src/users.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
   6  *                     E-mail:
   7  *              <brain@chatspike.net>
   8  *                <Craig@chatspike.net>
   9  *
  10  * Written by Craig Edwards, Craig McLure, and others.
  11  * This program is free but copyrighted software; see
  12  *          the file COPYING for details.
  13  *
  14  * ---------------------------------------------------
  15  */
  16
  17 #include "configreader.h"
  18 #include "channels.h"
  19 #include "users.h"
  20 #include "inspircd.h"
  21 #include <stdarg.h>
  22 #include "socketengine.h"
  23 #include "wildcard.h"
  24 #include "xline.h"
  25 #include "cull_list.h"
  26
  27 static unsigned long already_sent[MAX_DESCRIPTORS] = {0};
  28
  29 /* XXX: Used for speeding up WriteCommon operations */
  30 unsigned long uniq_id = 0;
  31
  32 bool InitTypes(ServerConfig* conf, const char* tag)
  33 {
  34         if (conf->opertypes.size())
  35         {
  36                 conf->GetInstance()->Log(DEBUG,"Currently %d items to clear",conf->opertypes.size());
  37                 for (opertype_t::iterator n = conf->opertypes.begin(); n != conf->opertypes.end(); n++)
  38                 {
  39                         conf->GetInstance()->Log(DEBUG,"Clear item");
  40                         if (n->second)
  41                                 delete[] n->second;
  42                 }
  43         }
  44
  45         conf->opertypes.clear();
  46         return true;
  47 }
  48
  49 bool InitClasses(ServerConfig* conf, const char* tag)
  50 {
  51         if (conf->operclass.size())
  52         {
  53                 for (operclass_t::iterator n = conf->operclass.begin(); n != conf->operclass.end(); n++)
  54                 {
  55                         if (n->second)
  56                                 delete[] n->second;
  57                 }
  58         }
  59
  60         conf->operclass.clear();
  61         return true;
  62 }
  63
  64 bool DoType(ServerConfig* conf, const char* tag, char** entries, void** values, int* types)
  65 {
  66         char* TypeName = (char*)values[0];
  67         char* Classes = (char*)values[1];
  68
  69         conf->opertypes[TypeName] = strdup(Classes);
  70         conf->GetInstance()->Log(DEBUG,"Read oper TYPE '%s' with classes '%s'",TypeName,Classes);
  71         return true;
  72 }
  73
  74 bool DoClass(ServerConfig* conf, const char* tag, char** entries, void** values, int* types)
  75 {
  76         char* ClassName = (char*)values[0];
  77         char* CommandList = (char*)values[1];
  78
  79         conf->operclass[ClassName] = strdup(CommandList);
  80         conf->GetInstance()->Log(DEBUG,"Read oper CLASS '%s' with commands '%s'",ClassName,CommandList);
  81         return true;
  82 }
  83
  84 bool DoneClassesAndTypes(ServerConfig* conf, const char* tag)
  85 {
  86         return true;
  87 }
  88
  89 std::string userrec::ProcessNoticeMasks(const char *sm)
  90 {
  91         bool adding = true, oldadding = false;
  92         const char *c = sm;
  93         std::string output;
  94
  95         ServerInstance->Log(DEBUG,"Process notice masks");
  96
  97         while (c && *c)
  98         {
  99                 ServerInstance->Log(DEBUG,"Process notice mask %c",*c);
 100
 101                 switch (*c)
 102                 {
 103                         case '+':
 104                                 adding = true;
 105                         break;
 106                         case '-':
 107                                 adding = false;
 108                         break;
 109                         case '*':
 110                                 for (unsigned char d = 'A'; d <= 'z'; d++)
 111                                 {
 112                                         if (ServerInstance->SNO->IsEnabled(d))
 113                                         {
 114                                                 if ((!IsNoticeMaskSet(d) && adding) || (IsNoticeMaskSet(d) && !adding))
 115                                                 {
 116                                                         if ((oldadding != adding) || (!output.length()))
 117                                                                 output += (adding ? '+' : '-');
 118
 119                                                         this->SetNoticeMask(d, adding);
 120
 121                                                         output += d;
 122                                                 }
 123                                         }
 124                                         oldadding = adding;
 125                                 }
 126                         break;
 127                         default:
 128                                 if ((*c >= 'A') && (*c <= 'z') && (ServerInstance->SNO->IsEnabled(*c)))
 129                                 {
 130                                         if ((!IsNoticeMaskSet(*c) && adding) || (IsNoticeMaskSet(*c) && !adding))
 131                                         {
 132                                                 if ((oldadding != adding) || (!output.length()))
 133                                                         output += (adding ? '+' : '-');
 134
 135                                                 this->SetNoticeMask(*c, adding);
 136
 137                                                 output += *c;
 138                                         }
 139                                 }
 140                                 oldadding = adding;
 141                         break;
 142                 }
 143
 144                 *c++;
 145         }
 146
 147         return output;
 148 }
 149
 150 void userrec::StartDNSLookup()
 151 {
 152         ServerInstance->Log(DEBUG,"Commencing reverse lookup");
 153         try
 154         {
 155                 ServerInstance->Log(DEBUG,"Passing instance: %08x",this->ServerInstance);
 156                 res_reverse = new UserResolver(this->ServerInstance, this, this->GetIPString(), false);
 157                 this->ServerInstance->AddResolver(res_reverse);
 158         }
 159         catch (ModuleException& e)
 160         {
 161                 ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
 162         }
 163 }
 164
 165 UserResolver::UserResolver(InspIRCd* Instance, userrec* user, std::string to_resolve, bool forward) :
 166         Resolver(Instance, to_resolve, forward ? DNS_QUERY_FORWARD : DNS_QUERY_REVERSE), bound_user(user)
 167 {
 168         this->fwd = forward;
 169         this->bound_fd = user->GetFd();
 170 }
 171
 172 void UserResolver::OnLookupComplete(const std::string &result)
 173 {
 174         if ((!this->fwd) && (ServerInstance->SE->GetRef(this->bound_fd) == this->bound_user))
 175         {
 176                 ServerInstance->Log(DEBUG,"Commencing forward lookup");
 177                 this->bound_user->stored_host = result;
 178                 try
 179                 {
 180                         /* Check we didnt time out */
 181                         if (this->bound_user->registered != REG_ALL)
 182                         {
 183                                 bound_user->res_forward = new UserResolver(this->ServerInstance, this->bound_user, result, true);
 184                                 this->ServerInstance->AddResolver(bound_user->res_forward);
 185                         }
 186                 }
 187                 catch (ModuleException& e)
 188                 {
 189                         ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
 190                 }
 191         }
 192         else if ((this->fwd) && (ServerInstance->SE->GetRef(this->bound_fd) == this->bound_user))
 193         {
 194                 /* Both lookups completed */
 195                 if (this->bound_user->GetIPString() == result)
 196                 {
 197                         std::string hostname = this->bound_user->stored_host;
 198                         if (hostname.length() < 65)
 199                         {
 200                                 /* Check we didnt time out */
 201                                 if (this->bound_user->registered != REG_ALL)
 202                                 {
 203                                         /* Hostnames starting with : are not a good thing (tm) */
 204                                         if (*(hostname.c_str()) == ':')
 205                                                 hostname = "0" + hostname;
 206
 207                                         this->bound_user->WriteServ("NOTICE Auth :*** Found your hostname (%s)", hostname.c_str());
 208                                         this->bound_user->dns_done = true;
 209                                         strlcpy(this->bound_user->dhost, hostname.c_str(),64);
 210                                         strlcpy(this->bound_user->host, hostname.c_str(),64);
 211                                 }
 212                         }
 213                         else
 214                         {
 215                                 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());
 216                         }
 217                 }
 218                 else
 219                 {
 220                         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());
 221                 }
 222         }
 223 }
 224
 225 void UserResolver::OnError(ResolverError e, const std::string &errormessage)
 226 {
 227         if (ServerInstance->SE->GetRef(this->bound_fd) == this->bound_user)
 228         {
 229                 /* Error message here */
 230                 this->bound_user->WriteServ("NOTICE Auth :*** Could not resolve your hostname, using your IP address (%s) instead.", this->bound_user->GetIPString());
 231                 this->bound_user->dns_done = true;
 232         }
 233 }
 234
 235
 236 bool userrec::IsNoticeMaskSet(unsigned char sm)
 237 {
 238         return (snomasks[sm-65]);
 239 }
 240
 241 void userrec::SetNoticeMask(unsigned char sm, bool value)
 242 {
 243         snomasks[sm-65] = value;
 244 }
 245
 246 const char* userrec::FormatNoticeMasks()
 247 {
 248         static char data[MAXBUF];
 249         int offset = 0;
 250
 251         for (int n = 0; n < 64; n++)
 252         {
 253                 if (snomasks[n])
 254                         data[offset++] = n+65;
 255         }
 256
 257         data[offset] = 0;
 258         return data;
 259 }
 260
 261
 262
 263 bool userrec::IsModeSet(unsigned char m)
 264 {
 265         return (modes[m-65]);
 266 }
 267
 268 void userrec::SetMode(unsigned char m, bool value)
 269 {
 270         modes[m-65] = value;
 271 }
 272
 273 const char* userrec::FormatModes()
 274 {
 275         static char data[MAXBUF];
 276         int offset = 0;
 277         for (int n = 0; n < 64; n++)
 278         {
 279                 if (modes[n])
 280                         data[offset++] = n+65;
 281         }
 282         data[offset] = 0;
 283         return data;
 284 }
 285
 286 userrec::userrec(InspIRCd* Instance) : ServerInstance(Instance)
 287 {
 288         ServerInstance->Log(DEBUG,"userrec::userrec(): Instance: %08x",ServerInstance);
 289         // the PROPER way to do it, AVOID bzero at *ALL* costs
 290         *password = *nick = *ident = *host = *dhost = *fullname = *awaymsg = *oper = 0;
 291         server = (char*)Instance->FindServerNamePtr(Instance->Config->ServerName);
 292         reset_due = ServerInstance->Time();
 293         lines_in = lastping = signon = idle_lastmsg = nping = registered = 0;
 294         ChannelCount = timeout = flood = bytes_in = bytes_out = cmds_in = cmds_out = 0;
 295         haspassed = dns_done = false;
 296         fd = -1;
 297         recvq = "";
 298         sendq = "";
 299         WriteError = "";
 300         res_forward = res_reverse = NULL;
 301         ip = NULL;
 302         chans.clear();
 303         invites.clear();
 304         chans.resize(MAXCHANS);
 305         memset(modes,0,sizeof(modes));
 306         memset(snomasks,0,sizeof(snomasks));
 307
 308         for (unsigned int n = 0; n < MAXCHANS; n++)
 309         {
 310                 chans[n] = new ucrec();
 311                 chans[n]->channel = NULL;
 312                 chans[n]->uc_modes = 0;
 313         }
 314 }
 315
 316 userrec::~userrec()
 317 {
 318         for (std::vector<ucrec*>::iterator n = chans.begin(); n != chans.end(); n++)
 319         {
 320                 ucrec* x = (ucrec*)*n;
 321                 delete x;
 322         }
 323
 324         if (ip)
 325         {
 326                 if (this->GetProtocolFamily() == AF_INET)
 327                 {
 328                         delete (sockaddr_in*)ip;
 329                 }
 330 #ifdef SUPPORT_IP6LINKS
 331                 else
 332                 {
 333                         delete (sockaddr_in6*)ip;
 334                 }
 335 #endif
 336         }
 337 }
 338
 339 /* XXX - minor point, other *Host functions return a char *, this one creates it. Might be nice to be consistant? */
 340 void userrec::MakeHost(char* nhost)
 341 {
 342         /* This is much faster than snprintf */
 343         char* t = nhost;
 344         for(char* n = ident; *n; n++)
 345                 *t++ = *n;
 346         *t++ = '@';
 347         for(char* n = host; *n; n++)
 348                 *t++ = *n;
 349         *t = 0;
 350 }
 351
 352 void userrec::CloseSocket()
 353 {
 354         shutdown(this->fd,2);
 355         close(this->fd);
 356 }
 357
 358 char* userrec::GetFullHost()
 359 {
 360         static char result[MAXBUF];
 361         char* t = result;
 362         for(char* n = nick; *n; n++)
 363                 *t++ = *n;
 364         *t++ = '!';
 365         for(char* n = ident; *n; n++)
 366                 *t++ = *n;
 367         *t++ = '@';
 368         for(char* n = dhost; *n; n++)
 369                 *t++ = *n;
 370         *t = 0;
 371         return result;
 372 }
 373
 374 char* userrec::MakeWildHost()
 375 {
 376         static char nresult[MAXBUF];
 377         char* t = nresult;
 378         *t++ = '*';     *t++ = '!';
 379         *t++ = '*';     *t++ = '@';
 380         for(char* n = dhost; *n; n++)
 381                 *t++ = *n;
 382         *t = 0;
 383         return nresult;
 384 }
 385
 386 int userrec::ReadData(void* buffer, size_t size)
 387 {
 388         if (IS_LOCAL(this))
 389         {
 390                 return read(this->fd, buffer, size);
 391         }
 392         else
 393                 return 0;
 394 }
 395
 396
 397 char* userrec::GetFullRealHost()
 398 {
 399         static char fresult[MAXBUF];
 400         char* t = fresult;
 401         for(char* n = nick; *n; n++)
 402                 *t++ = *n;
 403         *t++ = '!';
 404         for(char* n = ident; *n; n++)
 405                 *t++ = *n;
 406         *t++ = '@';
 407         for(char* n = host; *n; n++)
 408                 *t++ = *n;
 409         *t = 0;
 410         return fresult;
 411 }
 412
 413 bool userrec::IsInvited(irc::string &channel)
 414 {
 415         for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 416         {
 417                 irc::string compare = i->channel;
 418
 419                 if (compare == channel)
 420                 {
 421                         return true;
 422                 }
 423         }
 424         return false;
 425 }
 426
 427 InvitedList* userrec::GetInviteList()
 428 {
 429         return &invites;
 430 }
 431
 432 void userrec::InviteTo(irc::string &channel)
 433 {
 434         Invited i;
 435         i.channel = channel;
 436         invites.push_back(i);
 437 }
 438
 439 void userrec::RemoveInvite(irc::string &channel)
 440 {
 441         ServerInstance->Log(DEBUG,"Removing invites");
 442
 443         if (invites.size())
 444         {
 445                 for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 446                 {
 447                         irc::string compare = i->channel;
 448
 449                         if (compare == channel)
 450                         {
 451                                 invites.erase(i);
 452                                 return;
 453                         }
 454                 }
 455         }
 456 }
 457
 458 bool userrec::HasPermission(const std::string &command)
 459 {
 460         char* mycmd;
 461         char* savept;
 462         char* savept2;
 463
 464         /*
 465          * users on remote servers can completely bypass all permissions based checks.
 466          * This prevents desyncs when one server has different type/class tags to another.
 467          * That having been said, this does open things up to the possibility of source changes
 468          * allowing remote kills, etc - but if they have access to the src, they most likely have
 469          * access to the conf - so it's an end to a means either way.
 470          */
 471         if (!IS_LOCAL(this))
 472                 return true;
 473
 474         // are they even an oper at all?
 475         if (*this->oper)
 476         {
 477                 opertype_t::iterator iter_opertype = ServerInstance->Config->opertypes.find(this->oper);
 478                 if (iter_opertype != ServerInstance->Config->opertypes.end())
 479                 {
 480                         char* Classes = strdup(iter_opertype->second);
 481                         char* myclass = strtok_r(Classes," ",&savept);
 482                         while (myclass)
 483                         {
 484                                 operclass_t::iterator iter_operclass = ServerInstance->Config->operclass.find(myclass);
 485                                 if (iter_operclass != ServerInstance->Config->operclass.end())
 486                                 {
 487                                         char* CommandList = strdup(iter_operclass->second);
 488                                         mycmd = strtok_r(CommandList," ",&savept2);
 489                                         while (mycmd)
 490                                         {
 491                                                 if ((!strcasecmp(mycmd,command.c_str())) || (*mycmd == '*'))
 492                                                 {
 493                                                         free(Classes);
 494                                                         free(CommandList);
 495                                                         return true;
 496                                                 }
 497                                                 mycmd = strtok_r(NULL," ",&savept2);
 498                                         }
 499                                         free(CommandList);
 500                                 }
 501                                 myclass = strtok_r(NULL," ",&savept);
 502                         }
 503                         free(Classes);
 504                 }
 505         }
 506         return false;
 507 }
 508
 509 /** NOTE: We cannot pass a const reference to this method.
 510  * The string is changed by the workings of the method,
 511  * so that if we pass const ref, we end up copying it to
 512  * something we can change anyway. Makes sense to just let
 513  * the compiler do that copy for us.
 514  */
 515 bool userrec::AddBuffer(std::string a)
 516 {
 517         try
 518         {
 519                 std::string::size_type i = a.rfind('\r');
 520
 521                 while (i != std::string::npos)
 522                 {
 523                         a.erase(i, 1);
 524                         i = a.rfind('\r');
 525                 }
 526
 527                 if (a.length())
 528                         recvq.append(a);
 529
 530                 if (recvq.length() > (unsigned)this->recvqmax)
 531                 {
 532                         this->SetWriteError("RecvQ exceeded");
 533                         ServerInstance->WriteOpers("*** User %s RecvQ of %d exceeds connect class maximum of %d",this->nick,recvq.length(),this->recvqmax);
 534                         return false;
 535                 }
 536
 537                 return true;
 538         }
 539
 540         catch (...)
 541         {
 542                 ServerInstance->Log(DEBUG,"Exception in userrec::AddBuffer()");
 543                 return false;
 544         }
 545 }
 546
 547 bool userrec::BufferIsReady()
 548 {
 549         return (recvq.find('\n') != std::string::npos);
 550 }
 551
 552 void userrec::ClearBuffer()
 553 {
 554         recvq = "";
 555 }
 556
 557 std::string userrec::GetBuffer()
 558 {
 559         try
 560         {
 561                 if (!recvq.length())
 562                         return "";
 563
 564                 /* Strip any leading \r or \n off the string.
 565                  * Usually there are only one or two of these,
 566                  * so its is computationally cheap to do.
 567                  */
 568                 while ((*recvq.begin() == '\r') || (*recvq.begin() == '\n'))
 569                         recvq.erase(recvq.begin());
 570
 571                 for (std::string::iterator x = recvq.begin(); x != recvq.end(); x++)
 572                 {
 573                         /* Find the first complete line, return it as the
 574                          * result, and leave the recvq as whats left
 575                          */
 576                         if (*x == '\n')
 577                         {
 578                                 std::string ret = std::string(recvq.begin(), x);
 579                                 recvq.erase(recvq.begin(), x + 1);
 580                                 return ret;
 581                         }
 582                 }
 583                 return "";
 584         }
 585
 586         catch (...)
 587         {
 588                 ServerInstance->Log(DEBUG,"Exception in userrec::GetBuffer()");
 589                 return "";
 590         }
 591 }
 592
 593 void userrec::AddWriteBuf(const std::string &data)
 594 {
 595         if (*this->GetWriteError())
 596                 return;
 597
 598         if (sendq.length() + data.length() > (unsigned)this->sendqmax)
 599         {
 600                 /*
 601                  * Fix by brain - Set the error text BEFORE calling writeopers, because
 602                  * if we dont it'll recursively  call here over and over again trying
 603                  * to repeatedly add the text to the sendq!
 604                  */
 605                 this->SetWriteError("SendQ exceeded");
 606                 ServerInstance->WriteOpers("*** User %s SendQ of %d exceeds connect class maximum of %d",this->nick,sendq.length() + data.length(),this->sendqmax);
 607                 return;
 608         }
 609
 610         try
 611         {
 612                 if (data.length() > 512)
 613                 {
 614                         std::string newdata(data);
 615                         newdata.resize(510);
 616                         newdata.append("\r\n");
 617                         sendq.append(newdata);
 618                 }
 619                 else
 620                 {
 621                         sendq.append(data);
 622                 }
 623         }
 624         catch (...)
 625         {
 626                 this->SetWriteError("SendQ exceeded");
 627                 ServerInstance->WriteOpers("*** User %s SendQ got an exception",this->nick);
 628         }
 629 }
 630
 631 // send AS MUCH OF THE USERS SENDQ as we are able to (might not be all of it)
 632 void userrec::FlushWriteBuf()
 633 {
 634         try
 635         {
 636                 if ((this->fd == FD_MAGIC_NUMBER) || (*this->GetWriteError()))
 637                 {
 638                         sendq = "";
 639                 }
 640                 if ((sendq.length()) && (this->fd != FD_MAGIC_NUMBER))
 641                 {
 642                         int old_sendq_length = sendq.length();
 643                         const char* tb = this->sendq.c_str();
 644                         int n_sent = write(this->fd,tb,this->sendq.length());
 645                         if (n_sent == -1)
 646                         {
 647                                 if (errno == EAGAIN)
 648                                 {
 649                                         ServerInstance->Log(DEBUG,"EAGAIN, want write");
 650                                         this->ServerInstance->SE->WantWrite(this);
 651                                 }
 652                                 else
 653                                         this->SetWriteError(strerror(errno));
 654                         }
 655                         else
 656                         {
 657                                 /*ServerInstance->Log(DEBUG,"Wrote: %d of %d: %s", n_sent, old_sendq_length, sendq.substr(0, n_sent).c_str());*/
 658                                 // advance the queue
 659                                 tb += n_sent;
 660                                 this->sendq = tb;
 661                                 // update the user's stats counters
 662                                 this->bytes_out += n_sent;
 663                                 this->cmds_out++;
 664                                 if (n_sent != old_sendq_length)
 665                                 {
 666                                         ServerInstance->Log(DEBUG,"Not all written, want write");
 667                                         this->ServerInstance->SE->WantWrite(this);
 668                                 }
 669                         }
 670                 }
 671         }
 672
 673         catch (...)
 674         {
 675                 ServerInstance->Log(DEBUG,"Exception in userrec::FlushWriteBuf()");
 676         }
 677 }
 678
 679 void userrec::SetWriteError(const std::string &error)
 680 {
 681         try
 682         {
 683                 ServerInstance->Log(DEBUG,"SetWriteError: %s",error.c_str());
 684                 // don't try to set the error twice, its already set take the first string.
 685                 if (!this->WriteError.length())
 686                 {
 687                         ServerInstance->Log(DEBUG,"Setting error string for %s to '%s'",this->nick,error.c_str());
 688                         this->WriteError = error;
 689                 }
 690         }
 691
 692         catch (...)
 693         {
 694                 ServerInstance->Log(DEBUG,"Exception in userrec::SetWriteError()");
 695         }
 696 }
 697
 698 const char* userrec::GetWriteError()
 699 {
 700         return this->WriteError.c_str();
 701 }
 702
 703 void userrec::Oper(const std::string &opertype)
 704 {
 705         try
 706         {
 707                 this->modes[UM_OPERATOR] = 1;
 708                 this->WriteServ("MODE %s :+o", this->nick);
 709                 FOREACH_MOD(I_OnOper, OnOper(this, opertype));
 710                 ServerInstance->Log(DEFAULT,"OPER: %s!%s@%s opered as type: %s", this->nick, this->ident, this->host, opertype.c_str());
 711                 strlcpy(this->oper, opertype.c_str(), NICKMAX - 1);
 712                 ServerInstance->all_opers.push_back(this);
 713                 FOREACH_MOD(I_OnPostOper,OnPostOper(this, opertype));
 714         }
 715
 716         catch (...)
 717         {
 718                 ServerInstance->Log(DEBUG,"Exception in userrec::Oper()");
 719         }
 720 }
 721
 722 void userrec::UnOper()
 723 {
 724         try
 725         {
 726                 if (*this->oper)
 727                 {
 728                         *this->oper = 0;
 729                         this->modes[UM_OPERATOR] = 0;
 730                         for (std::vector<userrec*>::iterator a = ServerInstance->all_opers.begin(); a < ServerInstance->all_opers.end(); a++)
 731                         {
 732                                 if (*a == this)
 733                                 {
 734                                         ServerInstance->Log(DEBUG,"Oper removed from optimization list");
 735                                         ServerInstance->all_opers.erase(a);
 736                                         return;
 737                                 }
 738                         }
 739                 }
 740         }
 741
 742         catch (...)
 743         {
 744                 ServerInstance->Log(DEBUG,"Exception in userrec::UnOper()");
 745         }
 746 }
 747
 748 void userrec::QuitUser(InspIRCd* Instance, userrec *user, const std::string &quitreason)
 749 {
 750         user_hash::iterator iter = Instance->clientlist.find(user->nick);
 751         std::string reason = quitreason;
 752
 753         if (reason.length() > MAXQUIT - 1)
 754                 reason.resize(MAXQUIT - 1);
 755
 756         if (IS_LOCAL(user))
 757                 user->Write("ERROR :Closing link (%s@%s) [%s]",user->ident,user->host,reason.c_str());
 758
 759         if (user->registered == REG_ALL)
 760         {
 761                 user->PurgeEmptyChannels();
 762                 FOREACH_MOD_I(Instance,I_OnUserQuit,OnUserQuit(user,reason));
 763                 user->WriteCommonExcept("QUIT :%s",reason.c_str());
 764         }
 765
 766         if (IS_LOCAL(user))
 767                 user->FlushWriteBuf();
 768
 769         FOREACH_MOD_I(Instance,I_OnUserDisconnect,OnUserDisconnect(user));
 770
 771         if (IS_LOCAL(user))
 772         {
 773                 if (Instance->Config->GetIOHook(user->GetPort()))
 774                 {
 775                         try
 776                         {
 777                                 Instance->Config->GetIOHook(user->GetPort())->OnRawSocketClose(user->fd);
 778                         }
 779                         catch (ModuleException& modexcept)
 780                         {
 781                                 Instance->Log(DEBUG,"Module exception cought: %s",modexcept.GetReason());
 782                         }
 783                 }
 784
 785                 Instance->SE->DelFd(user);
 786                 user->CloseSocket();
 787         }
 788
 789         /*
 790          * this must come before the ServerInstance->SNO->WriteToSnoMaskso that it doesnt try to fill their buffer with anything
 791          * if they were an oper with +sn +qQ.
 792          */
 793         if (user->registered == REG_ALL)
 794         {
 795                 if (IS_LOCAL(user))
 796                         Instance->SNO->WriteToSnoMask('q',"Client exiting: %s!%s@%s [%s]",user->nick,user->ident,user->host,reason.c_str());
 797                 else
 798                         Instance->SNO->WriteToSnoMask('Q',"Client exiting on server %s: %s!%s@%s [%s]",user->server,user->nick,user->ident,user->host,reason.c_str());
 799                 user->AddToWhoWas();
 800         }
 801
 802         if (iter != Instance->clientlist.end())
 803         {
 804                 Instance->Log(DEBUG,"deleting user hash value %lx",(unsigned long)user);
 805                 if (IS_LOCAL(user))
 806                 {
 807                         if (find(Instance->local_users.begin(),Instance->local_users.end(),user) != Instance->local_users.end())
 808                                 Instance->local_users.erase(find(Instance->local_users.begin(),Instance->local_users.end(),user));
 809                 }
 810                 Instance->clientlist.erase(iter);
 811                 DELETE(user);
 812         }
 813 }
 814
 815 namespace irc
 816 {
 817         namespace whowas
 818         {
 819
 820                 WhoWasGroup::WhoWasGroup(userrec* user) : host(NULL), dhost(NULL), ident(NULL), server(NULL), gecos(NULL), signon(user->signon)
 821                 {
 822                         this->host = strdup(user->host);
 823                         this->dhost = strdup(user->dhost);
 824                         this->ident = strdup(user->ident);
 825                         this->server = user->server;
 826                         this->gecos = strdup(user->fullname);
 827                 }
 828
 829                 WhoWasGroup::~WhoWasGroup()
 830                 {
 831                         if (host)
 832                                 free(host);
 833                         if (dhost)
 834                                 free(dhost);
 835                         if (ident)
 836                                 free(ident);
 837                         if (gecos)
 838                                 free(gecos);
 839                 }
 840
 841                 /* every hour, run this function which removes all entries over 3 days */
 842                 void MaintainWhoWas(InspIRCd* ServerInstance, time_t t)
 843                 {
 844                         for (whowas_users::iterator iter = ServerInstance->whowas.begin(); iter != ServerInstance->whowas.end(); iter++)
 845                         {
 846                                 whowas_set* n = (whowas_set*)iter->second;
 847                                 if (n->size())
 848                                 {
 849                                         while ((n->begin() != n->end()) && ((*n->begin())->signon < t - 259200)) // 3 days
 850                                         {
 851                                                 WhoWasGroup *a = *(n->begin());
 852                                                 DELETE(a);
 853                                                 n->erase(n->begin());
 854                                         }
 855                                 }
 856                         }
 857                 }
 858         };
 859 };
 860
 861 /* adds or updates an entry in the whowas list */
 862 void userrec::AddToWhoWas()
 863 {
 864         irc::whowas::whowas_users::iterator iter = ServerInstance->whowas.find(this->nick);
 865
 866         ServerInstance->Log(DEBUG,"Add to whowas lists");
 867
 868         if (iter == ServerInstance->whowas.end())
 869         {
 870                 ServerInstance->Log(DEBUG,"Adding new whowas set for %s",this->nick);
 871                 irc::whowas::whowas_set* n = new irc::whowas::whowas_set;
 872                 irc::whowas::WhoWasGroup *a = new irc::whowas::WhoWasGroup(this);
 873                 n->push_back(a);
 874                 ServerInstance->whowas[this->nick] = n;
 875         }
 876         else
 877         {
 878                 irc::whowas::whowas_set* group = (irc::whowas::whowas_set*)iter->second;
 879
 880                 ServerInstance->Log(DEBUG,"Using existing whowas group for %s",this->nick);
 881
 882                 if (group->size() > 10)
 883                 {
 884                         ServerInstance->Log(DEBUG,"Trimming existing group to ten entries for %s",this->nick);
 885                         irc::whowas::WhoWasGroup *a = (irc::whowas::WhoWasGroup*)*(group->begin());
 886                         DELETE(a);
 887                         group->pop_front();
 888                 }
 889
 890                 irc::whowas::WhoWasGroup *a = new irc::whowas::WhoWasGroup(this);
 891                 group->push_back(a);
 892         }
 893 }
 894
 895 /* add a client connection to the sockets list */
 896 void userrec::AddClient(InspIRCd* Instance, int socket, int port, bool iscached, insp_inaddr ip)
 897 {
 898         std::string tempnick = ConvToStr(socket) + "-unknown";
 899         user_hash::iterator iter = Instance->clientlist.find(tempnick);
 900         const char *ipaddr = insp_ntoa(ip);
 901         userrec* New;
 902         int j = 0;
 903
 904         /*
 905          * fix by brain.
 906          * as these nicknames are 'RFC impossible', we can be sure nobody is going to be
 907          * using one as a registered connection. As they are per fd, we can also safely assume
 908          * that we wont have collisions. Therefore, if the nick exists in the list, its only
 909          * used by a dead socket, erase the iterator so that the new client may reclaim it.
 910          * this was probably the cause of 'server ignores me when i hammer it with reconnects'
 911          * issue in earlier alphas/betas
 912          */
 913         if (iter != Instance->clientlist.end())
 914         {
 915                 userrec* goner = iter->second;
 916                 DELETE(goner);
 917                 Instance->clientlist.erase(iter);
 918         }
 919
 920         Instance->Log(DEBUG,"AddClient: %d %d %s",socket,port,ipaddr);
 921
 922         New = new userrec(Instance);
 923         Instance->clientlist[tempnick] = New;
 924         New->fd = socket;
 925         strlcpy(New->nick,tempnick.c_str(),NICKMAX-1);
 926
 927         New->server = Instance->FindServerNamePtr(Instance->Config->ServerName);
 928         /* We don't need range checking here, we KNOW 'unknown\0' will fit into the ident field. */
 929         strcpy(New->ident, "unknown");
 930
 931         New->registered = REG_NONE;
 932         New->signon = Instance->Time() + Instance->Config->dns_timeout;
 933         New->lastping = 1;
 934
 935         Instance->Log(DEBUG,"Setting socket addresses");
 936         New->SetSockAddr(AF_FAMILY, ipaddr, port);
 937         Instance->Log(DEBUG,"Socket addresses set.");
 938
 939         /* Smarter than your average bear^H^H^H^Hset of strlcpys. */
 940         for (const char* temp = New->GetIPString(); *temp && j < 64; temp++, j++)
 941                 New->dhost[j] = New->host[j] = *temp;
 942         New->dhost[j] = New->host[j] = 0;
 943
 944         Instance->Log(DEBUG,"Hosts set.");
 945
 946         // set the registration timeout for this user
 947         unsigned long class_regtimeout = 90;
 948         int class_flood = 0;
 949         long class_threshold = 5;
 950         long class_sqmax = 262144;      // 256kb
 951         long class_rqmax = 4096;        // 4k
 952
 953         Instance->Log(DEBUG,"Class stuff set.");
 954
 955         for (ClassVector::iterator i = Instance->Config->Classes.begin(); i != Instance->Config->Classes.end(); i++)
 956         {
 957                 if ((i->type == CC_ALLOW) && (match(ipaddr,i->host.c_str(),true)))
 958                 {
 959                         class_regtimeout = (unsigned long)i->registration_timeout;
 960                         class_flood = i->flood;
 961                         New->pingmax = i->pingtime;
 962                         class_threshold = i->threshold;
 963                         class_sqmax = i->sendqmax;
 964                         class_rqmax = i->recvqmax;
 965                         break;
 966                 }
 967         }
 968
 969         Instance->Log(DEBUG,"nping etc set.");
 970
 971         New->nping = Instance->Time() + New->pingmax + Instance->Config->dns_timeout;
 972         New->timeout = Instance->Time() + class_regtimeout;
 973         New->flood = class_flood;
 974         New->threshold = class_threshold;
 975         New->sendqmax = class_sqmax;
 976         New->recvqmax = class_rqmax;
 977
 978         Instance->Log(DEBUG,"Push back to local users.");
 979         Instance->local_users.push_back(New);
 980
 981         Instance->Log(DEBUG,"Check softlimit: %d %d %d",Instance->local_users.size(), Instance->Config->SoftLimit, MAXCLIENTS);
 982         if ((Instance->local_users.size() > Instance->Config->SoftLimit) || (Instance->local_users.size() >= MAXCLIENTS))
 983         {
 984                 Instance->Log(DEBUG,"Check softlimit failed");
 985                 Instance->WriteOpers("*** Warning: softlimit value has been reached: %d clients", Instance->Config->SoftLimit);
 986                 userrec::QuitUser(Instance, New,"No more connections allowed");
 987                 return;
 988         }
 989
 990         Instance->Log(DEBUG,"Softlimit passed.");
 991
 992         /*
 993          * XXX -
 994          * this is done as a safety check to keep the file descriptors within range of fd_ref_table.
 995          * its a pretty big but for the moment valid assumption:
 996          * file descriptors are handed out starting at 0, and are recycled as theyre freed.
 997          * therefore if there is ever an fd over 65535, 65536 clients must be connected to the
 998          * irc server at once (or the irc server otherwise initiating this many connections, files etc)
 999          * which for the time being is a physical impossibility (even the largest networks dont have more
1000          * than about 10,000 users on ONE server!)
1001          */
1002         if ((unsigned int)socket >= MAX_DESCRIPTORS)
1003         {
1004                 userrec::QuitUser(Instance, New, "Server is full");
1005                 return;
1006         }
1007
1008         Instance->Log(DEBUG,"socket < MAX_DESCRIPTORS passed.");
1009
1010         ELine* e = Instance->XLines->matches_exception(New);
1011         if (!e)
1012         {
1013                 Instance->Log(DEBUG,"Doesnt match eline.");
1014                 ZLine* r = Instance->XLines->matches_zline(ipaddr);
1015                 if (r)
1016                 {
1017                         Instance->Log(DEBUG,"Matches zline.");
1018                         char reason[MAXBUF];
1019                         snprintf(reason,MAXBUF,"Z-Lined: %s",r->reason);
1020                         userrec::QuitUser(Instance, New, reason);
1021                         return;
1022                 }
1023                 Instance->Log(DEBUG,"Doesnt match zline.");
1024         }
1025
1026         Instance->Log(DEBUG,"Check before AddFd.");
1027
1028         if (socket > -1)
1029         {
1030                 Instance->Log(DEBUG,"Adding fd.");
1031                 if (!Instance->SE->AddFd(New))
1032                 {
1033                         Instance->Log(DEBUG,"Oops, fd already exists");
1034                         userrec::QuitUser(Instance, New, "Internal error handling connection");
1035                         return;
1036                 }
1037         }
1038
1039         New->WriteServ("NOTICE Auth :*** Looking up your hostname...");
1040 }
1041
1042 long userrec::GlobalCloneCount()
1043 {
1044         char u2[128];
1045         long x = 0;
1046         strlcpy(u2, this->GetIPString(), 64);
1047
1048         for (user_hash::const_iterator a = ServerInstance->clientlist.begin(); a != ServerInstance->clientlist.end(); a++)
1049         {
1050                 /* We have to match ip's as strings - we don't know what protocol
1051                  * a remote user may be using
1052                  */
1053                 if (strcasecmp(a->second->GetIPString(), u2) == 0)
1054                         x++;
1055         }
1056
1057         return x;
1058 }
1059
1060 long userrec::LocalCloneCount()
1061 {
1062         long x = 0;
1063         for (std::vector<userrec*>::const_iterator a = ServerInstance->local_users.begin(); a != ServerInstance->local_users.end(); a++)
1064         {
1065                 userrec* comp = *a;
1066 #ifdef IPV6
1067                 /* I dont think theres any faster way of matching two ipv6 addresses than memcmp */
1068                 in6_addr* s1 = &(((sockaddr_in6*)comp->ip)->sin6_addr);
1069                 in6_addr* s2 = &(((sockaddr_in6*)this->ip)->sin6_addr);
1070                 if (!memcmp(s1->s6_addr, s2->s6_addr, sizeof(in6_addr)))
1071                         x++;
1072 #else
1073                 in_addr* s1 = &((sockaddr_in*)comp->ip)->sin_addr;
1074                 in_addr* s2 = &((sockaddr_in*)this->ip)->sin_addr;
1075                 if (s1->s_addr == s2->s_addr)
1076                         x++;
1077 #endif
1078         }
1079         return x;
1080 }
1081
1082 void userrec::FullConnect(CullList* Goners)
1083 {
1084         ServerInstance->stats->statsConnects++;
1085         this->idle_lastmsg = ServerInstance->Time();
1086
1087         ConnectClass a = this->GetClass();
1088
1089         if (a.type == CC_DENY)
1090         {
1091                 Goners->AddItem(this,"Unauthorised connection");
1092                 return;
1093         }
1094
1095         if ((*(a.pass.c_str())) && (!this->haspassed))
1096         {
1097                 Goners->AddItem(this,"Invalid password");
1098                 return;
1099         }
1100
1101         if (this->LocalCloneCount() > a.maxlocal)
1102         {
1103                 Goners->AddItem(this, "No more connections allowed from your host via this connect class (local)");
1104                 ServerInstance->WriteOpers("*** WARNING: maximum LOCAL connections (%ld) exceeded for IP %s", a.maxlocal, this->GetIPString());
1105                 return;
1106         }
1107         else if (this->GlobalCloneCount() > a.maxglobal)
1108         {
1109                 Goners->AddItem(this, "No more connections allowed from your host via this connect class (global)");
1110                 ServerInstance->WriteOpers("*** WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s",a.maxglobal, this->GetIPString());
1111                 return;
1112         }
1113
1114         ELine* e = ServerInstance->XLines->matches_exception(this);
1115
1116         if (!e)
1117         {
1118                 GLine* r = ServerInstance->XLines->matches_gline(this);
1119
1120                 if (r)
1121                 {
1122                         char reason[MAXBUF];
1123                         snprintf(reason,MAXBUF,"G-Lined: %s",r->reason);
1124                         Goners->AddItem(this, reason);
1125                         return;
1126                 }
1127
1128                 KLine* n = ServerInstance->XLines->matches_kline(this);
1129
1130                 if (n)
1131                 {
1132                         char reason[MAXBUF];
1133                         snprintf(reason,MAXBUF,"K-Lined: %s",n->reason);
1134                         Goners->AddItem(this, reason);
1135                         return;
1136                 }
1137         }
1138
1139
1140         this->WriteServ("NOTICE Auth :Welcome to \002%s\002!",ServerInstance->Config->Network);
1141         this->WriteServ("001 %s :Welcome to the %s IRC Network %s!%s@%s",this->nick, ServerInstance->Config->Network, this->nick, this->ident, this->host);
1142         this->WriteServ("002 %s :Your host is %s, running version %s",this->nick,ServerInstance->Config->ServerName,VERSION);
1143         this->WriteServ("003 %s :This server was created %s %s", this->nick, __TIME__, __DATE__);
1144         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());
1145
1146         // anfl @ #ratbox, efnet reminded me that according to the RFC this cant contain more than 13 tokens per line...
1147         // so i'd better split it :)
1148         std::stringstream out(ServerInstance->Config->data005);
1149         std::string token = "";
1150         std::string line5 = "";
1151         int token_counter = 0;
1152
1153         while (!out.eof())
1154         {
1155                 out >> token;
1156                 line5 = line5 + token + " ";
1157                 token_counter++;
1158
1159                 if ((token_counter >= 13) || (out.eof() == true))
1160                 {
1161                         this->WriteServ("005 %s %s:are supported by this server", this->nick, line5.c_str());
1162                         line5 = "";
1163                         token_counter = 0;
1164                 }
1165         }
1166
1167         this->ShowMOTD();
1168
1169         /*
1170          * fix 3 by brain, move registered = 7 below these so that spurious modes and host
1171          * changes dont go out onto the network and produce 'fake direction'.
1172          */
1173         FOREACH_MOD(I_OnUserConnect,OnUserConnect(this));
1174
1175         this->registered = REG_ALL;
1176
1177         FOREACH_MOD(I_OnPostConnect,OnPostConnect(this));
1178
1179         ServerInstance->SNO->WriteToSnoMask('c',"Client connecting on port %d: %s!%s@%s [%s]", this->GetPort(), this->nick, this->ident, this->host, this->GetIPString());
1180 }
1181
1182 /** userrec::UpdateNick()
1183  * re-allocates a nick in the user_hash after they change nicknames,
1184  * returns a pointer to the new user as it may have moved
1185  */
1186 userrec* userrec::UpdateNickHash(const char* New)
1187 {
1188         try
1189         {
1190                 //user_hash::iterator newnick;
1191                 user_hash::iterator oldnick = ServerInstance->clientlist.find(this->nick);
1192
1193                 if (!strcasecmp(this->nick,New))
1194                         return oldnick->second;
1195
1196                 if (oldnick == ServerInstance->clientlist.end())
1197                         return NULL; /* doesnt exist */
1198
1199                 userrec* olduser = oldnick->second;
1200                 ServerInstance->clientlist[New] = olduser;
1201                 ServerInstance->clientlist.erase(oldnick);
1202                 return ServerInstance->clientlist[New];
1203         }
1204
1205         catch (...)
1206         {
1207                 ServerInstance->Log(DEBUG,"Exception in userrec::UpdateNickHash()");
1208                 return NULL;
1209         }
1210 }
1211
1212 bool userrec::ForceNickChange(const char* newnick)
1213 {
1214         try
1215         {
1216                 int MOD_RESULT = 0;
1217
1218                 FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(this, newnick));
1219
1220                 if (MOD_RESULT)
1221                 {
1222                         ServerInstance->stats->statsCollisions++;
1223                         return false;
1224                 }
1225
1226                 if (ServerInstance->XLines->matches_qline(newnick))
1227                 {
1228                         ServerInstance->stats->statsCollisions++;
1229                         return false;
1230                 }
1231
1232                 if (this->registered == REG_ALL)
1233                 {
1234                         const char* pars[1];
1235                         pars[0] = newnick;
1236                         std::string cmd = "NICK";
1237                         return (ServerInstance->Parser->CallHandler(cmd, pars, 1, this) == CMD_SUCCESS);
1238                 }
1239                 return false;
1240         }
1241
1242         catch (...)
1243         {
1244                 ServerInstance->Log(DEBUG,"Exception in userrec::ForceNickChange()");
1245                 return false;
1246         }
1247 }
1248
1249 void userrec::SetSockAddr(int protocol_family, const char* ip, int port)
1250 {
1251         switch (protocol_family)
1252         {
1253 #ifdef SUPPORT_IP6LINKS
1254                 case AF_INET6:
1255                 {
1256                         ServerInstance->Log(DEBUG,"Set inet6 protocol address");
1257                         sockaddr_in6* sin = new sockaddr_in6;
1258                         sin->sin6_family = AF_INET6;
1259                         sin->sin6_port = port;
1260                         inet_pton(AF_INET6, ip, &sin->sin6_addr);
1261                         this->ip = (sockaddr*)sin;
1262                 }
1263                 break;
1264 #endif
1265                 case AF_INET:
1266                 {
1267                         ServerInstance->Log(DEBUG,"Set inet4 protocol address");
1268                         sockaddr_in* sin = new sockaddr_in;
1269                         sin->sin_family = AF_INET;
1270                         sin->sin_port = port;
1271                         inet_pton(AF_INET, ip, &sin->sin_addr);
1272                         this->ip = (sockaddr*)sin;
1273                 }
1274                 break;
1275                 default:
1276                         ServerInstance->Log(DEBUG,"Ut oh, I dont know protocol %d to be set on '%s'!", protocol_family, this->nick);
1277                 break;
1278         }
1279 }
1280
1281 int userrec::GetPort()
1282 {
1283         if (this->ip == NULL)
1284                 return 0;
1285
1286         switch (this->GetProtocolFamily())
1287         {
1288 #ifdef SUPPORT_IP6LINKS
1289                 case AF_INET6:
1290                 {
1291                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1292                         return sin->sin6_port;
1293                 }
1294                 break;
1295 #endif
1296                 case AF_INET:
1297                 {
1298                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1299                         return sin->sin_port;
1300                 }
1301                 break;
1302                 default:
1303                         ServerInstance->Log(DEBUG,"Ut oh, '%s' has an unknown protocol family!",this->nick);
1304                 break;
1305         }
1306         return 0;
1307 }
1308
1309 int userrec::GetProtocolFamily()
1310 {
1311         if (this->ip == NULL)
1312                 return 0;
1313
1314         sockaddr_in* sin = (sockaddr_in*)this->ip;
1315         return sin->sin_family;
1316 }
1317
1318 const char* userrec::GetIPString()
1319 {
1320         static char buf[1024];
1321
1322         if (this->ip == NULL)
1323                 return "";
1324
1325         switch (this->GetProtocolFamily())
1326         {
1327 #ifdef SUPPORT_IP6LINKS
1328                 case AF_INET6:
1329                 {
1330                         static char temp[1024];
1331
1332                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1333                         inet_ntop(sin->sin6_family, &sin->sin6_addr, buf, sizeof(buf));
1334                         /* IP addresses starting with a : on irc are a Bad Thing (tm) */
1335                         if (*buf == ':')
1336                         {
1337                                 strlcpy(&temp[1], buf, sizeof(temp));
1338                                 *temp = '0';
1339                                 return temp;
1340                         }
1341                         return buf;
1342                 }
1343                 break;
1344 #endif
1345                 case AF_INET:
1346                 {
1347                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1348                         inet_ntop(sin->sin_family, &sin->sin_addr, buf, sizeof(buf));
1349                         return buf;
1350                 }
1351                 break;
1352                 default:
1353                         ServerInstance->Log(DEBUG,"Ut oh, '%s' has an unknown protocol family!",this->nick);
1354                 break;
1355         }
1356         return "";
1357 }
1358
1359 const char* userrec::GetIPString(char* buf)
1360 {
1361         if (this->ip == NULL)
1362         {
1363                 *buf = 0;
1364                 return buf;
1365         }
1366
1367         switch (this->GetProtocolFamily())
1368         {
1369 #ifdef SUPPORT_IP6LINKS
1370                 case AF_INET6:
1371                 {
1372                         static char temp[1024];
1373
1374                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1375                         inet_ntop(sin->sin6_family, &sin->sin6_addr, buf, sizeof(buf));
1376                         /* IP addresses starting with a : on irc are a Bad Thing (tm) */
1377                         if (*buf == ':')
1378                         {
1379                                 strlcpy(&temp[1], buf, sizeof(temp));
1380                                 *temp = '0';
1381                                 strlcpy(buf, temp, sizeof(temp));
1382                         }
1383                         return buf;
1384                 }
1385                 break;
1386 #endif
1387                 case AF_INET:
1388                 {
1389                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1390                         inet_ntop(sin->sin_family, &sin->sin_addr, buf, sizeof(buf));
1391                         return buf;
1392                 }
1393                 break;
1394
1395                 default:
1396                         ServerInstance->Log(DEBUG,"Ut oh, '%s' has an unknown protocol family!",this->nick);
1397                 break;
1398         }
1399         return "";
1400 }
1401
1402 /** NOTE: We cannot pass a const reference to this method.
1403  * The string is changed by the workings of the method,
1404  * so that if we pass const ref, we end up copying it to
1405  * something we can change anyway. Makes sense to just let
1406  * the compiler do that copy for us.
1407  */
1408 void userrec::Write(std::string text)
1409 {
1410         if ((this->fd < 0) || (this->fd > MAX_DESCRIPTORS))
1411                 return;
1412
1413         try
1414         {
1415                 text.append("\r\n");
1416         }
1417         catch (...)
1418         {
1419                 ServerInstance->Log(DEBUG,"Exception in userrec::Write() std::string::append");
1420                 return;
1421         }
1422
1423         if (ServerInstance->Config->GetIOHook(this->GetPort()))
1424         {
1425                 try
1426                 {
1427                         ServerInstance->Config->GetIOHook(this->GetPort())->OnRawSocketWrite(this->fd, text.data(), text.length());
1428                 }
1429                 catch (ModuleException& modexcept)
1430                 {
1431                         ServerInstance->Log(DEBUG,"Module exception caught: %s",modexcept.GetReason());
1432                 }
1433         }
1434         else
1435         {
1436                 this->AddWriteBuf(text);
1437         }
1438         ServerInstance->stats->statsSent += text.length();
1439         this->ServerInstance->SE->WantWrite(this);
1440 }
1441
1442 /** Write()
1443  */
1444 void userrec::Write(const char *text, ...)
1445 {
1446         va_list argsPtr;
1447         char textbuffer[MAXBUF];
1448
1449         va_start(argsPtr, text);
1450         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1451         va_end(argsPtr);
1452
1453         this->Write(std::string(textbuffer));
1454 }
1455
1456 void userrec::WriteServ(const std::string& text)
1457 {
1458         char textbuffer[MAXBUF];
1459
1460         snprintf(textbuffer,MAXBUF,":%s %s",ServerInstance->Config->ServerName,text.c_str());
1461         this->Write(std::string(textbuffer));
1462 }
1463
1464 /** WriteServ()
1465  *  Same as Write(), except `text' is prefixed with `:server.name '.
1466  */
1467 void userrec::WriteServ(const char* text, ...)
1468 {
1469         va_list argsPtr;
1470         char textbuffer[MAXBUF];
1471
1472         va_start(argsPtr, text);
1473         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1474         va_end(argsPtr);
1475
1476         this->WriteServ(std::string(textbuffer));
1477 }
1478
1479
1480 void userrec::WriteFrom(userrec *user, const std::string &text)
1481 {
1482         char tb[MAXBUF];
1483
1484         snprintf(tb,MAXBUF,":%s %s",user->GetFullHost(),text.c_str());
1485
1486         this->Write(std::string(tb));
1487 }
1488
1489
1490 /* write text from an originating user to originating user */
1491
1492 void userrec::WriteFrom(userrec *user, const char* text, ...)
1493 {
1494         va_list argsPtr;
1495         char textbuffer[MAXBUF];
1496
1497         va_start(argsPtr, text);
1498         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1499         va_end(argsPtr);
1500
1501         this->WriteFrom(user, std::string(textbuffer));
1502 }
1503
1504
1505 /* write text to an destination user from a source user (e.g. user privmsg) */
1506
1507 void userrec::WriteTo(userrec *dest, const char *data, ...)
1508 {
1509         char textbuffer[MAXBUF];
1510         va_list argsPtr;
1511
1512         va_start(argsPtr, data);
1513         vsnprintf(textbuffer, MAXBUF, data, argsPtr);
1514         va_end(argsPtr);
1515
1516         this->WriteTo(dest, std::string(textbuffer));
1517 }
1518
1519 void userrec::WriteTo(userrec *dest, const std::string &data)
1520 {
1521         dest->WriteFrom(this, data);
1522 }
1523
1524
1525 void userrec::WriteCommon(const char* text, ...)
1526 {
1527         char textbuffer[MAXBUF];
1528         va_list argsPtr;
1529
1530         if (this->registered != REG_ALL)
1531                 return;
1532
1533         va_start(argsPtr, text);
1534         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1535         va_end(argsPtr);
1536
1537         this->WriteCommon(std::string(textbuffer));
1538 }
1539
1540 void userrec::WriteCommon(const std::string &text)
1541 {
1542         try
1543         {
1544                 bool sent_to_at_least_one = false;
1545
1546                 if (this->registered != REG_ALL)
1547                         return;
1548
1549                 uniq_id++;
1550
1551                 for (std::vector<ucrec*>::const_iterator v = this->chans.begin(); v != this->chans.end(); v++)
1552                 {
1553                         ucrec *n = *v;
1554                         if (n->channel)
1555                         {
1556                                 CUList *ulist= n->channel->GetUsers();
1557
1558                                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1559                                 {
1560                                         if ((IS_LOCAL(i->second)) && (already_sent[i->second->fd] != uniq_id))
1561                                         {
1562                                                 already_sent[i->second->fd] = uniq_id;
1563                                                 i->second->WriteFrom(this, std::string(text));
1564                                                 sent_to_at_least_one = true;
1565                                         }
1566                                 }
1567                         }
1568                 }
1569
1570                 /*
1571                  * if the user was not in any channels, no users will receive the text. Make sure the user
1572                  * receives their OWN message for WriteCommon
1573                  */
1574                 if (!sent_to_at_least_one)
1575                 {
1576                         this->WriteFrom(this,std::string(text));
1577                 }
1578         }
1579
1580         catch (...)
1581         {
1582                 ServerInstance->Log(DEBUG,"Exception in userrec::WriteCommon()");
1583         }
1584 }
1585
1586
1587 /* write a formatted string to all users who share at least one common
1588  * channel, NOT including the source user e.g. for use in QUIT
1589  */
1590
1591 void userrec::WriteCommonExcept(const char* text, ...)
1592 {
1593         char textbuffer[MAXBUF];
1594         va_list argsPtr;
1595
1596         va_start(argsPtr, text);
1597         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1598         va_end(argsPtr);
1599
1600         this->WriteCommonExcept(std::string(textbuffer));
1601 }
1602
1603 void userrec::WriteCommonExcept(const std::string &text)
1604 {
1605         bool quit_munge = false;
1606         char oper_quit[MAXBUF];
1607         char textbuffer[MAXBUF];
1608
1609         strlcpy(textbuffer, text.c_str(), MAXBUF);
1610
1611         if (this->registered != REG_ALL)
1612                 return;
1613
1614         uniq_id++;
1615
1616         /* TODO: We need some form of WriteCommonExcept that will send two lines, one line to
1617          * opers and the other line to non-opers, then all this hidebans and hidesplits gunk
1618          * can go byebye.
1619          */
1620         if (ServerInstance->Config->HideSplits)
1621         {
1622                 char* check = textbuffer + 6;
1623
1624                 if (!strncasecmp(textbuffer, "QUIT :",6))
1625                 {
1626                         std::stringstream split(check);
1627                         std::string server_one;
1628                         std::string server_two;
1629
1630                         split >> server_one;
1631                         split >> server_two;
1632
1633                         if ((ServerInstance->FindServerName(server_one)) && (ServerInstance->FindServerName(server_two)))
1634                         {
1635                                 strlcpy(oper_quit,textbuffer,MAXQUIT);
1636                                 strlcpy(check,"*.net *.split",MAXQUIT);
1637                                 quit_munge = true;
1638                         }
1639                 }
1640         }
1641
1642         if ((ServerInstance->Config->HideBans) && (!quit_munge))
1643         {
1644                 if ((!strncasecmp(textbuffer, "QUIT :G-Lined:",14)) || (!strncasecmp(textbuffer, "QUIT :K-Lined:",14))
1645                 || (!strncasecmp(textbuffer, "QUIT :Q-Lined:",14)) || (!strncasecmp(textbuffer, "QUIT :Z-Lined:",14)))
1646                 {
1647                         char* check = textbuffer + 13;
1648                         strlcpy(oper_quit,textbuffer,MAXQUIT);
1649                         *check = 0;  // We don't need to strlcpy, we just chop it from the :
1650                         quit_munge = true;
1651                 }
1652         }
1653
1654         for (std::vector<ucrec*>::const_iterator v = this->chans.begin(); v != this->chans.end(); v++)
1655         {
1656                 ucrec* n = *v;
1657                 if (n->channel)
1658                 {
1659                         CUList *ulist= n->channel->GetUsers();
1660
1661                         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1662                         {
1663                                 if (this != i->second)
1664                                 {
1665                                         if ((IS_LOCAL(i->second)) && (already_sent[i->second->fd] != uniq_id))
1666                                         {
1667                                                 already_sent[i->second->fd] = uniq_id;
1668                                                 if (quit_munge)
1669                                                         i->second->WriteFrom(this, *i->second->oper ? std::string(oper_quit) : std::string(textbuffer));
1670                                                 else
1671                                                         i->second->WriteFrom(this, std::string(textbuffer));
1672                                         }
1673                                 }
1674                         }
1675                 }
1676         }
1677
1678 }
1679
1680 void userrec::WriteWallOps(const std::string &text)
1681 {
1682         /* Does nothing if theyre not opered */
1683         if ((!*this->oper) && (IS_LOCAL(this)))
1684                 return;
1685
1686         std::string wallop = "WALLOPS :";
1687
1688         try
1689         {
1690                 wallop.append(text);
1691         }
1692         catch (...)
1693         {
1694                 ServerInstance->Log(DEBUG,"Exception in userrec::Write() std::string::append");
1695                 return;
1696         }
1697
1698         for (std::vector<userrec*>::const_iterator i = ServerInstance->local_users.begin(); i != ServerInstance->local_users.end(); i++)
1699         {
1700                 userrec* t = *i;
1701                 if ((IS_LOCAL(t)) && (t->modes[UM_WALLOPS]))
1702                         this->WriteTo(t,wallop);
1703         }
1704 }
1705
1706 void userrec::WriteWallOps(const char* text, ...)
1707 {
1708         char textbuffer[MAXBUF];
1709         va_list argsPtr;
1710
1711         va_start(argsPtr, text);
1712         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1713         va_end(argsPtr);
1714
1715         this->WriteWallOps(std::string(textbuffer));
1716 }
1717
1718 /* return 0 or 1 depending if users u and u2 share one or more common channels
1719  * (used by QUIT, NICK etc which arent channel specific notices)
1720  *
1721  * The old algorithm in 1.0 for this was relatively inefficient, iterating over
1722  * the first users channels then the second users channels within the outer loop,
1723  * therefore it was a maximum of x*y iterations (upon returning 0 and checking
1724  * all possible iterations). However this new function instead checks against the
1725  * channel's userlist in the inner loop which is a std::map<userrec*,userrec*>
1726  * and saves us time as we already know what pointer value we are after.
1727  * Don't quote me on the maths as i am not a mathematician or computer scientist,
1728  * but i believe this algorithm is now x+(log y) maximum iterations instead.
1729  */
1730 bool userrec::SharesChannelWith(userrec *other)
1731 {
1732         if ((!other) || (this->registered != REG_ALL) || (other->registered != REG_ALL))
1733                 return false;
1734
1735         /* Outer loop */
1736         for (std::vector<ucrec*>::const_iterator i = this->chans.begin(); i != this->chans.end(); i++)
1737         {
1738                 /* Fetch the channel from the user */
1739                 ucrec* user_channel = *i;
1740
1741                 if (user_channel->channel)
1742                 {
1743                         /* Eliminate the inner loop (which used to be ~equal in size to the outer loop)
1744                          * by replacing it with a map::find which *should* be more efficient
1745                          */
1746                         if (user_channel->channel->HasUser(other))
1747                                 return true;
1748                 }
1749         }
1750         return false;
1751 }
1752
1753 int userrec::CountChannels()
1754 {
1755         return ChannelCount;
1756 }
1757
1758 void userrec::ModChannelCount(int n)
1759 {
1760         ChannelCount += n;
1761 }
1762
1763 bool userrec::ChangeName(const char* gecos)
1764 {
1765         if (!strcmp(gecos, this->fullname))
1766                 return true;
1767
1768         if (IS_LOCAL(this))
1769         {
1770                 int MOD_RESULT = 0;
1771                 FOREACH_RESULT(I_OnChangeLocalUserGECOS,OnChangeLocalUserGECOS(this,gecos));
1772                 if (MOD_RESULT)
1773                         return false;
1774                 FOREACH_MOD(I_OnChangeName,OnChangeName(this,gecos));
1775         }
1776         strlcpy(this->fullname,gecos,MAXGECOS+1);
1777         return true;
1778 }
1779
1780 bool userrec::ChangeDisplayedHost(const char* host)
1781 {
1782         if (!strcmp(host, this->dhost))
1783                 return true;
1784
1785         if (IS_LOCAL(this))
1786         {
1787                 int MOD_RESULT = 0;
1788                 FOREACH_RESULT(I_OnChangeLocalUserHost,OnChangeLocalUserHost(this,host));
1789                 if (MOD_RESULT)
1790                         return false;
1791                 FOREACH_MOD(I_OnChangeHost,OnChangeHost(this,host));
1792         }
1793         if (this->ServerInstance->Config->CycleHosts)
1794                 this->WriteCommonExcept("%s","QUIT :Changing hosts");
1795
1796         strlcpy(this->dhost,host,63);
1797
1798         if (this->ServerInstance->Config->CycleHosts)
1799         {
1800                 for (std::vector<ucrec*>::const_iterator i = this->chans.begin(); i != this->chans.end(); i++)
1801                 {
1802                         if ((*i)->channel)
1803                         {
1804                                 (*i)->channel->WriteAllExceptSender(this, false, 0, "JOIN %s", (*i)->channel->name);
1805                                 std::string n = this->ServerInstance->Modes->ModeString(this, (*i)->channel);
1806                                 if (n.length() > 0)
1807                                         (*i)->channel->WriteAllExceptSender(this, true, 0, "MODE %s +%s", (*i)->channel->name, n.c_str());
1808                         }
1809                 }
1810         }
1811
1812         if (IS_LOCAL(this))
1813                 this->WriteServ("396 %s %s :is now your hidden host",this->nick,this->dhost);
1814
1815         return true;
1816 }
1817
1818 bool userrec::ChangeIdent(const char* newident)
1819 {
1820         if (!strcmp(newident, this->ident))
1821                 return true;
1822
1823         if (this->ServerInstance->Config->CycleHosts)
1824                 this->WriteCommonExcept("%s","QUIT :Changing ident");
1825
1826         strlcpy(this->ident, newident, IDENTMAX+2);
1827
1828         if (this->ServerInstance->Config->CycleHosts)
1829         {
1830                 for (std::vector<ucrec*>::const_iterator i = this->chans.begin(); i != this->chans.end(); i++)
1831                 {
1832                         if ((*i)->channel)
1833                         {
1834                                 (*i)->channel->WriteAllExceptSender(this, false, 0, "JOIN %s", (*i)->channel->name);
1835                                 std::string n = this->ServerInstance->Modes->ModeString(this, (*i)->channel);
1836                                 if (n.length() > 0)
1837                                         (*i)->channel->WriteAllExceptSender(this, true, 0, "MODE %s +%s", (*i)->channel->name, n.c_str());
1838                         }
1839                 }
1840         }
1841
1842         return true;
1843 }
1844
1845 void userrec::NoticeAll(char* text, ...)
1846 {
1847         char textbuffer[MAXBUF];
1848         char formatbuffer[MAXBUF];
1849         va_list argsPtr;
1850
1851         va_start(argsPtr, text);
1852         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1853         va_end(argsPtr);
1854
1855         snprintf(formatbuffer,MAXBUF,"NOTICE $* :%s",textbuffer);
1856
1857         for (std::vector<userrec*>::const_iterator i = ServerInstance->local_users.begin(); i != ServerInstance->local_users.end(); i++)
1858         {
1859                 userrec* t = *i;
1860                 t->WriteFrom(this, std::string(formatbuffer));
1861         }
1862 }
1863
1864
1865 std::string userrec::ChannelList(userrec* source)
1866 {
1867         try
1868         {
1869                 std::string list;
1870                 for (std::vector<ucrec*>::const_iterator i = this->chans.begin(); i != this->chans.end(); i++)
1871                 {
1872                         ucrec* rec = *i;
1873
1874                         if(rec->channel && rec->channel->name)
1875                         {
1876                                 /* If the target is the same as the sender, let them see all their channels.
1877                                  * If the channel is NOT private/secret OR the user shares a common channel
1878                                  * If the user is an oper, and the <options:operspywhois> option is set.
1879                                  */
1880                                 if ((source == this) || (*source->oper && ServerInstance->Config->OperSpyWhois) || (((!rec->channel->modes[CM_PRIVATE]) && (!rec->channel->modes[CM_SECRET])) || (rec->channel->HasUser(source))))
1881                                 {
1882                                         list.append(rec->channel->GetPrefixChar(this)).append(rec->channel->name).append(" ");
1883                                 }
1884                         }
1885                 }
1886                 return list;
1887         }
1888         catch (...)
1889         {
1890                 ServerInstance->Log(DEBUG,"Exception in userrec::ChannelList()");
1891                 return "";
1892         }
1893 }
1894
1895 void userrec::SplitChanList(userrec* dest, const std::string &cl)
1896 {
1897         std::string line;
1898         std::ostringstream prefix;
1899         std::string::size_type start, pos, length;
1900
1901         try
1902         {
1903                 prefix << this->nick << " " << dest->nick << " :";
1904                 line = prefix.str();
1905                 int namelen = strlen(ServerInstance->Config->ServerName) + 6;
1906
1907                 for (start = 0; (pos = cl.find(' ', start)) != std::string::npos; start = pos+1)
1908                 {
1909                         length = (pos == std::string::npos) ? cl.length() : pos;
1910
1911                         if (line.length() + namelen + length - start > 510)
1912                         {
1913                                 this->Write(line);
1914                                 line = prefix.str();
1915                         }
1916
1917                         if(pos == std::string::npos)
1918                         {
1919                                 line.append(cl.substr(start, length - start));
1920                                 break;
1921                         }
1922                         else
1923                         {
1924                                 line.append(cl.substr(start, length - start + 1));
1925                         }
1926                 }
1927
1928                 if (line.length())
1929                 {
1930                         ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1931                 }
1932         }
1933
1934         catch (...)
1935         {
1936                 ServerInstance->Log(DEBUG,"Exception in userrec::SplitChanList()");
1937         }
1938 }
1939
1940
1941 /* looks up a users password for their connection class (<ALLOW>/<DENY> tags)
1942  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1943  * then their ip will be taken as 'priority' anyway, so for example,
1944  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1945  */
1946 ConnectClass& userrec::GetClass()
1947 {
1948         for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1949         {
1950                 if ((match(this->GetIPString(),i->host.c_str(),true)) || (match(this->host,i->host.c_str())))
1951                         return *i;
1952         }
1953
1954         return *(ServerInstance->Config->Classes.begin());
1955 }
1956
1957 void userrec::PurgeEmptyChannels()
1958 {
1959         std::vector<chanrec*> to_delete;
1960
1961         // firstly decrement the count on each channel
1962         for (std::vector<ucrec*>::iterator f = this->chans.begin(); f != this->chans.end(); f++)
1963         {
1964                 ucrec* uc = *f;
1965                 if (uc->channel)
1966                 {
1967                         uc->channel->RemoveAllPrefixes(this);
1968                         if (uc->channel->DelUser(this) == 0)
1969                         {
1970                                 /* No users left in here, mark it for deletion */
1971                                 try
1972                                 {
1973                                         to_delete.push_back(uc->channel);
1974                                 }
1975                                 catch (...)
1976                                 {
1977                                         ServerInstance->Log(DEBUG,"Exception in userrec::PurgeEmptyChannels to_delete.push_back()");
1978                                 }
1979                                 uc->channel = NULL;
1980                         }
1981                 }
1982         }
1983
1984         for (std::vector<chanrec*>::iterator n = to_delete.begin(); n != to_delete.end(); n++)
1985         {
1986                 chanrec* thischan = *n;
1987                 chan_hash::iterator i2 = ServerInstance->chanlist.find(thischan->name);
1988                 if (i2 != ServerInstance->chanlist.end())
1989                 {
1990                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(i2->second));
1991                         DELETE(i2->second);
1992                         ServerInstance->chanlist.erase(i2);
1993                 }
1994         }
1995
1996         this->UnOper();
1997 }
1998
1999 void userrec::ShowMOTD()
2000 {
2001         if (!ServerInstance->Config->MOTD.size())
2002         {
2003                 this->WriteServ("422 %s :Message of the day file is missing.",this->nick);
2004                 return;
2005         }
2006         this->WriteServ("375 %s :%s message of the day", this->nick, ServerInstance->Config->ServerName);
2007
2008         for (unsigned int i = 0; i < ServerInstance->Config->MOTD.size(); i++)
2009                 this->WriteServ("372 %s :- %s",this->nick,ServerInstance->Config->MOTD[i].c_str());
2010
2011         this->WriteServ("376 %s :End of message of the day.", this->nick);
2012 }
2013
2014 void userrec::ShowRULES()
2015 {
2016         if (!ServerInstance->Config->RULES.size())
2017         {
2018                 this->WriteServ("NOTICE %s :Rules file is missing.",this->nick);
2019                 return;
2020         }
2021         this->WriteServ("NOTICE %s :%s rules",this->nick,ServerInstance->Config->ServerName);
2022
2023         for (unsigned int i = 0; i < ServerInstance->Config->RULES.size(); i++)
2024                 this->WriteServ("NOTICE %s :%s",this->nick,ServerInstance->Config->RULES[i].c_str());
2025
2026         this->WriteServ("NOTICE %s :End of %s rules.",this->nick,ServerInstance->Config->ServerName);
2027 }
2028
2029 void userrec::HandleEvent(EventType et, int errornum)
2030 {
2031         /* WARNING: May delete this user! */
2032         try
2033         {
2034                 switch (et)
2035                 {
2036                         case EVENT_READ:
2037                                 ServerInstance->ProcessUser(this);
2038                         break;
2039                         case EVENT_WRITE:
2040                                 this->FlushWriteBuf();
2041                         break;
2042                         case EVENT_ERROR:
2043                                 this->SetWriteError(strerror(errornum));
2044                         break;
2045                 }
2046         }
2047         catch (...)
2048         {
2049                 ServerInstance->Log(DEBUG,"Exception in userrec::HandleEvent intercepted");
2050         }
2051 }
2052