 for (unsigned char d = 'A'; d <= 'z'; d++)
  97                                 {
  98                                         if (ServerInstance->SNO->IsEnabled(d))
  99                                         {
 100                                                 if ((!IsNoticeMaskSet(d) && adding) || (IsNoticeMaskSet(d) && !adding))
 101                                                 {
 102                                                         if ((oldadding != adding) || (!output.length()))
 103                                                                 output += (adding ? '+' : '-');
 104
 105                                                         this->SetNoticeMask(d, adding);
 106
 107                                                         output += d;
 108                                                 }
 109                                         }
 110                                         oldadding = adding;
 111                                 }
 112                         break;
 113                         default:
 114                                 if ((*c >= 'A') && (*c <= 'z') && (ServerInstance->SNO->IsEnabled(*c)))
 115                                 {
 116                                         if ((!IsNoticeMaskSet(*c) && adding) || (IsNoticeMaskSet(*c) && !adding))
 117                                         {
 118                                                 if ((oldadding != adding) || (!output.length()))
 119                                                         output += (adding ? '+' : '-');
 120
 121                                                 this->SetNoticeMask(*c, adding);
 122
 123                                                 output += *c;
 124                                         }
 125                                 }
 126                                 oldadding = adding;
 127                         break;
 128                 }
 129
 130                 *c++;
 131         }
 132
 133         return output;
 134 }
 135
 136 void userrec::StartDNSLookup()
 137 {
 138         try
 139         {
 140                 bool cached;
 141                 const char* ip = this->GetIPString();
 142
 143                 /* Special case for 4in6 (Have i mentioned i HATE 4in6?) */
 144                 if (!strncmp(ip, "0::ffff:", 8))
 145                         res_reverse = new UserResolver(this->ServerInstance, this, ip + 8, DNS_QUERY_PTR4, cached);
 146                 else
 147                         res_reverse = new UserResolver(this->ServerInstance, this, ip, this->GetProtocolFamily() == AF_INET ? DNS_QUERY_PTR4 : DNS_QUERY_PTR6, cached);
 148
 149                 this->ServerInstance->AddResolver(res_reverse, cached);
 150         }
 151         catch (CoreException& e)
 152         {
 153                 ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
 154         }
 155 }
 156
 157 UserResolver::UserResolver(InspIRCd* Instance, userrec* user, std::string to_resolve, QueryType qt, bool &cache) :
 158         Resolver(Instance, to_resolve, qt, cache), bound_user(user)
 159 {
 160         this->fwd = (qt == DNS_QUERY_A || qt == DNS_QUERY_AAAA);
 161         this->bound_fd = user->GetFd();
 162 }
 163
 164 void UserResolver::OnLookupComplete(const std::string &result, unsigned int ttl, bool cached, int resultnum)
 165 {
 166         /* We are only interested in the first matching result */
 167         if (resultnum)
 168                 return;
 169
 170         if ((!this->fwd) && (ServerInstance->SE->GetRef(this->bound_fd) == this->bound_user))
 171         {
 172                 this->bound_user->stored_host = result;
 173                 try
 174                 {
 175                         /* Check we didnt time out */
 176                         if (this->bound_user->registered != REG_ALL)
 177                         {
 178                                 bool cached;
 179 #ifdef IPV6
 180                                 if (this->bound_user->GetProtocolFamily() == AF_INET6)
 181                                 {
 182                                         /* IPV6 forward lookup (with possibility of 4in6) */
 183                                         const char* ip = this->bound_user->GetIPString();
 184                                         bound_user->res_forward = new UserResolver(this->ServerInstance, this->bound_user, result, (!strncmp(ip, "0::ffff:", 8) ? DNS_QUERY_A : DNS_QUERY_AAAA), cached);
 185                                 }
 186                                 else
 187                                         /* IPV4 lookup (mixed protocol mode) */
 188 #endif
 189                                 /* IPV4 lookup (ipv4 only mode) */
 190                                 bound_user->res_forward = new UserResolver(this->ServerInstance, this->bound_user, result, DNS_QUERY_A, cached);
 191                                 this->ServerInstance->AddResolver(bound_user->res_forward, cached);
 192                         }
 193                 }
 194                 catch (CoreException& e)
 195                 {
 196                         ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
 197                 }
 198         }
 199         else if ((this->fwd) && (ServerInstance->SE->GetRef(this->bound_fd) == this->bound_user))
 200         {
 201                 /* Both lookups completed */
 202                 std::string result2("0::ffff:");
 203                 result2.append(result);
 204                 if (this->bound_user->GetIPString() == result || this->bound_user->GetIPString() == result2)
 205                 {
 206                         std::string hostname = this->bound_user->stored_host;
 207                         if (hostname.length() < 65)
 208                         {
 209                                 /* Check we didnt time out */
 210                                 if ((this->bound_user->registered != REG_ALL) && (!this->bound_user->dns_done))
 211                                 {
 212                                         /* Hostnames starting with : are not a good thing (tm) */
 213                                         if (*(hostname.c_str()) == ':')
 214                                                 hostname.insert(0, "0");
 215
 216                                         this->bound_user->WriteServ("NOTICE Auth :*** Found your hostname (%s)%s", hostname.c_str(), (cached ? " -- cached" : ""));
 217                                         this->bound_user->dns_done = true;
 218                                         strlcpy(this->bound_user->dhost, hostname.c_str(),64);
 219                                         strlcpy(this->bound_user->host, hostname.c_str(),64);
 220                                         /* Invalidate cache */
 221                                         this->bound_user->InvalidateCache();
 222                                 }
 223                         }
 224                         else
 225                         {
 226                                 if (!this->bound_user->dns_done)
 227                                 {
 228                                         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());
 229                                         this->bound_user->dns_done = true;
 230                                 }
 231                         }
 232                 }
 233                 else
 234                 {
 235                         if (!this->bound_user->dns_done)
 236                         {
 237                                 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());
 238                                 this->bound_user->dns_done = true;
 239                         }
 240                 }
 241         }
 242 }
 243
 244 void UserResolver::OnError(ResolverError e, const std::string &errormessage)
 245 {
 246         if (ServerInstance->SE->GetRef(this->bound_fd) == this->bound_user)
 247         {
 248                 /* Since dns timeout is implemented outside of the resolver, this was a race condition that could result in this message being sent *after*
 249                  * the user was fully connected. This check fixes that issue  - Special */
 250                 if (!this->bound_user->dns_done)
 251                 {
 252                         /* Error message here */
 253                         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());
 254                         this->bound_user->dns_done = true;
 255                 }
 256         }
 257 }
 258
 259
 260 bool userrec::IsNoticeMaskSet(unsigned char sm)
 261 {
 262         return (snomasks[sm-65]);
 263 }
 264
 265 void userrec::SetNoticeMask(unsigned char sm, bool value)
 266 {
 267         snomasks[sm-65] = value;
 268 }
 269
 270 const char* userrec::FormatNoticeMasks()
 271 {
 272         static char data[MAXBUF];
 273         int offset = 0;
 274
 275         for (int n = 0; n < 64; n++)
 276         {
 277                 if (snomasks[n])
 278                         data[offset++] = n+65;
 279         }
 280
 281         data[offset] = 0;
 282         return data;
 283 }
 284
 285
 286
 287 bool userrec::IsModeSet(unsigned char m)
 288 {
 289         return (modes[m-65]);
 290 }
 291
 292 void userrec::SetMode(unsigned char m, bool value)
 293 {
 294         modes[m-65] = value;
 295 }
 296
 297 const char* userrec::FormatModes()
 298 {
 299         static char data[MAXBUF];
 300         int offset = 0;
 301         for (int n = 0; n < 64; n++)
 302         {
 303                 if (modes[n])
 304                         data[offset++] = n+65;
 305         }
 306         data[offset] = 0;
 307         return data;
 308 }
 309
 310 void userrec::DecrementModes()
 311 {
 312         for (int n = 0; n < 64; n++)
 313         {
 314                 if (modes[n])
 315                 {
 316                         ModeHandler* mh = ServerInstance->Modes->FindMode(n+65, MODETYPE_USER);
 317                         if (mh)
 318                                 mh->ChangeCount(-1);
 319                 }
 320         }
 321 }
 322
 323 userrec::userrec(InspIRCd* Instance, const std::string &uid) : ServerInstance(Instance)
 324 {
 325         *password = *nick = *ident = *host = *dhost = *fullname = *awaymsg = *oper = *uuid = 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         if (uid.empty())
 347                 strlcpy(uuid, Instance->GetUID().c_str(), UUID_LENGTH);
 348         else
 349                 strlcpy(uuid, uid.c_str(), UUID_LENGTH);
 350
 351         ServerInstance->Log(DEBUG,"New UUID for user: %s (%s)", uuid, uid.empty() ? "allocated new" : "used remote");
 352
 353         user_hash::iterator finduuid = Instance->uuidlist->find(uuid);
 354         if (finduuid == Instance->uuidlist->end())
 355                 (*Instance->uuidlist)[uuid] = this;
 356         else
 357                 throw CoreException("Duplicate UUID "+std::string(uuid)+" in userrec constructor");
 358 }
 359
 360 void userrec::RemoveCloneCounts()
 361 {
 362         clonemap::iterator x = ServerInstance->local_clones.find(this->GetIPString());
 363         if (x != ServerInstance->local_clones.end())
 364         {
 365                 x->second--;
 366                 if (!x->second)
 367                 {
 368                         ServerInstance->local_clones.erase(x);
 369                 }
 370         }
 371
 372         clonemap::iterator y = ServerInstance->global_clones.find(this->GetIPString());
 373         if (y != ServerInstance->global_clones.end())
 374         {
 375                 y->second--;
 376                 if (!y->second)
 377                 {
 378                         ServerInstance->global_clones.erase(y);
 379                 }
 380         }
 381 }
 382
 383 userrec::~userrec()
 384 {
 385         this->InvalidateCache();
 386         this->DecrementModes();
 387         if (operquit)
 388                 free(operquit);
 389         if (ip)
 390         {
 391                 this->RemoveCloneCounts();
 392
 393                 if (this->GetProtocolFamily() == AF_INET)
 394                 {
 395                         delete (sockaddr_in*)ip;
 396                 }
 397 #ifdef SUPPORT_IP6LINKS
 398                 else
 399                 {
 400                         delete (sockaddr_in6*)ip;
 401                 }
 402 #endif
 403         }
 404
 405         ServerInstance->uuidlist->erase(uuid);
 406 }
 407
 408 char* userrec::MakeHost()
 409 {
 410         if (this->cached_makehost)
 411                 return this->cached_makehost;
 412
 413         char nhost[MAXBUF];
 414         /* This is much faster than snprintf */
 415         char* t = nhost;
 416         for(char* n = ident; *n; n++)
 417                 *t++ = *n;
 418         *t++ = '@';
 419         for(char* n = host; *n; n++)
 420                 *t++ = *n;
 421         *t = 0;
 422
 423         this->cached_makehost = strdup(nhost);
 424
 425         return this->cached_makehost;
 426 }
 427
 428 char* userrec::MakeHostIP()
 429 {
 430         if (this->cached_hostip)
 431                 return this->cached_hostip;
 432
 433         char ihost[MAXBUF];
 434         /* This is much faster than snprintf */
 435         char* t = ihost;
 436         for(char* n = ident; *n; n++)
 437                 *t++ = *n;
 438         *t++ = '@';
 439         for(const char* n = this->GetIPString(); *n; n++)
 440                 *t++ = *n;
 441         *t = 0;
 442
 443         this->cached_hostip = strdup(ihost);
 444
 445         return this->cached_hostip;
 446 }
 447
 448 void userrec::CloseSocket()
 449 {
 450         ServerInstance->SE->Shutdown(this, 2);
 451         ServerInstance->SE->Close(this);
 452 }
 453
 454 char* userrec::GetFullHost()
 455 {
 456         if (this->cached_fullhost)
 457                 return this->cached_fullhost;
 458
 459         char result[MAXBUF];
 460         char* t = result;
 461         for(char* n = nick; *n; n++)
 462                 *t++ = *n;
 463         *t++ = '!';
 464         for(char* n = ident; *n; n++)
 465                 *t++ = *n;
 466         *t++ = '@';
 467         for(char* n = dhost; *n; n++)
 468                 *t++ = *n;
 469         *t = 0;
 470
 471         this->cached_fullhost = strdup(result);
 472
 473         return this->cached_fullhost;
 474 }
 475
 476 char* userrec::MakeWildHost()
 477 {
 478         static char nresult[MAXBUF];
 479         char* t = nresult;
 480         *t++ = '*';     *t++ = '!';
 481         *t++ = '*';     *t++ = '@';
 482         for(char* n = dhost; *n; n++)
 483                 *t++ = *n;
 484         *t = 0;
 485         return nresult;
 486 }
 487
 488 int userrec::ReadData(void* buffer, size_t size)
 489 {
 490         if (IS_LOCAL(this))
 491         {
 492 #ifndef WIN32
 493                 return read(this->fd, buffer, size);
 494 #else
 495                 return recv(this->fd, (char*)buffer, size, 0);
 496 #endif
 497         }
 498         else
 499                 return 0;
 500 }
 501
 502
 503 char* userrec::GetFullRealHost()
 504 {
 505         if (this->cached_fullrealhost)
 506                 return this->cached_fullrealhost;
 507
 508         char fresult[MAXBUF];
 509         char* t = fresult;
 510         for(char* n = nick; *n; n++)
 511                 *t++ = *n;
 512         *t++ = '!';
 513         for(char* n = ident; *n; n++)
 514                 *t++ = *n;
 515         *t++ = '@';
 516         for(char* n = host; *n; n++)
 517                 *t++ = *n;
 518         *t = 0;
 519
 520         this->cached_fullrealhost = strdup(fresult);
 521
 522         return this->cached_fullrealhost;
 523 }
 524
 525 bool userrec::IsInvited(const irc::string &channel)
 526 {
 527         for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 528         {
 529                 if (channel == *i)
 530                 {
 531                         return true;
 532                 }
 533         }
 534         return false;
 535 }
 536
 537 InvitedList* userrec::GetInviteList()
 538 {
 539         return &invites;
 540 }
 541
 542 void userrec::InviteTo(const irc::string &channel)
 543 {
 544         invites.push_back(channel);
 545 }
 546
 547 void userrec::RemoveInvite(const irc::string &channel)
 548 {
 549         for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 550         {
 551                 if (channel == *i)
 552                 {
 553                         invites.erase(i);
 554                         return;
 555                 }
 556         }
 557 }
 558
 559 bool userrec::HasPermission(const std::string &command)
 560 {
 561         char* mycmd;
 562         char* savept;
 563         char* savept2;
 564
 565         /*
 566          * users on remote servers can completely bypass all permissions based checks.
 567          * This prevents desyncs when one server has different type/class tags to another.
 568          * That having been said, this does open things up to the possibility of source changes
 569          * allowing remote kills, etc - but if they have access to the src, they most likely have
 570          * access to the conf - so it's an end to a means either way.
 571          */
 572         if (!IS_LOCAL(this))
 573                 return true;
 574
 575         // are they even an oper at all?
 576         if (IS_OPER(this))
 577         {
 578                 opertype_t::iterator iter_opertype = ServerInstance->Config->opertypes.find(this->oper);
 579                 if (iter_opertype != ServerInstance->Config->opertypes.end())
 580                 {
 581                         char* Classes = strdup(iter_opertype->second);
 582                         char* myclass = strtok_r(Classes," ",&savept);
 583                         while (myclass)
 584                         {
 585                                 operclass_t::iterator iter_operclass = ServerInstance->Config->operclass.find(myclass);
 586                                 if (iter_operclass != ServerInstance->Config->operclass.end())
 587                                 {
 588                                         char* CommandList = strdup(iter_operclass->second);
 589                                         mycmd = strtok_r(CommandList," ",&savept2);
 590                                         while (mycmd)
 591                                         {
 592                                                 if ((!strcasecmp(mycmd,command.c_str())) || (*mycmd == '*'))
 593                                                 {
 594                                                         free(Classes);
 595                                                         free(CommandList);
 596                                                         return true;
 597                                                 }
 598                                                 mycmd = strtok_r(NULL," ",&savept2);
 599                                         }
 600                                         free(CommandList);
 601                                 }
 602                                 myclass = strtok_r(NULL," ",&savept);
 603                         }
 604                         free(Classes);
 605                 }
 606         }
 607         return false;
 608 }
 609
 610 /** NOTE: We cannot pass a const reference to this method.
 611  * The string is changed by the workings of the method,
 612  * so that if we pass const ref, we end up copying it to
 613  * something we can change anyway. Makes sense to just let
 614  * the compiler do that copy for us.
 615  */
 616 bool userrec::AddBuffer(std::string a)
 617 {
 618         try
 619         {
 620                 std::string::size_type i = a.rfind('\r');
 621
 622                 while (i != std::string::npos)
 623                 {
 624                         a.erase(i, 1);
 625                         i = a.rfind('\r');
 626                 }
 627
 628                 if (a.length())
 629                         recvq.append(a);
 630
 631                 if (recvq.length() > (unsigned)this->recvqmax)
 632                 {
 633                         this->SetWriteError("RecvQ exceeded");
 634                         ServerInstance->WriteOpers("*** User %s RecvQ of %d exceeds connect class maximum of %d",this->nick,recvq.length(),this->recvqmax);
 635                         return false;
 636                 }
 637
 638                 return true;
 639         }
 640
 641         catch (...)
 642         {
 643                 ServerInstance->Log(DEBUG,"Exception in userrec::AddBuffer()");
 644                 return false;
 645         }
 646 }
 647
 648 bool userrec::BufferIsReady()
 649 {
 650         return (recvq.find('\n') != std::string::npos);
 651 }
 652
 653 void userrec::ClearBuffer()
 654 {
 655         recvq.clear();
 656 }
 657
 658 std::string userrec::GetBuffer()
 659 {
 660         try
 661         {
 662                 if (!recvq.length())
 663                         return "";
 664
 665                 /* Strip any leading \r or \n off the string.
 666                  * Usually there are only one or two of these,
 667                  * so its is computationally cheap to do.
 668                  */
 669                 std::string::iterator t = recvq.begin();
 670                 while (t != recvq.end() && (*t == '\r' || *t == '\n'))
 671                 {
 672                         recvq.erase(t);
 673                         t = recvq.begin();
 674                 }
 675
 676                 for (std::string::iterator x = recvq.begin(); x != recvq.end(); x++)
 677                 {
 678                         /* Find the first complete line, return it as the
 679                          * result, and leave the recvq as whats left
 680                          */
 681                         if (*x == '\n')
 682                         {
 683                                 std::string ret = std::string(recvq.begin(), x);
 684                                 recvq.erase(recvq.begin(), x + 1);
 685                                 return ret;
 686                         }
 687                 }
 688                 return "";
 689         }
 690
 691         catch (...)
 692         {
 693                 ServerInstance->Log(DEBUG,"Exception in userrec::GetBuffer()");
 694                 return "";
 695         }
 696 }
 697
 698 void userrec::AddWriteBuf(const std::string &data)
 699 {
 700         if (*this->GetWriteError())
 701                 return;
 702
 703         if (sendq.length() + data.length() > (unsigned)this->sendqmax)
 704         {
 705                 /*
 706                  * Fix by brain - Set the error text BEFORE calling writeopers, because
 707                  * if we dont it'll recursively  call here over and over again trying
 708                  * to repeatedly add the text to the sendq!
 709                  */
 710                 this->SetWriteError("SendQ exceeded");
 711                 ServerInstance->WriteOpers("*** User %s SendQ of %d exceeds connect class maximum of %d",this->nick,sendq.length() + data.length(),this->sendqmax);
 712                 return;
 713         }
 714
 715         try
 716         {
 717                 if (data.length() > MAXBUF - 2) /* MAXBUF has a value of 514, to account for line terminators */
 718                         sendq.append(data.substr(0,MAXBUF - 4)).append("\r\n"); /* MAXBUF-4 = 510 */
 719                 else
 720                         sendq.append(data);
 721         }
 722         catch (...)
 723         {
 724                 this->SetWriteError("SendQ exceeded");
 725                 ServerInstance->WriteOpers("*** User %s SendQ got an exception",this->nick);
 726         }
 727 }
 728
 729 // send AS MUCH OF THE USERS SENDQ as we are able to (might not be all of it)
 730 void userrec::FlushWriteBuf()
 731 {
 732         try
 733         {
 734                 if ((this->fd == FD_MAGIC_NUMBER) || (*this->GetWriteError()))
 735                 {
 736                         sendq.clear();
 737                 }
 738                 if ((sendq.length()) && (this->fd != FD_MAGIC_NUMBER))
 739                 {
 740                         int old_sendq_length = sendq.length();
 741                         int n_sent = ServerInstance->SE->Send(this, this->sendq.data(), this->sendq.length(), 0);
 742
 743                         if (n_sent == -1)
 744                         {
 745                                 if (errno == EAGAIN)
 746                                 {
 747                                         /* The socket buffer is full. This isnt fatal,
 748                                          * try again later.
 749                                          */
 750                                         this->ServerInstance->SE->WantWrite(this);
 751                                 }
 752                                 else
 753                                 {
 754                                         /* Fatal error, set write error and bail
 755                                          */
 756                                         this->SetWriteError(errno ? strerror(errno) : "EOF from client");
 757                                         return;
 758                                 }
 759                         }
 760                         else
 761                         {
 762                                 /* advance the queue */
 763                                 if (n_sent)
 764                                         this->sendq = this->sendq.substr(n_sent);
 765                                 /* update the user's stats counters */
 766                                 this->bytes_out += n_sent;
 767                                 this->cmds_out++;
 768                                 if (n_sent != old_sendq_length)
 769                                         this->ServerInstance->SE->WantWrite(this);
 770                         }
 771                 }
 772         }
 773
 774         catch (...)
 775         {
 776                 ServerInstance->Log(DEBUG,"Exception in userrec::FlushWriteBuf()");
 777         }
 778
 779         if (this->sendq.empty())
 780         {
 781                 FOREACH_MOD(I_OnBufferFlushed,OnBufferFlushed(this));
 782         }
 783 }
 784
 785 void userrec::SetWriteError(const std::string &error)
 786 {
 787         try
 788         {
 789                 // don't try to set the error twice, its already set take the first string.
 790                 if (this->WriteError.empty())
 791                         this->WriteError = error;
 792         }
 793
 794         catch (...)
 795         {
 796                 ServerInstance->Log(DEBUG,"Exception in userrec::SetWriteError()");
 797         }
 798 }
 799
 800 const char* userrec::GetWriteError()
 801 {
 802         return this->WriteError.c_str();
 803 }
 804
 805 void userrec::Oper(const std::string &opertype)
 806 {
 807         try
 808         {
 809                 this->modes[UM_OPERATOR] = 1;
 810                 this->WriteServ("MODE %s :+o", this->nick);
 811                 FOREACH_MOD(I_OnOper, OnOper(this, opertype));
 812                 ServerInstance->Log(DEFAULT,"OPER: %s!%s@%s opered as type: %s", this->nick, this->ident, this->host, opertype.c_str());
 813                 strlcpy(this->oper, opertype.c_str(), NICKMAX - 1);
 814                 ServerInstance->all_opers.push_back(this);
 815                 FOREACH_MOD(I_OnPostOper,OnPostOper(this, opertype));
 816         }
 817
 818         catch (...)
 819         {
 820                 ServerInstance->Log(DEBUG,"Exception in userrec::Oper()");
 821         }
 822 }
 823
 824 void userrec::UnOper()
 825 {
 826         try
 827         {
 828                 if (IS_OPER(this))
 829                 {
 830                         // unset their oper type (what IS_OPER checks), and remove +o
 831                         *this->oper = 0;
 832                         this->modes[UM_OPERATOR] = 0;
 833
 834                         // remove them from the opers list.
 835                         for (std::vector<userrec*>::iterator a = ServerInstance->all_opers.begin(); a < ServerInstance->all_opers.end(); a++)
 836                         {
 837                                 if (*a == this)
 838                                 {
 839                                         ServerInstance->all_opers.erase(a);
 840                                         return;
 841                                 }
 842                         }
 843                 }
 844         }
 845
 846         catch (...)
 847         {
 848                 ServerInstance->Log(DEBUG,"Exception in userrec::UnOper()");
 849         }
 850 }
 851
 852 void userrec::QuitUser(InspIRCd* Instance, userrec *user, const std::string &quitreason, const char* operreason)
 853 {
 854         user->muted = true;
 855         Instance->GlobalCulls.AddItem(user, quitreason.c_str(), operreason);
 856 }
 857
 858 /* adds or updates an entry in the whowas list */
 859 void userrec::AddToWhoWas()
 860 {
 861         command_t* whowas_command = ServerInstance->Parser->GetHandler("WHOWAS");
 862         if (whowas_command)
 863         {
 864                 std::deque<classbase*> params;
 865                 params.push_back(this);
 866                 whowas_command->HandleInternal(WHOWAS_ADD, params);
 867         }
 868 }
 869
 870 /* add a client connection to the sockets list */
 871 void userrec::AddClient(InspIRCd* Instance, int socket, int port, bool iscached, int socketfamily, sockaddr* ip)
 872 {
 873         /* NOTE: Calling this one parameter constructor for userrec automatically
 874          * allocates a new UUID and places it in the hash_map.
 875          */
 876         userrec* New = NULL;
 877         try
 878         {
 879                 New = new userrec(Instance);
 880         }
 881         catch (CoreException &e)
 882         {
 883                 Instance->Log(DEFAULT,"*** WTF *** Duplicated UUID! -- Crack smoking monkies have been unleashed.");
 884                 Instance->WriteOpers("*** WARNING *** Duplicate UUID allocated!");
 885                 return;
 886         }
 887
 888         int j = 0;
 889
 890         Instance->unregistered_count++;
 891
 892         char ipaddr[MAXBUF];
 893 #ifdef IPV6
 894         if (socketfamily == AF_INET6)
 895                 inet_ntop(AF_INET6, &((const sockaddr_in6*)ip)->sin6_addr, ipaddr, sizeof(ipaddr));
 896         else
 897 #endif
 898         inet_ntop(AF_INET, &((const sockaddr_in*)ip)->sin_addr, ipaddr, sizeof(ipaddr));
 899
 900         (*(Instance->clientlist))[New->uuid] = New;
 901         New->SetFd(socket);
 902
 903         /* The users default nick is their UUID */
 904         strlcpy(New->nick, New->uuid, NICKMAX - 1);
 905
 906         New->server = Instance->FindServerNamePtr(Instance->Config->ServerName);
 907         /* We don't need range checking here, we KNOW 'unknown\0' will fit into the ident field. */
 908         strcpy(New->ident, "unknown");
 909
 910         New->registered = REG_NONE;
 911         New->signon = Instance->Time() + Instance->Config->dns_timeout;
 912         New->lastping = 1;
 913
 914         New->SetSockAddr(socketfamily, ipaddr, port);
 915
 916         /* Smarter than your average bear^H^H^H^Hset of strlcpys. */
 917         for (const char* temp = New->GetIPString(); *temp && j < 64; temp++, j++)
 918                 New->dhost[j] = New->host[j] = *temp;
 919         New->dhost[j] = New->host[j] = 0;
 920
 921         Instance->AddLocalClone(New);
 922         Instance->AddGlobalClone(New);
 923
 924         /*
 925          * First class check. We do this again in FullConnect after DNS is done, and NICK/USER is recieved.
 926          * See my note down there for why this is required. DO NOT REMOVE. :) -- w00t
 927          */
 928         ConnectClass* i = New->GetClass();
 929
 930         if (!i)
 931         {
 932                 userrec::QuitUser(Instance, New, "Access denied by configuration");
 933                 return;
 934         }
 935
 936         /*
 937          * Check connect class settings and initialise settings into userrec.
 938          * This will be done again after DNS resolution. -- w00t
 939          */
 940         New->CheckClass();
 941
 942         Instance->local_users.push_back(New);
 943
 944         if ((Instance->local_users.size() > Instance->Config->SoftLimit) || (Instance->local_users.size() >= MAXCLIENTS))
 945         {
 946                 Instance->WriteOpers("*** Warning: softlimit value has been reached: %d clients", Instance->Config->SoftLimit);
 947                 userrec::QuitUser(Instance, New,"No more connections allowed");
 948                 return;
 949         }
 950
 951         /*
 952          * XXX -
 953          * this is done as a safety check to keep the file descriptors within range of fd_ref_table.
 954          * its a pretty big but for the moment valid assumption:
 955          * file descriptors are handed out starting at 0, and are recycled as theyre freed.
 956          * therefore if there is ever an fd over 65535, 65536 clients must be connected to the
 957          * irc server at once (or the irc server otherwise initiating this many connections, files etc)
 958          * which for the time being is a physical impossibility (even the largest networks dont have more
 959          * than about 10,000 users on ONE server!)
 960          */
 961 #ifndef WINDOWS
 962         if ((unsigned int)socket >= MAX_DESCRIPTORS)
 963         {
 964                 userrec::QuitUser(Instance, New, "Server is full");
 965                 return;
 966         }
 967 #endif
 968
 969         New->exempt = (Instance->XLines->matches_exception(New) != NULL);
 970         if (!New->exempt)
 971         {
 972                 ZLine* r = Instance->XLines->matches_zline(ipaddr);
 973                 if (r)
 974                 {
 975                         char reason[MAXBUF];
 976                         if (*Instance->Config->MoronBanner)
 977                                 New->WriteServ("NOTICE %s :*** %s", New->nick, Instance->Config->MoronBanner);
 978                         snprintf(reason,MAXBUF,"Z-Lined: %s",r->reason);
 979                         userrec::QuitUser(Instance, New, reason);
 980                         return;
 981                 }
 982         }
 983
 984         if (socket > -1)
 985         {
 986                 if (!Instance->SE->AddFd(New))
 987                 {
 988                         userrec::QuitUser(Instance, New, "Internal error handling connection");
 989                         return;
 990                 }
 991         }
 992
 993         /* NOTE: even if dns lookups are *off*, we still need to display this.
 994          * BOPM and other stuff requires it.
 995          */
 996         New->WriteServ("NOTICE Auth :*** Looking up your hostname...");
 997 }
 998
 999 unsigned long userrec::GlobalCloneCount()
1000 {
1001         clonemap::iterator x = ServerInstance->global_clones.find(this->GetIPString());
1002         if (x != ServerInstance->global_clones.end())
1003                 return x->second;
1004         else
1005                 return 0;
1006 }
1007
1008 unsigned long userrec::LocalCloneCount()
1009 {
1010         clonemap::iterator x = ServerInstance->local_clones.find(this->GetIPString());
1011         if (x != ServerInstance->local_clones.end())
1012                 return x->second;
1013         else
1014                 return 0;
1015 }
1016
1017 /*
1018  * Check class restrictions
1019  */
1020 void userrec::CheckClass(const std::string &explicit_class)
1021 {
1022         ConnectClass* a = this->GetClass(explicit_class);
1023
1024         if ((!a) || (a->GetType() == CC_DENY))
1025         {
1026                 userrec::QuitUser(ServerInstance, this, "Unauthorised connection");
1027                 return;
1028         }
1029         else if ((a->GetMaxLocal()) && (this->LocalCloneCount() > a->GetMaxLocal()))
1030         {
1031                 userrec::QuitUser(ServerInstance, this, "No more connections allowed from your host via this connect class (local)");
1032                 ServerInstance->WriteOpers("*** WARNING: maximum LOCAL connections (%ld) exceeded for IP %s", a->GetMaxLocal(), this->GetIPString());
1033                 return;
1034         }
1035         else if ((a->GetMaxGlobal()) && (this->GlobalCloneCount() > a->GetMaxGlobal()))
1036         {
1037                 userrec::QuitUser(ServerInstance, this, "No more connections allowed from your host via this connect class (global)");
1038                 ServerInstance->WriteOpers("*** WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s", a->GetMaxGlobal(), this->GetIPString());
1039                 return;
1040         }
1041
1042         this->pingmax = a->GetPingTime();
1043         this->nping = ServerInstance->Time() + a->GetPingTime() + ServerInstance->Config->dns_timeout;
1044         this->timeout = ServerInstance->Time() + a->GetRegTimeout();
1045         this->flood = a->GetFlood();
1046         this->threshold = a->GetThreshold();
1047         this->sendqmax = a->GetSendqMax();
1048         this->recvqmax = a->GetRecvqMax();
1049         this->MaxChans = a->GetMaxChans();
1050 }
1051
1052 void userrec::FullConnect()
1053 {
1054         ServerInstance->stats->statsConnects++;
1055         this->idle_lastmsg = ServerInstance->Time();
1056
1057         /*
1058          * You may be thinking "wtf, we checked this in userrec::AddClient!" - and yes, we did, BUT.
1059          * At the time AddClient is called, we don't have a resolved host, by here we probably do - which
1060          * may put the user into a totally seperate class with different restrictions! so we *must* check again.
1061          * Don't remove this! -- w00t
1062          */
1063         this->CheckClass();
1064
1065         /* Check the password, if one is required by the user's connect class.
1066          * This CANNOT be in CheckClass(), because that is called prior to PASS as well!
1067          */
1068         if ((!this->GetClass()->GetPass().empty()) && (!this->haspassed))
1069         {
1070                 userrec::QuitUser(ServerInstance, this, "Invalid password");
1071                 return;
1072         }
1073
1074         if (!this->exempt)
1075         {
1076                 GLine* r = ServerInstance->XLines->matches_gline(this);
1077
1078                 if (r)
1079                 {
1080                         this->muted = true;
1081                         char reason[MAXBUF];
1082                         if (*ServerInstance->Config->MoronBanner)
1083                                 this->WriteServ("NOTICE %s :*** %s", this->nick, ServerInstance->Config->MoronBanner);
1084                         snprintf(reason,MAXBUF,"G-Lined: %s",r->reason);
1085                         userrec::QuitUser(ServerInstance, this, reason);
1086                         return;
1087                 }
1088
1089                 KLine* n = ServerInstance->XLines->matches_kline(this);
1090
1091                 if (n)
1092                 {
1093                         this->muted = true;
1094                         char reason[MAXBUF];
1095                         if (*ServerInstance->Config->MoronBanner)
1096                                 this->WriteServ("NOTICE %s :*** %s", this, ServerInstance->Config->MoronBanner);
1097                         snprintf(reason,MAXBUF,"K-Lined: %s",n->reason);
1098                         userrec::QuitUser(ServerInstance, this, reason);
1099                         return;
1100                 }
1101         }
1102
1103         this->WriteServ("NOTICE Auth :Welcome to \002%s\002!",ServerInstance->Config->Network);
1104         this->WriteServ("001 %s :Welcome to the %s IRC Network %s!%s@%s",this->nick, ServerInstance->Config->Network, this->nick, this->ident, this->host);
1105         this->WriteServ("002 %s :Your host is %s, running version %s",this->nick,ServerInstance->Config->ServerName,VERSION);
1106         this->WriteServ("003 %s :This server was created %s %s", this->nick, __TIME__, __DATE__);
1107         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());
1108
1109         ServerInstance->Config->Send005(this);
1110
1111         this->WriteServ("042 %s %s :your unique ID", this->nick, this->uuid);
1112
1113
1114         this->ShowMOTD();
1115
1116         /* Now registered */
1117         if (ServerInstance->unregistered_count)
1118                 ServerInstance->unregistered_count--;
1119
1120         /* Trigger LUSERS output, give modules a chance too */
1121         int MOD_RESULT = 0;
1122         FOREACH_RESULT(I_OnPreCommand, OnPreCommand("LUSERS", NULL, 0, this, true, "LUSERS"));
1123         if (!MOD_RESULT)
1124                 ServerInstance->CallCommandHandler("LUSERS", NULL, 0, this);
1125
1126         /*
1127          * fix 3 by brain, move registered = 7 below these so that spurious modes and host
1128          * changes dont go out onto the network and produce 'fake direction'.
1129          */
1130         FOREACH_MOD(I_OnUserConnect,OnUserConnect(this));
1131
1132         this->registered = REG_ALL;
1133
1134         FOREACH_MOD(I_OnPostConnect,OnPostConnect(this));
1135
1136         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);
1137 }
1138
1139 /** userrec::UpdateNick()
1140  * re-allocates a nick in the user_hash after they change nicknames,
1141  * returns a pointer to the new user as it may have moved
1142  */
1143 userrec* userrec::UpdateNickHash(const char* New)
1144 {
1145         try
1146         {
1147                 //user_hash::iterator newnick;
1148                 user_hash::iterator oldnick = ServerInstance->clientlist->find(this->nick);
1149
1150                 if (!strcasecmp(this->nick,New))
1151                         return oldnick->second;
1152
1153                 if (oldnick == ServerInstance->clientlist->end())
1154                         return NULL; /* doesnt exist */
1155
1156                 userrec* olduser = oldnick->second;
1157                 (*(ServerInstance->clientlist))[New] = olduser;
1158                 ServerInstance->clientlist->erase(oldnick);
1159                 return olduser;
1160         }
1161
1162         catch (...)
1163         {
1164                 ServerInstance->Log(DEBUG,"Exception in userrec::UpdateNickHash()");
1165                 return NULL;
1166         }
1167 }
1168
1169 void userrec::InvalidateCache()
1170 {
1171         /* Invalidate cache */
1172         if (cached_fullhost)
1173                 free(cached_fullhost);
1174         if (cached_hostip)
1175                 free(cached_hostip);
1176         if (cached_makehost)
1177                 free(cached_makehost);
1178         if (cached_fullrealhost)
1179                 free(cached_fullrealhost);
1180         cached_fullhost = cached_hostip = cached_makehost = cached_fullrealhost = NULL;
1181 }
1182
1183 bool userrec::ForceNickChange(const char* newnick)
1184 {
1185         try
1186         {
1187                 int MOD_RESULT = 0;
1188
1189                 this->InvalidateCache();
1190
1191                 FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(this, newnick));
1192
1193                 if (MOD_RESULT)
1194                 {
1195                         ServerInstance->stats->statsCollisions++;
1196                         return false;
1197                 }
1198
1199                 if (ServerInstance->XLines->matches_qline(newnick))
1200                 {
1201                         ServerInstance->stats->statsCollisions++;
1202                         return false;
1203                 }
1204
1205                 if (this->registered == REG_ALL)
1206                 {
1207                         std::deque<classbase*> dummy;
1208                         command_t* nickhandler = ServerInstance->Parser->GetHandler("NICK");
1209                         if (nickhandler)
1210                         {
1211                                 nickhandler->HandleInternal(1, dummy);
1212                                 bool result = (ServerInstance->Parser->CallHandler("NICK", &newnick, 1, this) == CMD_SUCCESS);
1213                                 nickhandler->HandleInternal(0, dummy);
1214                                 return result;
1215                         }
1216                 }
1217                 return false;
1218         }
1219
1220         catch (...)
1221         {
1222                 ServerInstance->Log(DEBUG,"Exception in userrec::ForceNickChange()");
1223                 return false;
1224         }
1225 }
1226
1227 void userrec::SetSockAddr(int protocol_family, const char* ip, int port)
1228 {
1229         switch (protocol_family)
1230         {
1231 #ifdef SUPPORT_IP6LINKS
1232                 case AF_INET6:
1233                 {
1234                         sockaddr_in6* sin = new sockaddr_in6;
1235                         sin->sin6_family = AF_INET6;
1236                         sin->sin6_port = port;
1237                         inet_pton(AF_INET6, ip, &sin->sin6_addr);
1238                         this->ip = (sockaddr*)sin;
1239                 }
1240                 break;
1241 #endif
1242                 case AF_INET:
1243                 {
1244                         sockaddr_in* sin = new sockaddr_in;
1245                         sin->sin_family = AF_INET;
1246                         sin->sin_port = port;
1247                         inet_pton(AF_INET, ip, &sin->sin_addr);
1248                         this->ip = (sockaddr*)sin;
1249                 }
1250                 break;
1251                 default:
1252                         ServerInstance->Log(DEBUG,"Ut oh, I dont know protocol %d to be set on '%s'!", protocol_family, this->nick);
1253                 break;
1254         }
1255 }
1256
1257 int userrec::GetPort()
1258 {
1259         if (this->ip == NULL)
1260                 return 0;
1261
1262         switch (this->GetProtocolFamily())
1263         {
1264 #ifdef SUPPORT_IP6LINKS
1265                 case AF_INET6:
1266                 {
1267                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1268                         return sin->sin6_port;
1269                 }
1270                 break;
1271 #endif
1272                 case AF_INET:
1273                 {
1274                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1275                         return sin->sin_port;
1276                 }
1277                 break;
1278                 default:
1279                 break;
1280         }
1281         return 0;
1282 }
1283
1284 int userrec::GetProtocolFamily()
1285 {
1286         if (this->ip == NULL)
1287                 return 0;
1288
1289         sockaddr_in* sin = (sockaddr_in*)this->ip;
1290         return sin->sin_family;
1291 }
1292
1293 const char* userrec::GetIPString()
1294 {
1295         static char buf[1024];
1296
1297         if (this->ip == NULL)
1298                 return "";
1299
1300         switch (this->GetProtocolFamily())
1301         {
1302 #ifdef SUPPORT_IP6LINKS
1303                 case AF_INET6:
1304                 {
1305                         static char temp[1024];
1306
1307                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1308                         inet_ntop(sin->sin6_family, &sin->sin6_addr, buf, sizeof(buf));
1309                         /* IP addresses starting with a : on irc are a Bad Thing (tm) */
1310                         if (*buf == ':')
1311                         {
1312                                 strlcpy(&temp[1], buf, sizeof(temp) - 1);
1313                                 *temp = '0';
1314                                 return temp;
1315                         }
1316                         return buf;
1317                 }
1318                 break;
1319 #endif
1320                 case AF_INET:
1321                 {
1322                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1323                         inet_ntop(sin->sin_family, &sin->sin_addr, buf, sizeof(buf));
1324                         return buf;
1325                 }
1326                 break;
1327                 default:
1328                 break;
1329         }
1330         return "";
1331 }
1332
1333 const char* userrec::GetIPString(char* buf)
1334 {
1335         if (this->ip == NULL)
1336         {
1337                 *buf = 0;
1338                 return buf;
1339         }
1340
1341         switch (this->GetProtocolFamily())
1342         {
1343 #ifdef SUPPORT_IP6LINKS
1344                 case AF_INET6:
1345                 {
1346                         static char temp[1024];
1347
1348                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1349                         inet_ntop(sin->sin6_family, &sin->sin6_addr, buf, sizeof(buf));
1350                         /* IP addresses starting with a : on irc are a Bad Thing (tm) */
1351                         if (*buf == ':')
1352                         {
1353                                 strlcpy(&temp[1], buf, sizeof(temp) - 1);
1354                                 *temp = '0';
1355                                 strlcpy(buf, temp, sizeof(temp));
1356                         }
1357                         return buf;
1358                 }
1359                 break;
1360 #endif
1361                 case AF_INET:
1362                 {
1363                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1364                         inet_ntop(sin->sin_family, &sin->sin_addr, buf, sizeof(buf));
1365                         return buf;
1366                 }
1367                 break;
1368
1369                 default:
1370                 break;
1371         }
1372         return "";
1373 }
1374
1375 /** NOTE: We cannot pass a const reference to this method.
1376  * The string is changed by the workings of the method,
1377  * so that if we pass const ref, we end up copying it to
1378  * something we can change anyway. Makes sense to just let
1379  * the compiler do that copy for us.
1380  */
1381 void userrec::Write(std::string text)
1382 {
1383         if (!ServerInstance->SE->BoundsCheckFd(this))
1384                 return;
1385
1386         try
1387         {
1388                 /* ServerInstance->Log(DEBUG,"C[%d] O %s", this->GetFd(), text.c_str());
1389                  * WARNING: The above debug line is VERY loud, do NOT
1390                  * enable it till we have a good way of filtering it
1391                  * out of the logs (e.g. 1.2 would be good).
1392                  */
1393                 text.append("\r\n");
1394         }
1395         catch (...)
1396         {
1397                 ServerInstance->Log(DEBUG,"Exception in userrec::Write() std::string::append");
1398                 return;
1399         }
1400
1401         if (ServerInstance->Config->GetIOHook(this->GetPort()))
1402         {
1403                 try
1404                 {
1405                         /* XXX: The lack of buffering here is NOT a bug, modules implementing this interface have to
1406                          * implement their own buffering mechanisms
1407                          */
1408                         ServerInstance->Config->GetIOHook(this->GetPort())->OnRawSocketWrite(this->fd, text.data(), text.length());
1409                 }
1410                 catch (CoreException& modexcept)
1411                 {
1412                         ServerInstance->Log(DEBUG, "%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
1413                 }
1414         }
1415         else
1416         {
1417                 this->AddWriteBuf(text);
1418         }
1419         ServerInstance->stats->statsSent += text.length();
1420         this->ServerInstance->SE->WantWrite(this);
1421 }
1422
1423 /** Write()
1424  */
1425 void userrec::Write(const char *text, ...)
1426 {
1427         va_list argsPtr;
1428         char textbuffer[MAXBUF];
1429
1430         va_start(argsPtr, text);
1431         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1432         va_end(argsPtr);
1433
1434         this->Write(std::string(textbuffer));
1435 }
1436
1437 void userrec::WriteServ(const std::string& text)
1438 {
1439         char textbuffer[MAXBUF];
1440
1441         snprintf(textbuffer,MAXBUF,":%s %s",ServerInstance->Config->ServerName,text.c_str());
1442         this->Write(std::string(textbuffer));
1443 }
1444
1445 /** WriteServ()
1446  *  Same as Write(), except `text' is prefixed with `:server.name '.
1447  */
1448 void userrec::WriteServ(const char* text, ...)
1449 {
1450         va_list argsPtr;
1451         char textbuffer[MAXBUF];
1452
1453         va_start(argsPtr, text);
1454         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1455         va_end(argsPtr);
1456
1457         this->WriteServ(std::string(textbuffer));
1458 }
1459
1460
1461 void userrec::WriteFrom(userrec *user, const std::string &text)
1462 {
1463         char tb[MAXBUF];
1464
1465         snprintf(tb,MAXBUF,":%s %s",user->GetFullHost(),text.c_str());
1466
1467         this->Write(std::string(tb));
1468 }
1469
1470
1471 /* write text from an originating user to originating user */
1472
1473 void userrec::WriteFrom(userrec *user, const char* text, ...)
1474 {
1475         va_list argsPtr;
1476         char textbuffer[MAXBUF];
1477
1478         va_start(argsPtr, text);
1479         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1480         va_end(argsPtr);
1481
1482         this->WriteFrom(user, std::string(textbuffer));
1483 }
1484
1485
1486 /* write text to an destination user from a source user (e.g. user privmsg) */
1487
1488 void userrec::WriteTo(userrec *dest, const char *data, ...)
1489 {
1490         char textbuffer[MAXBUF];
1491         va_list argsPtr;
1492
1493         va_start(argsPtr, data);
1494         vsnprintf(textbuffer, MAXBUF, data, argsPtr);
1495         va_end(argsPtr);
1496
1497         this->WriteTo(dest, std::string(textbuffer));
1498 }
1499
1500 void userrec::WriteTo(userrec *dest, const std::string &data)
1501 {
1502         dest->WriteFrom(this, data);
1503 }
1504
1505
1506 void userrec::WriteCommon(const char* text, ...)
1507 {
1508         char textbuffer[MAXBUF];
1509         va_list argsPtr;
1510
1511         if (this->registered != REG_ALL)
1512                 return;
1513
1514         va_start(argsPtr, text);
1515         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1516         va_end(argsPtr);
1517
1518         this->WriteCommon(std::string(textbuffer));
1519 }
1520
1521 void userrec::WriteCommon(const std::string &text)
1522 {
1523         try
1524         {
1525                 bool sent_to_at_least_one = false;
1526                 char tb[MAXBUF];
1527
1528                 if (this->registered != REG_ALL)
1529                         return;
1530
1531                 uniq_id++;
1532
1533                 /* We dont want to be doing this n times, just once */
1534                 snprintf(tb,MAXBUF,":%s %s",this->GetFullHost(),text.c_str());
1535                 std::string out = tb;
1536
1537                 for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1538                 {
1539                         CUList* ulist = v->first->GetUsers();
1540                         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1541                         {
1542                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1543                                 {
1544                                         already_sent[i->first->fd] = uniq_id;
1545                                         i->first->Write(out);
1546                                         sent_to_at_least_one = true;
1547                                 }
1548                         }
1549                 }
1550
1551                 /*
1552                  * if the user was not in any channels, no users will receive the text. Make sure the user
1553                  * receives their OWN message for WriteCommon
1554                  */
1555                 if (!sent_to_at_least_one)
1556                 {
1557                         this->Write(std::string(tb));
1558                 }
1559         }
1560
1561         catch (...)
1562         {
1563                 ServerInstance->Log(DEBUG,"Exception in userrec::WriteCommon()");
1564         }
1565 }
1566
1567
1568 /* write a formatted string to all users who share at least one common
1569  * channel, NOT including the source user e.g. for use in QUIT
1570  */
1571
1572 void userrec::WriteCommonExcept(const char* text, ...)
1573 {
1574         char textbuffer[MAXBUF];
1575         va_list argsPtr;
1576
1577         va_start(argsPtr, text);
1578         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1579         va_end(argsPtr);
1580
1581         this->WriteCommonExcept(std::string(textbuffer));
1582 }
1583
1584 void userrec::WriteCommonQuit(const std::string &normal_text, const std::string &oper_text)
1585 {
1586         char tb1[MAXBUF];
1587         char tb2[MAXBUF];
1588
1589         if (this->registered != REG_ALL)
1590                 return;
1591
1592         uniq_id++;
1593         snprintf(tb1,MAXBUF,":%s QUIT :%s",this->GetFullHost(),normal_text.c_str());
1594         snprintf(tb2,MAXBUF,":%s QUIT :%s",this->GetFullHost(),oper_text.c_str());
1595         std::string out1 = tb1;
1596         std::string out2 = tb2;
1597
1598         for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1599         {
1600                 CUList *ulist = v->first->GetUsers();
1601                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1602                 {
1603                         if (this != i->first)
1604                         {
1605                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1606                                 {
1607                                         already_sent[i->first->fd] = uniq_id;
1608                                         i->first->Write(IS_OPER(i->first) ? out2 : out1);
1609                                 }
1610                         }
1611                 }
1612         }
1613 }
1614
1615 void userrec::WriteCommonExcept(const std::string &text)
1616 {
1617         char tb1[MAXBUF];
1618         std::string out1;
1619
1620         if (this->registered != REG_ALL)
1621                 return;
1622
1623         uniq_id++;
1624         snprintf(tb1,MAXBUF,":%s %s",this->GetFullHost(),text.c_str());
1625         out1 = tb1;
1626
1627         for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1628         {
1629                 CUList *ulist = v->first->GetUsers();
1630                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1631                 {
1632                         if (this != i->first)
1633                         {
1634                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1635                                 {
1636                                         already_sent[i->first->fd] = uniq_id;
1637                                         i->first->Write(out1);
1638                                 }
1639                         }
1640                 }
1641         }
1642
1643 }
1644
1645 void userrec::WriteWallOps(const std::string &text)
1646 {
1647         if (!IS_OPER(this) && IS_LOCAL(this))
1648                 return;
1649
1650         std::string wallop("WALLOPS :");
1651         wallop.append(text);
1652
1653         for (std::vector<userrec*>::const_iterator i = ServerInstance->local_users.begin(); i != ServerInstance->local_users.end(); i++)
1654         {
1655                 userrec* t = *i;
1656                 if (t->IsModeSet('w'))
1657                         this->WriteTo(t,wallop);
1658         }
1659 }
1660
1661 void userrec::WriteWallOps(const char* text, ...)
1662 {
1663         char textbuffer[MAXBUF];
1664         va_list argsPtr;
1665
1666         va_start(argsPtr, text);
1667         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1668         va_end(argsPtr);
1669
1670         this->WriteWallOps(std::string(textbuffer));
1671 }
1672
1673 /* return 0 or 1 depending if users u and u2 share one or more common channels
1674  * (used by QUIT, NICK etc which arent channel specific notices)
1675  *
1676  * The old algorithm in 1.0 for this was relatively inefficient, iterating over
1677  * the first users channels then the second users channels within the outer loop,
1678  * therefore it was a maximum of x*y iterations (upon returning 0 and checking
1679  * all possible iterations). However this new function instead checks against the
1680  * channel's userlist in the inner loop which is a std::map<userrec*,userrec*>
1681  * and saves us time as we already know what pointer value we are after.
1682  * Don't quote me on the maths as i am not a mathematician or computer scientist,
1683  * but i believe this algorithm is now x+(log y) maximum iterations instead.
1684  */
1685 bool userrec::SharesChannelWith(userrec *other)
1686 {
1687         if ((!other) || (this->registered != REG_ALL) || (other->registered != REG_ALL))
1688                 return false;
1689
1690         /* Outer loop */
1691         for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1692         {
1693                 /* Eliminate the inner loop (which used to be ~equal in size to the outer loop)
1694                  * by replacing it with a map::find which *should* be more efficient
1695                  */
1696                 if (i->first->HasUser(other))
1697                         return true;
1698         }
1699         return false;
1700 }
1701
1702 bool userrec::ChangeName(const char* gecos)
1703 {
1704         if (!strcmp(gecos, this->fullname))
1705                 return true;
1706
1707         if (IS_LOCAL(this))
1708         {
1709                 int MOD_RESULT = 0;
1710                 FOREACH_RESULT(I_OnChangeLocalUserGECOS,OnChangeLocalUserGECOS(this,gecos));
1711                 if (MOD_RESULT)
1712                         return false;
1713                 FOREACH_MOD(I_OnChangeName,OnChangeName(this,gecos));
1714         }
1715         strlcpy(this->fullname,gecos,MAXGECOS+1);
1716
1717         return true;
1718 }
1719
1720 bool userrec::ChangeDisplayedHost(const char* host)
1721 {
1722         if (!strcmp(host, this->dhost))
1723                 return true;
1724
1725         if (IS_LOCAL(this))
1726         {
1727                 int MOD_RESULT = 0;
1728                 FOREACH_RESULT(I_OnChangeLocalUserHost,OnChangeLocalUserHost(this,host));
1729                 if (MOD_RESULT)
1730                         return false;
1731                 FOREACH_MOD(I_OnChangeHost,OnChangeHost(this,host));
1732         }
1733         if (this->ServerInstance->Config->CycleHosts)
1734                 this->WriteCommonExcept("QUIT :Changing hosts");
1735
1736         /* Fix by Om: userrec::dhost is 65 long, this was truncating some long hosts */
1737         strlcpy(this->dhost,host,64);
1738
1739         this->InvalidateCache();
1740
1741         if (this->ServerInstance->Config->CycleHosts)
1742         {
1743                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1744                 {
1745                         i->first->WriteAllExceptSender(this, false, 0, "JOIN %s", i->first->name);
1746                         std::string n = this->ServerInstance->Modes->ModeString(this, i->first);
1747                         if (n.length() > 0)
1748                                 i->first->WriteAllExceptSender(this, true, 0, "MODE %s +%s", i->first->name, n.c_str());
1749                 }
1750         }
1751
1752         if (IS_LOCAL(this))
1753                 this->WriteServ("396 %s %s :is now your displayed host",this->nick,this->dhost);
1754
1755         return true;
1756 }
1757
1758 bool userrec::ChangeIdent(const char* newident)
1759 {
1760         if (!strcmp(newident, this->ident))
1761                 return true;
1762
1763         if (this->ServerInstance->Config->CycleHosts)
1764                 this->WriteCommonExcept("%s","QUIT :Changing ident");
1765
1766         strlcpy(this->ident, newident, IDENTMAX+2);
1767
1768         this->InvalidateCache();
1769
1770         if (this->ServerInstance->Config->CycleHosts)
1771         {
1772                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1773                 {
1774                         i->first->WriteAllExceptSender(this, false, 0, "JOIN %s", i->first->name);
1775                         std::string n = this->ServerInstance->Modes->ModeString(this, i->first);
1776                         if (n.length() > 0)
1777                                 i->first->WriteAllExceptSender(this, true, 0, "MODE %s +%s", i->first->name, n.c_str());
1778                 }
1779         }
1780
1781         return true;
1782 }
1783
1784 void userrec::SendAll(const char* command, char* text, ...)
1785 {
1786         char textbuffer[MAXBUF];
1787         char formatbuffer[MAXBUF];
1788         va_list argsPtr;
1789
1790         va_start(argsPtr, text);
1791         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1792         va_end(argsPtr);
1793
1794         snprintf(formatbuffer,MAXBUF,":%s %s $* :%s", this->GetFullHost(), command, textbuffer);
1795         std::string fmt = formatbuffer;
1796
1797         for (std::vector<userrec*>::const_iterator i = ServerInstance->local_users.begin(); i != ServerInstance->local_users.end(); i++)
1798         {
1799                 (*i)->Write(fmt);
1800         }
1801 }
1802
1803
1804 std::string userrec::ChannelList(userrec* source)
1805 {
1806         try
1807         {
1808                 std::string list;
1809                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1810                 {
1811                         /* If the target is the same as the sender, let them see all their channels.
1812                          * If the channel is NOT private/secret OR the user shares a common channel
1813                          * If the user is an oper, and the <options:operspywhois> option is set.
1814                          */
1815                         if ((source == this) || (IS_OPER(source) && ServerInstance->Config->OperSpyWhois) || (((!i->first->IsModeSet('p')) && (!i->first->IsModeSet('s'))) || (i->first->HasUser(source))))
1816                         {
1817                                 list.append(i->first->GetPrefixChar(this)).append(i->first->name).append(" ");
1818                         }
1819                 }
1820                 return list;
1821         }
1822         catch (...)
1823         {
1824                 ServerInstance->Log(DEBUG,"Exception in userrec::ChannelList()");
1825                 return "";
1826         }
1827 }
1828
1829 void userrec::SplitChanList(userrec* dest, const std::string &cl)
1830 {
1831         std::string line;
1832         std::ostringstream prefix;
1833         std::string::size_type start, pos, length;
1834
1835         try
1836         {
1837                 prefix << this->nick << " " << dest->nick << " :";
1838                 line = prefix.str();
1839                 int namelen = strlen(ServerInstance->Config->ServerName) + 6;
1840
1841                 for (start = 0; (pos = cl.find(' ', start)) != std::string::npos; start = pos+1)
1842                 {
1843                         length = (pos == std::string::npos) ? cl.length() : pos;
1844
1845                         if (line.length() + namelen + length - start > 510)
1846                         {
1847                                 ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1848                                 line = prefix.str();
1849                         }
1850
1851                         if(pos == std::string::npos)
1852                         {
1853                                 line.append(cl.substr(start, length - start));
1854                                 break;
1855                         }
1856                         else
1857                         {
1858                                 line.append(cl.substr(start, length - start + 1));
1859                         }
1860                 }
1861
1862                 if (line.length())
1863                 {
1864                         ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1865                 }
1866         }
1867
1868         catch (...)
1869         {
1870                 ServerInstance->Log(DEBUG,"Exception in userrec::SplitChanList()");
1871         }
1872 }
1873
1874 unsigned int userrec::GetMaxChans()
1875 {
1876         return this->MaxChans;
1877 }
1878
1879 /* looks up a users password for their connection class (<ALLOW>/<DENY> tags)
1880  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1881  * then their ip will be taken as 'priority' anyway, so for example,
1882  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1883  */
1884 ConnectClass* userrec::GetClass(const std::string &explicit_name)
1885 {
1886         if (!explicit_name.empty())
1887         {
1888                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1889                 {
1890                         if (explicit_name == i->GetName())
1891                                 return &(*i);
1892                 }
1893         }
1894         else
1895         {
1896                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1897                 {
1898                         if (((match(this->GetIPString(),i->GetHost().c_str(),true)) || (match(this->host,i->GetHost().c_str()))))
1899                         {
1900                                 if (i->GetPort())
1901                                 {
1902                                         if (this->GetPort() == i->GetPort())
1903                                                 return &(*i);
1904                                         else
1905                                                 continue;
1906                                 }
1907                                 else
1908                                         return &(*i);
1909                         }
1910                 }
1911         }
1912         return NULL;
1913 }
1914
1915 void userrec::PurgeEmptyChannels()
1916 {
1917         std::vector<chanrec*> to_delete;
1918
1919         // firstly decrement the count on each channel
1920         for (UCListIter f = this->chans.begin(); f != this->chans.end(); f++)
1921         {
1922                 f->first->RemoveAllPrefixes(this);
1923                 if (f->first->DelUser(this) == 0)
1924                 {
1925                         /* No users left in here, mark it for deletion */
1926                         try
1927                         {
1928                                 to_delete.push_back(f->first);
1929                         }
1930                         catch (...)
1931                         {
1932                                 ServerInstance->Log(DEBUG,"Exception in userrec::PurgeEmptyChannels to_delete.push_back()");
1933                         }
1934                 }
1935         }
1936
1937         for (std::vector<chanrec*>::iterator n = to_delete.begin(); n != to_delete.end(); n++)
1938         {
1939                 chanrec* thischan = *n;
1940                 chan_hash::iterator i2 = ServerInstance->chanlist->find(thischan->name);
1941                 if (i2 != ServerInstance->chanlist->end())
1942                 {
1943                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(i2->second));
1944                         DELETE(i2->second);
1945                         ServerInstance->chanlist->erase(i2);
1946                         this->chans.erase(*n);
1947                 }
1948         }
1949
1950         this->UnOper();
1951 }
1952
1953 void userrec::ShowMOTD()
1954 {
1955         if (!ServerInstance->Config->MOTD.size())
1956         {
1957                 this->WriteServ("422 %s :Message of the day file is missing.",this->nick);
1958                 return;
1959         }
1960         this->WriteServ("375 %s :%s message of the day", this->nick, ServerInstance->Config->ServerName);
1961
1962         for (file_cache::iterator i = ServerInstance->Config->MOTD.begin(); i != ServerInstance->Config->MOTD.end(); i++)
1963                 this->WriteServ("372 %s :- %s",this->nick,i->c_str());
1964
1965         this->WriteServ("376 %s :End of message of the day.", this->nick);
1966 }
1967
1968 void userrec::ShowRULES()
1969 {
1970         if (!ServerInstance->Config->RULES.size())
1971         {
1972                 this->WriteServ("434 %s :RULES File is missing",this->nick);
1973                 return;
1974         }
1975
1976         this->WriteServ("308 %s :- %s Server Rules -",this->nick,ServerInstance->Config->ServerName);
1977
1978         for (file_cache::iterator i = ServerInstance->Config->RULES.begin(); i != ServerInstance->Config->RULES.end(); i++)
1979                 this->WriteServ("232 %s :- %s",this->nick,i->c_str());
1980
1981         this->WriteServ("309 %s :End of RULES command.",this->nick);
1982 }
1983
1984 void userrec::HandleEvent(EventType et, int errornum)
1985 {
1986         /* WARNING: May delete this user! */
1987         int thisfd = this->GetFd();
1988
1989         try
1990         {
1991                 switch (et)
1992                 {
1993                         case EVENT_READ:
1994                                 ServerInstance->ProcessUser(this);
1995                         break;
1996                         case EVENT_WRITE:
1997                                 this->FlushWriteBuf();
1998                         break;
1999                         case EVENT_ERROR:
2000                                 /** This should be safe, but dont DARE do anything after it -- Brain */
2001                                 this->SetWriteError(errornum ? strerror(errornum) : "EOF from client");
2002                         break;
2003                 }
2004         }
2005         catch (...)
2006         {
2007                 ServerInstance->Log(DEBUG,"Exception in userrec::HandleEvent intercepted");
2008         }
2009
2010         /* If the user has raised an error whilst being processed, quit them now we're safe to */
2011         if ((ServerInstance->SE->GetRef(thisfd) == this))
2012         {
2013                 if (!WriteError.empty())
2014                 {
2015                         userrec::QuitUser(ServerInstance, this, GetWriteError());
2016                 }
2017         }
2018 }
2019
2020 void userrec::SetOperQuit(const std::string &oquit)
2021 {
2022         if (operquit)
2023                 return;
2024
2025         operquit = strdup(oquit.c_str());
2026 }
2027
2028 const char* userrec::GetOperQuit()
2029 {
2030         return operquit ? operquit : "";
2031 }
2032
2033 VisData::VisData()
2034 {
2035 }
2036
2037 VisData::~VisData()
2038 {
2039 }
2040
2041 bool VisData::VisibleTo(userrec* user)
2042 {
2043         return true;
2044 }
2045