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 irc::whowas::whowas_users whowas;
  28 static unsigned long already_sent[MAX_DESCRIPTORS] = {0};
  29
  30 typedef std::map<irc::string,char*> opertype_t;
  31 typedef opertype_t operclass_t;
  32
  33 opertype_t opertypes;
  34 operclass_t operclass;
  35
  36 /* XXX: Used for speeding up WriteCommon operations */
  37 unsigned long uniq_id = 0;
  38
  39 bool InitTypes(ServerConfig* conf, const char* tag)
  40 {
  41         for (opertype_t::iterator n = opertypes.begin(); n != opertypes.end(); n++)
  42         {
  43                 if (n->second)
  44                         delete[] n->second;
  45         }
  46
  47         opertypes.clear();
  48         return true;
  49 }
  50
  51 bool InitClasses(ServerConfig* conf, const char* tag)
  52 {
  53         for (operclass_t::iterator n = operclass.begin(); n != operclass.end(); n++)
  54         {
  55                 if (n->second)
  56                         delete[] n->second;
  57         }
  58
  59         operclass.clear();
  60         return true;
  61 }
  62
  63 bool DoType(ServerConfig* conf, const char* tag, char** entries, void** values, int* types)
  64 {
  65         char* TypeName = (char*)values[0];
  66         char* Classes = (char*)values[1];
  67
  68         opertypes[TypeName] = strdup(Classes);
  69         conf->GetInstance()->Log(DEBUG,"Read oper TYPE '%s' with classes '%s'",TypeName,Classes);
  70         return true;
  71 }
  72
  73 bool DoClass(ServerConfig* conf, const char* tag, char** entries, void** values, int* types)
  74 {
  75         char* ClassName = (char*)values[0];
  76         char* CommandList = (char*)values[1];
  77
  78         operclass[ClassName] = strdup(CommandList);
  79         conf->GetInstance()->Log(DEBUG,"Read oper CLASS '%s' with commands '%s'",ClassName,CommandList);
  80         return true;
  81 }
  82
  83 bool DoneClassesAndTypes(ServerConfig* conf, const char* tag)
  84 {
  85         return true;
  86 }
  87
  88 std::string userrec::ProcessNoticeMasks(const char *sm)
  89 {
  90         bool adding = true, oldadding = false;
  91         const char *c = sm;
  92         std::string output;
  93
  94         ServerInstance->Log(DEBUG,"Process notice masks");
  95
  96         while (c && *c)
  97         {
  98                 ServerInstance->Log(DEBUG,"Process notice mask %c",*c);
  99
 100                 switch (*c)
 101                 {
 102                         case '+':
 103                                 adding = true;
 104                         break;
 105                         case '-':
 106                                 adding = false;
 107                         break;
 108                         default:
 109                                 if ((*c >= 'A') && (*c <= 'z') && (ServerInstance->SNO->IsEnabled(*c)))
 110                                 {
 111                                         if ((!IsNoticeMaskSet(*c) && adding) || (IsNoticeMaskSet(*c) && !adding))
 112                                         {
 113                                                 if ((oldadding != adding) || (!output.length()))
 114                                                         output += (adding ? '+' : '-');
 115
 116                                                 this->SetNoticeMask(*c, adding);
 117
 118                                                 output += *c;
 119                                         }
 120                                 }
 121                                 oldadding = adding;
 122                         break;
 123                 }
 124
 125                 *c++;
 126         }
 127
 128         return output;
 129 }
 130
 131 void userrec::StartDNSLookup()
 132 {
 133         ServerInstance->Log(DEBUG,"Commencing reverse lookup");
 134         try
 135         {
 136                 ServerInstance->Log(DEBUG,"Passing instance: %08x",this->ServerInstance);
 137                 res_reverse = new UserResolver(this->ServerInstance, this, this->GetIPString(), false);
 138                 this->ServerInstance->AddResolver(res_reverse);
 139         }
 140         catch (ModuleException& e)
 141         {
 142                 ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
 143         }
 144 }
 145
 146 UserResolver::UserResolver(InspIRCd* Instance, userrec* user, std::string to_resolve, bool forward) :
 147         Resolver(Instance, to_resolve, forward ? DNS_QUERY_FORWARD : DNS_QUERY_REVERSE), bound_user(user)
 148 {
 149         this->fwd = forward;
 150         this->bound_fd = user->GetFd();
 151 }
 152
 153 void UserResolver::OnLookupComplete(const std::string &result)
 154 {
 155         if ((!this->fwd) && (ServerInstance->SE->GetRef(this->bound_fd) == this->bound_user))
 156         {
 157                 ServerInstance->Log(DEBUG,"Commencing forward lookup");
 158                 this->bound_user->stored_host = result;
 159                 try
 160                 {
 161                         /* Check we didnt time out */
 162                         if (this->bound_user->registered != REG_ALL)
 163                         {
 164                                 bound_user->res_forward = new UserResolver(this->ServerInstance, this->bound_user, result, true);
 165                                 this->ServerInstance->AddResolver(bound_user->res_forward);
 166                         }
 167                 }
 168                 catch (ModuleException& e)
 169                 {
 170                         ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
 171                 }
 172         }
 173         else if ((this->fwd) && (ServerInstance->SE->GetRef(this->bound_fd) == this->bound_user))
 174         {
 175                 /* Both lookups completed */
 176                 if (this->bound_user->GetIPString() == result)
 177                 {
 178                         std::string hostname = this->bound_user->stored_host;
 179                         if (hostname.length() < 65)
 180                         {
 181                                 /* Check we didnt time out */
 182                                 if (this->bound_user->registered != REG_ALL)
 183                                 {
 184                                         /* Hostnames starting with : are not a good thing (tm) */
 185                                         if (*(hostname.c_str()) == ':')
 186                                                 hostname = "0" + hostname;
 187
 188                                         this->bound_user->WriteServ("NOTICE Auth :*** Found your hostname (%s)", hostname.c_str());
 189                                         this->bound_user->dns_done = true;
 190                                         strlcpy(this->bound_user->dhost, hostname.c_str(),64);
 191                                         strlcpy(this->bound_user->host, hostname.c_str(),64);
 192                                 }
 193                         }
 194                         else
 195                         {
 196                                 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());
 197                         }
 198                 }
 199                 else
 200                 {
 201                         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());
 202                 }
 203         }
 204 }
 205
 206 void UserResolver::OnError(ResolverError e, const std::string &errormessage)
 207 {
 208         if (ServerInstance->SE->GetRef(this->bound_fd) == this->bound_user)
 209         {
 210                 /* Error message here */
 211                 this->bound_user->WriteServ("NOTICE Auth :*** Could not resolve your hostname, using your IP address (%s) instead.", this->bound_user->GetIPString());
 212                 this->bound_user->dns_done = true;
 213         }
 214 }
 215
 216
 217 bool userrec::IsNoticeMaskSet(unsigned char sm)
 218 {
 219         return (snomasks[sm-65]);
 220 }
 221
 222 void userrec::SetNoticeMask(unsigned char sm, bool value)
 223 {
 224         snomasks[sm-65] = value;
 225 }
 226
 227 const char* userrec::FormatNoticeMasks()
 228 {
 229         static char data[MAXBUF];
 230         int offset = 0;
 231
 232         for (int n = 0; n < 64; n++)
 233         {
 234                 if (snomasks[n])
 235                         data[offset++] = n+65;
 236         }
 237
 238         data[offset] = 0;
 239         return data;
 240 }
 241
 242
 243
 244 bool userrec::IsModeSet(unsigned char m)
 245 {
 246         return (modes[m-65]);
 247 }
 248
 249 void userrec::SetMode(unsigned char m, bool value)
 250 {
 251         modes[m-65] = value;
 252 }
 253
 254 const char* userrec::FormatModes()
 255 {
 256         static char data[MAXBUF];
 257         int offset = 0;
 258         for (int n = 0; n < 64; n++)
 259         {
 260                 if (modes[n])
 261                         data[offset++] = n+65;
 262         }
 263         data[offset] = 0;
 264         return data;
 265 }
 266
 267 userrec::userrec(InspIRCd* Instance) : ServerInstance(Instance)
 268 {
 269         ServerInstance->Log(DEBUG,"userrec::userrec(): Instance: %08x",ServerInstance);
 270         // the PROPER way to do it, AVOID bzero at *ALL* costs
 271         *password = *nick = *ident = *host = *dhost = *fullname = *awaymsg = *oper = 0;
 272         server = (char*)Instance->FindServerNamePtr(Instance->Config->ServerName);
 273         reset_due = ServerInstance->Time();
 274         lines_in = lastping = signon = idle_lastmsg = nping = registered = 0;
 275         ChannelCount = timeout = flood = bytes_in = bytes_out = cmds_in = cmds_out = 0;
 276         haspassed = dns_done = false;
 277         fd = -1;
 278         recvq = "";
 279         sendq = "";
 280         WriteError = "";
 281         res_forward = res_reverse = NULL;
 282         ip = NULL;
 283         chans.clear();
 284         invites.clear();
 285         chans.resize(MAXCHANS);
 286         memset(modes,0,sizeof(modes));
 287         memset(snomasks,0,sizeof(snomasks));
 288
 289         for (unsigned int n = 0; n < MAXCHANS; n++)
 290         {
 291                 ucrec* x = new ucrec();
 292                 chans[n] = x;
 293                 x->channel = NULL;
 294                 x->uc_modes = 0;
 295         }
 296 }
 297
 298 userrec::~userrec()
 299 {
 300         for (std::vector<ucrec*>::iterator n = chans.begin(); n != chans.end(); n++)
 301         {
 302                 ucrec* x = (ucrec*)*n;
 303                 delete x;
 304         }
 305
 306         if (ip)
 307         {
 308                 if (this->GetProtocolFamily() == AF_INET)
 309                 {
 310                         delete (sockaddr_in*)ip;
 311                 }
 312 #ifdef SUPPORT_IP6LINKS
 313                 else
 314                 {
 315                         delete (sockaddr_in6*)ip;
 316                 }
 317 #endif
 318         }
 319 }
 320
 321 /* XXX - minor point, other *Host functions return a char *, this one creates it. Might be nice to be consistant? */
 322 void userrec::MakeHost(char* nhost)
 323 {
 324         /* This is much faster than snprintf */
 325         char* t = nhost;
 326         for(char* n = ident; *n; n++)
 327                 *t++ = *n;
 328         *t++ = '@';
 329         for(char* n = host; *n; n++)
 330                 *t++ = *n;
 331         *t = 0;
 332 }
 333
 334 void userrec::CloseSocket()
 335 {
 336         shutdown(this->fd,2);
 337         close(this->fd);
 338 }
 339
 340 char* userrec::GetFullHost()
 341 {
 342         static char result[MAXBUF];
 343         char* t = result;
 344         for(char* n = nick; *n; n++)
 345                 *t++ = *n;
 346         *t++ = '!';
 347         for(char* n = ident; *n; n++)
 348                 *t++ = *n;
 349         *t++ = '@';
 350         for(char* n = dhost; *n; n++)
 351                 *t++ = *n;
 352         *t = 0;
 353         return result;
 354 }
 355
 356 char* userrec::MakeWildHost()
 357 {
 358         static char nresult[MAXBUF];
 359         char* t = nresult;
 360         *t++ = '*';     *t++ = '!';
 361         *t++ = '*';     *t++ = '@';
 362         for(char* n = dhost; *n; n++)
 363                 *t++ = *n;
 364         *t = 0;
 365         return nresult;
 366 }
 367
 368 int userrec::ReadData(void* buffer, size_t size)
 369 {
 370         if (IS_LOCAL(this))
 371         {
 372                 return read(this->fd, buffer, size);
 373         }
 374         else
 375                 return 0;
 376 }
 377
 378
 379 char* userrec::GetFullRealHost()
 380 {
 381         static char fresult[MAXBUF];
 382         char* t = fresult;
 383         for(char* n = nick; *n; n++)
 384                 *t++ = *n;
 385         *t++ = '!';
 386         for(char* n = ident; *n; n++)
 387                 *t++ = *n;
 388         *t++ = '@';
 389         for(char* n = host; *n; n++)
 390                 *t++ = *n;
 391         *t = 0;
 392         return fresult;
 393 }
 394
 395 bool userrec::IsInvited(irc::string &channel)
 396 {
 397         for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 398         {
 399                 irc::string compare = i->channel;
 400
 401                 if (compare == channel)
 402                 {
 403                         return true;
 404                 }
 405         }
 406         return false;
 407 }
 408
 409 InvitedList* userrec::GetInviteList()
 410 {
 411         return &invites;
 412 }
 413
 414 void userrec::InviteTo(irc::string &channel)
 415 {
 416         Invited i;
 417         i.channel = channel;
 418         invites.push_back(i);
 419 }
 420
 421 void userrec::RemoveInvite(irc::string &channel)
 422 {
 423         ServerInstance->Log(DEBUG,"Removing invites");
 424
 425         if (invites.size())
 426         {
 427                 for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 428                 {
 429                         irc::string compare = i->channel;
 430
 431                         if (compare == channel)
 432                         {
 433                                 invites.erase(i);
 434                                 return;
 435                         }
 436                 }
 437         }
 438 }
 439
 440 bool userrec::HasPermission(const std::string &command)
 441 {
 442         char* mycmd;
 443         char* savept;
 444         char* savept2;
 445
 446         /*
 447          * users on remote servers can completely bypass all permissions based checks.
 448          * This prevents desyncs when one server has different type/class tags to another.
 449          * That having been said, this does open things up to the possibility of source changes
 450          * allowing remote kills, etc - but if they have access to the src, they most likely have
 451          * access to the conf - so it's an end to a means either way.
 452          */
 453         if (!IS_LOCAL(this))
 454                 return true;
 455
 456         // are they even an oper at all?
 457         if (*this->oper)
 458         {
 459                 opertype_t::iterator iter_opertype = opertypes.find(this->oper);
 460                 if (iter_opertype != opertypes.end())
 461                 {
 462                         char* Classes = strdup(iter_opertype->second);
 463                         char* myclass = strtok_r(Classes," ",&savept);
 464                         while (myclass)
 465                         {
 466                                 operclass_t::iterator iter_operclass = operclass.find(myclass);
 467                                 if (iter_operclass != operclass.end())
 468                                 {
 469                                         char* CommandList = strdup(iter_operclass->second);
 470                                         mycmd = strtok_r(CommandList," ",&savept2);
 471                                         while (mycmd)
 472                                         {
 473                                                 if ((!strcasecmp(mycmd,command.c_str())) || (*mycmd == '*'))
 474                                                 {
 475                                                         free(Classes);
 476                                                         free(CommandList);
 477                                                         return true;
 478                                                 }
 479                                                 mycmd = strtok_r(NULL," ",&savept2);
 480                                         }
 481                                         free(CommandList);
 482                                 }
 483                                 myclass = strtok_r(NULL," ",&savept);
 484                         }
 485                         free(Classes);
 486                 }
 487         }
 488         return false;
 489 }
 490
 491 /** NOTE: We cannot pass a const reference to this method.
 492  * The string is changed by the workings of the method,
 493  * so that if we pass const ref, we end up copying it to
 494  * something we can change anyway. Makes sense to just let
 495  * the compiler do that copy for us.
 496  */
 497 bool userrec::AddBuffer(std::string a)
 498 {
 499         try
 500         {
 501                 std::string::size_type i = a.rfind('\r');
 502
 503                 while (i != std::string::npos)
 504                 {
 505                         a.erase(i, 1);
 506                         i = a.rfind('\r');
 507                 }
 508
 509                 if (a.length())
 510                         recvq.append(a);
 511
 512                 if (recvq.length() > (unsigned)this->recvqmax)
 513                 {
 514                         this->SetWriteError("RecvQ exceeded");
 515                         ServerInstance->WriteOpers("*** User %s RecvQ of %d exceeds connect class maximum of %d",this->nick,recvq.length(),this->recvqmax);
 516                         return false;
 517                 }
 518
 519                 return true;
 520         }
 521
 522         catch (...)
 523         {
 524                 ServerInstance->Log(DEBUG,"Exception in userrec::AddBuffer()");
 525                 return false;
 526         }
 527 }
 528
 529 bool userrec::BufferIsReady()
 530 {
 531         return (recvq.find('\n') != std::string::npos);
 532 }
 533
 534 void userrec::ClearBuffer()
 535 {
 536         recvq = "";
 537 }
 538
 539 std::string userrec::GetBuffer()
 540 {
 541         try
 542         {
 543                 if (!recvq.length())
 544                         return "";
 545
 546                 /* Strip any leading \r or \n off the string.
 547                  * Usually there are only one or two of these,
 548                  * so its is computationally cheap to do.
 549                  */
 550                 while ((*recvq.begin() == '\r') || (*recvq.begin() == '\n'))
 551                         recvq.erase(recvq.begin());
 552
 553                 for (std::string::iterator x = recvq.begin(); x != recvq.end(); x++)
 554                 {
 555                         /* Find the first complete line, return it as the
 556                          * result, and leave the recvq as whats left
 557                          */
 558                         if (*x == '\n')
 559                         {
 560                                 std::string ret = std::string(recvq.begin(), x);
 561                                 recvq.erase(recvq.begin(), x + 1);
 562                                 return ret;
 563                         }
 564                 }
 565                 return "";
 566         }
 567
 568         catch (...)
 569         {
 570                 ServerInstance->Log(DEBUG,"Exception in userrec::GetBuffer()");
 571                 return "";
 572         }
 573 }
 574
 575 void userrec::AddWriteBuf(const std::string &data)
 576 {
 577         if (*this->GetWriteError())
 578                 return;
 579
 580         if (sendq.length() + data.length() > (unsigned)this->sendqmax)
 581         {
 582                 /*
 583                  * Fix by brain - Set the error text BEFORE calling writeopers, because
 584                  * if we dont it'll recursively  call here over and over again trying
 585                  * to repeatedly add the text to the sendq!
 586                  */
 587                 this->SetWriteError("SendQ exceeded");
 588                 ServerInstance->WriteOpers("*** User %s SendQ of %d exceeds connect class maximum of %d",this->nick,sendq.length() + data.length(),this->sendqmax);
 589                 return;
 590         }
 591
 592         try
 593         {
 594                 if (data.length() > 512)
 595                 {
 596                         std::string newdata(data);
 597                         newdata.resize(510);
 598                         newdata.append("\r\n");
 599                         sendq.append(newdata);
 600                 }
 601                 else
 602                 {
 603                         sendq.append(data);
 604                 }
 605         }
 606         catch (...)
 607         {
 608                 this->SetWriteError("SendQ exceeded");
 609                 ServerInstance->WriteOpers("*** User %s SendQ got an exception",this->nick);
 610         }
 611 }
 612
 613 // send AS MUCH OF THE USERS SENDQ as we are able to (might not be all of it)
 614 void userrec::FlushWriteBuf()
 615 {
 616         try
 617         {
 618                 if (this->fd == FD_MAGIC_NUMBER)
 619                 {
 620                         sendq = "";
 621                 }
 622                 if ((sendq.length()) && (this->fd != FD_MAGIC_NUMBER))
 623                 {
 624                         const char* tb = this->sendq.c_str();
 625                                 int n_sent = write(this->fd,tb,this->sendq.length());
 626                         if (n_sent == -1)
 627                         {
 628                                 if (errno != EAGAIN)
 629                                         this->SetWriteError(strerror(errno));
 630                         }
 631                         else
 632                         {
 633                                 // advance the queue
 634                                 tb += n_sent;
 635                                 this->sendq = tb;
 636                                 // update the user's stats counters
 637                                 this->bytes_out += n_sent;
 638                                 this->cmds_out++;
 639                         }
 640                 }
 641         }
 642
 643         catch (...)
 644         {
 645                 ServerInstance->Log(DEBUG,"Exception in userrec::FlushWriteBuf()");
 646         }
 647 }
 648
 649 void userrec::SetWriteError(const std::string &error)
 650 {
 651         try
 652         {
 653                 ServerInstance->Log(DEBUG,"SetWriteError: %s",error.c_str());
 654                 // don't try to set the error twice, its already set take the first string.
 655                 if (!this->WriteError.length())
 656                 {
 657                         ServerInstance->Log(DEBUG,"Setting error string for %s to '%s'",this->nick,error.c_str());
 658                         this->WriteError = error;
 659                 }
 660         }
 661
 662         catch (...)
 663         {
 664                 ServerInstance->Log(DEBUG,"Exception in userrec::SetWriteError()");
 665         }
 666 }
 667
 668 const char* userrec::GetWriteError()
 669 {
 670         return this->WriteError.c_str();
 671 }
 672
 673 void userrec::Oper(const std::string &opertype)
 674 {
 675         try
 676         {
 677                 this->modes[UM_OPERATOR] = 1;
 678                 this->WriteServ("MODE %s :+o", this->nick);
 679                 FOREACH_MOD(I_OnOper, OnOper(this, opertype));
 680                 ServerInstance->Log(DEFAULT,"OPER: %s!%s@%s opered as type: %s", this->nick, this->ident, this->host, opertype.c_str());
 681                 strlcpy(this->oper, opertype.c_str(), NICKMAX - 1);
 682                 ServerInstance->all_opers.push_back(this);
 683                 FOREACH_MOD(I_OnPostOper,OnPostOper(this, opertype));
 684         }
 685
 686         catch (...)
 687         {
 688                 ServerInstance->Log(DEBUG,"Exception in userrec::Oper()");
 689         }
 690 }
 691
 692 void userrec::UnOper()
 693 {
 694         try
 695         {
 696                 if (*this->oper)
 697                 {
 698                         *this->oper = 0;
 699                                 this->modes[UM_OPERATOR] = 0;
 700                         for (std::vector<userrec*>::iterator a = ServerInstance->all_opers.begin(); a < ServerInstance->all_opers.end(); a++)
 701                         {
 702                                 if (*a == this)
 703                                 {
 704                                         ServerInstance->Log(DEBUG,"Oper removed from optimization list");
 705                                         ServerInstance->all_opers.erase(a);
 706                                         return;
 707                                 }
 708                         }
 709                 }
 710         }
 711
 712         catch (...)
 713         {
 714                 ServerInstance->Log(DEBUG,"Exception in userrec::UnOper()");
 715         }
 716 }
 717
 718 void userrec::QuitUser(InspIRCd* Instance, userrec *user,const std::string &quitreason)
 719 {
 720         user_hash::iterator iter = Instance->clientlist.find(user->nick);
 721
 722 /*
 723  * I'm pretty sure returning here is causing a desync when part of the net thinks a user is gone,
 724  * and another part doesn't. We want to broadcast the quit/kill before bailing so the net stays in sync.
 725  *
 726  * I can't imagine this blowing up, so I'm commenting it out. We still check
 727  * before playing with a bad iterator below in our if(). DISCUSS THIS BEFORE YOU DO ANYTHING. --w00t
 728  *
 729  *      if (iter == clientlist.end())
 730  *              return;
 731  */
 732         std::string reason = quitreason;
 733
 734         if (reason.length() > MAXQUIT - 1)
 735                 reason.resize(MAXQUIT - 1);
 736
 737         if (IS_LOCAL(user))
 738                 user->Write("ERROR :Closing link (%s@%s) [%s]",user->ident,user->host,reason.c_str());
 739
 740         if (user->registered == REG_ALL)
 741         {
 742                 user->PurgeEmptyChannels();
 743                 FOREACH_MOD_I(Instance,I_OnUserQuit,OnUserQuit(user,reason));
 744                 user->WriteCommonExcept("QUIT :%s",reason.c_str());
 745         }
 746
 747         if (IS_LOCAL(user))
 748                 user->FlushWriteBuf();
 749
 750         FOREACH_MOD_I(Instance,I_OnUserDisconnect,OnUserDisconnect(user));
 751
 752         if (IS_LOCAL(user))
 753         {
 754                 if (Instance->Config->GetIOHook(user->GetPort()))
 755                 {
 756                         try
 757                         {
 758                                 Instance->Config->GetIOHook(user->GetPort())->OnRawSocketClose(user->fd);
 759                         }
 760                         catch (ModuleException& modexcept)
 761                         {
 762                                 Instance->Log(DEBUG,"Module exception cought: %s",modexcept.GetReason());
 763                         }
 764                 }
 765
 766                 Instance->SE->DelFd(user);
 767                 user->CloseSocket();
 768         }
 769
 770         /*
 771          * this must come before the ServerInstance->SNO->WriteToSnoMaskso that it doesnt try to fill their buffer with anything
 772          * if they were an oper with +sn +qQ.
 773          */
 774         if (user->registered == REG_ALL)
 775         {
 776                 if (IS_LOCAL(user))
 777                         Instance->SNO->WriteToSnoMask('q',"Client exiting: %s!%s@%s [%s]",user->nick,user->ident,user->host,reason.c_str());
 778                 else
 779                         Instance->SNO->WriteToSnoMask('Q',"Client exiting on server %s: %s!%s@%s [%s]",user->server,user->nick,user->ident,user->host,reason.c_str());
 780                 user->AddToWhoWas();
 781         }
 782
 783         if (iter != Instance->clientlist.end())
 784         {
 785                 Instance->Log(DEBUG,"deleting user hash value %lx",(unsigned long)user);
 786                 if (IS_LOCAL(user))
 787                 {
 788                         if (find(Instance->local_users.begin(),Instance->local_users.end(),user) != Instance->local_users.end())
 789                                 Instance->local_users.erase(find(Instance->local_users.begin(),Instance->local_users.end(),user));
 790                 }
 791                 Instance->clientlist.erase(iter);
 792                 DELETE(user);
 793         }
 794 }
 795
 796 namespace irc
 797 {
 798         namespace whowas
 799         {
 800
 801                 WhoWasGroup::WhoWasGroup(userrec* user) : host(NULL), dhost(NULL), ident(NULL), server(NULL), gecos(NULL), signon(user->signon)
 802                 {
 803                         this->host = strdup(user->host);
 804                         this->dhost = strdup(user->dhost);
 805                         this->ident = strdup(user->ident);
 806                         this->server = user->server;
 807                         this->gecos = strdup(user->fullname);
 808                 }
 809
 810                 WhoWasGroup::~WhoWasGroup()
 811                 {
 812                         if (host)
 813                                 free(host);
 814                         if (dhost)
 815                                 free(dhost);
 816                         if (ident)
 817                                 free(ident);
 818                         if (gecos)
 819                                 free(gecos);
 820                 }
 821
 822                 /* every hour, run this function which removes all entries over 3 days */
 823                 void MaintainWhoWas(time_t t)
 824                 {
 825                         for (whowas_users::iterator iter = ::whowas.begin(); iter != ::whowas.end(); iter++)
 826                         {
 827                                 whowas_set* n = (whowas_set*)iter->second;
 828                                 if (n->size())
 829                                 {
 830                                         while ((n->begin() != n->end()) && ((*n->begin())->signon < t - 259200)) // 3 days
 831                                         {
 832                                                 WhoWasGroup *a = *(n->begin());
 833                                                 DELETE(a);
 834                                                 n->erase(n->begin());
 835                                         }
 836                                 }
 837                         }
 838                 }
 839         };
 840 };
 841
 842 /* adds or updates an entry in the whowas list */
 843 void userrec::AddToWhoWas()
 844 {
 845         irc::whowas::whowas_users::iterator iter = whowas.find(this->nick);
 846
 847         if (iter == whowas.end())
 848         {
 849                 irc::whowas::whowas_set* n = new irc::whowas::whowas_set;
 850                 irc::whowas::WhoWasGroup *a = new irc::whowas::WhoWasGroup(this);
 851                 n->push_back(a);
 852                 whowas[this->nick] = n;
 853         }
 854         else
 855         {
 856                 irc::whowas::whowas_set* group = (irc::whowas::whowas_set*)iter->second;
 857
 858                 if (group->size() > 10)
 859                 {
 860                         irc::whowas::WhoWasGroup *a = (irc::whowas::WhoWasGroup*)*(group->begin());
 861                         DELETE(a);
 862                         group->pop_front();
 863                 }
 864
 865                 irc::whowas::WhoWasGroup *a = new irc::whowas::WhoWasGroup(this);
 866                 group->push_back(a);
 867         }
 868 }
 869
 870 /* add a client connection to the sockets list */
 871 void userrec::AddClient(InspIRCd* Instance, int socket, int port, bool iscached, insp_inaddr ip)
 872 {
 873         std::string tempnick = ConvToStr(socket) + "-unknown";
 874         user_hash::iterator iter = Instance->clientlist.find(tempnick);
 875         const char *ipaddr = insp_ntoa(ip);
 876         userrec* _new;
 877         int j = 0;
 878
 879         /*
 880          * fix by brain.
 881          * as these nicknames are 'RFC impossible', we can be sure nobody is going to be
 882          * using one as a registered connection. As they are per fd, we can also safely assume
 883          * that we wont have collisions. Therefore, if the nick exists in the list, its only
 884          * used by a dead socket, erase the iterator so that the new client may reclaim it.
 885          * this was probably the cause of 'server ignores me when i hammer it with reconnects'
 886          * issue in earlier alphas/betas
 887          */
 888         if (iter != Instance->clientlist.end())
 889         {
 890                 userrec* goner = iter->second;
 891                 DELETE(goner);
 892                 Instance->clientlist.erase(iter);
 893         }
 894
 895         Instance->Log(DEBUG,"AddClient: %d %d %s",socket,port,ipaddr);
 896
 897         _new = new userrec(Instance);
 898         Instance->clientlist[tempnick] = _new;
 899         _new->fd = socket;
 900         strlcpy(_new->nick,tempnick.c_str(),NICKMAX-1);
 901
 902         _new->server = Instance->FindServerNamePtr(Instance->Config->ServerName);
 903         /* We don't need range checking here, we KNOW 'unknown\0' will fit into the ident field. */
 904         strcpy(_new->ident, "unknown");
 905
 906         _new->registered = REG_NONE;
 907         _new->signon = Instance->Time() + Instance->Config->dns_timeout;
 908         _new->lastping = 1;
 909
 910         Instance->Log(DEBUG,"Setting socket addresses");
 911         _new->SetSockAddr(AF_FAMILY, ipaddr, port);
 912         Instance->Log(DEBUG,"Socket addresses set.");
 913
 914         /* Smarter than your average bear^H^H^H^Hset of strlcpys. */
 915         for (const char* temp = _new->GetIPString(); *temp && j < 64; temp++, j++)
 916                 _new->dhost[j] = _new->host[j] = *temp;
 917         _new->dhost[j] = _new->host[j] = 0;
 918
 919         // set the registration timeout for this user
 920         unsigned long class_regtimeout = 90;
 921         int class_flood = 0;
 922         long class_threshold = 5;
 923         long class_sqmax = 262144;      // 256kb
 924         long class_rqmax = 4096;        // 4k
 925
 926         for (ClassVector::iterator i = Instance->Config->Classes.begin(); i != Instance->Config->Classes.end(); i++)
 927         {
 928                 if ((i->type == CC_ALLOW) && (match(ipaddr,i->host.c_str(),true)))
 929                 {
 930                         class_regtimeout = (unsigned long)i->registration_timeout;
 931                         class_flood = i->flood;
 932                         _new->pingmax = i->pingtime;
 933                         class_threshold = i->threshold;
 934                         class_sqmax = i->sendqmax;
 935                         class_rqmax = i->recvqmax;
 936                         break;
 937                 }
 938         }
 939
 940         _new->nping = Instance->Time() + _new->pingmax + Instance->Config->dns_timeout;
 941         _new->timeout = Instance->Time() + class_regtimeout;
 942         _new->flood = class_flood;
 943         _new->threshold = class_threshold;
 944         _new->sendqmax = class_sqmax;
 945         _new->recvqmax = class_rqmax;
 946
 947         Instance->local_users.push_back(_new);
 948
 949         if (Instance->local_users.size() > Instance->Config->SoftLimit)
 950         {
 951                 userrec::QuitUser(Instance, _new,"No more connections allowed");
 952                 return;
 953         }
 954
 955         if (Instance->local_users.size() >= MAXCLIENTS)
 956         {
 957                 userrec::QuitUser(Instance, _new,"No more connections allowed");
 958                 return;
 959         }
 960
 961         /*
 962          * XXX -
 963          * this is done as a safety check to keep the file descriptors within range of fd_ref_table.
 964          * its a pretty big but for the moment valid assumption:
 965          * file descriptors are handed out starting at 0, and are recycled as theyre freed.
 966          * therefore if there is ever an fd over 65535, 65536 clients must be connected to the
 967          * irc server at once (or the irc server otherwise initiating this many connections, files etc)
 968          * which for the time being is a physical impossibility (even the largest networks dont have more
 969          * than about 10,000 users on ONE server!)
 970          */
 971         if ((unsigned)socket >= MAX_DESCRIPTORS)
 972         {
 973                 userrec::QuitUser(Instance, _new,"Server is full");
 974                 return;
 975         }
 976         ELine* e = Instance->XLines->matches_exception(_new);
 977         if (!e)
 978         {
 979                 ZLine* r = Instance->XLines->matches_zline(ipaddr);
 980                 if (r)
 981                 {
 982                         char reason[MAXBUF];
 983                         snprintf(reason,MAXBUF,"Z-Lined: %s",r->reason);
 984                         userrec::QuitUser(Instance, _new,reason);
 985                         return;
 986                 }
 987         }
 988
 989         if (socket > -1)
 990         {
 991                 if (!Instance->SE->AddFd(_new))
 992                 {
 993                         userrec::QuitUser(Instance, _new, "Internal error handling connection");
 994                         return;
 995                 }
 996         }
 997
 998         _new->WriteServ("NOTICE Auth :*** Looking up your hostname...");
 999 }
1000
1001 long userrec::GlobalCloneCount()
1002 {
1003         char u1[128] = {0};
1004         char u2[128] = {0};
1005         long x = 0;
1006
1007         this->GetIPString(u2);
1008
1009         for (user_hash::const_iterator a = ServerInstance->clientlist.begin(); a != ServerInstance->clientlist.end(); a++)
1010         {
1011                 /* We have to match ip's as strings - we don't know what protocol
1012                  * a remote user may be using
1013                  */
1014                 if (strcmp(a->second->GetIPString(u1), u2) == 0)
1015                         x++;
1016         }
1017
1018         return x;
1019 }
1020
1021 long userrec::LocalCloneCount()
1022 {
1023         long x = 0;
1024         for (std::vector<userrec*>::const_iterator a = ServerInstance->local_users.begin(); a != ServerInstance->local_users.end(); a++)
1025         {
1026                 userrec* comp = *a;
1027 #ifdef IPV6
1028                 /* I dont think theres any faster way of matching two ipv6 addresses than memcmp */
1029                 in6_addr* s1 = &(((sockaddr_in6*)comp->ip)->sin6_addr);
1030                 in6_addr* s2 = &(((sockaddr_in6*)this->ip)->sin6_addr);
1031                 if (!memcmp(s1->s6_addr, s2->s6_addr, sizeof(in6_addr)))
1032                         x++;
1033 #else
1034                 in_addr* s1 = &((sockaddr_in*)comp->ip)->sin_addr;
1035                 in_addr* s2 = &((sockaddr_in*)this->ip)->sin_addr;
1036                 if (s1->s_addr == s2->s_addr)
1037                         x++;
1038 #endif
1039         }
1040         return x;
1041 }
1042
1043 void userrec::FullConnect(CullList* Goners)
1044 {
1045         ServerInstance->stats->statsConnects++;
1046         this->idle_lastmsg = ServerInstance->Time();
1047
1048         ConnectClass a = this->GetClass();
1049
1050         if (a.type == CC_DENY)
1051         {
1052                 Goners->AddItem(this,"Unauthorised connection");
1053                 return;
1054         }
1055
1056         if ((*(a.pass.c_str())) && (!this->haspassed))
1057         {
1058                 Goners->AddItem(this,"Invalid password");
1059                 return;
1060         }
1061
1062         if (this->LocalCloneCount() > a.maxlocal)
1063         {
1064                 Goners->AddItem(this, "No more connections allowed from your host via this connect class (local)");
1065                 ServerInstance->WriteOpers("*** WARNING: maximum LOCAL connections (%ld) exceeded for IP %s", a.maxlocal, this->GetIPString());
1066                 return;
1067         }
1068         else if (this->GlobalCloneCount() > a.maxglobal)
1069         {
1070                 Goners->AddItem(this, "No more connections allowed from your host via this connect class (global)");
1071                 ServerInstance->WriteOpers("*** WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s",a.maxglobal, this->GetIPString());
1072                 return;
1073         }
1074
1075         ELine* e = ServerInstance->XLines->matches_exception(this);
1076
1077         if (!e)
1078         {
1079                 GLine* r = ServerInstance->XLines->matches_gline(this);
1080
1081                 if (r)
1082                 {
1083                         char reason[MAXBUF];
1084                         snprintf(reason,MAXBUF,"G-Lined: %s",r->reason);
1085                         Goners->AddItem(this, reason);
1086                         return;
1087                 }
1088
1089                 KLine* n = ServerInstance->XLines->matches_kline(this);
1090
1091                 if (n)
1092                 {
1093                         char reason[MAXBUF];
1094                         snprintf(reason,MAXBUF,"K-Lined: %s",n->reason);
1095                         Goners->AddItem(this, reason);
1096                         return;
1097                 }
1098         }
1099
1100
1101         this->WriteServ("NOTICE Auth :Welcome to \002%s\002!",ServerInstance->Config->Network);
1102         this->WriteServ("001 %s :Welcome to the %s IRC Network %s!%s@%s",this->nick, ServerInstance->Config->Network, this->nick, this->ident, this->host);
1103         this->WriteServ("002 %s :Your host is %s, running version %s",this->nick,ServerInstance->Config->ServerName,VERSION);
1104         this->WriteServ("003 %s :This server was created %s %s", this->nick, __TIME__, __DATE__);
1105         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());
1106
1107         // anfl @ #ratbox, efnet reminded me that according to the RFC this cant contain more than 13 tokens per line...
1108         // so i'd better split it :)
1109         std::stringstream out(ServerInstance->Config->data005);
1110         std::string token = "";
1111         std::string line5 = "";
1112         int token_counter = 0;
1113
1114         while (!out.eof())
1115         {
1116                 out >> token;
1117                 line5 = line5 + token + " ";
1118                 token_counter++;
1119
1120                 if ((token_counter >= 13) || (out.eof() == true))
1121                 {
1122                         this->WriteServ("005 %s %s:are supported by this server", this->nick, line5.c_str());
1123                         line5 = "";
1124                         token_counter = 0;
1125                 }
1126         }
1127
1128         this->ShowMOTD();
1129
1130         /*
1131          * fix 3 by brain, move registered = 7 below these so that spurious modes and host
1132          * changes dont go out onto the network and produce 'fake direction'.
1133          */
1134         FOREACH_MOD(I_OnUserConnect,OnUserConnect(this));
1135         FOREACH_MOD(I_OnPostConnect,OnPostConnect(this));
1136         this->registered = REG_ALL;
1137         ServerInstance->SNO->WriteToSnoMask('c',"Client connecting on port %d: %s!%s@%s [%s]", this->GetPort(), this->nick, this->ident, this->host, this->GetIPString());
1138 }
1139
1140 /** userrec::UpdateNick()
1141  * re-allocates a nick in the user_hash after they change nicknames,
1142  * returns a pointer to the new user as it may have moved
1143  */
1144 userrec* userrec::UpdateNickHash(const char* New)
1145 {
1146         try
1147         {
1148                 //user_hash::iterator newnick;
1149                 user_hash::iterator oldnick = ServerInstance->clientlist.find(this->nick);
1150
1151                 if (!strcasecmp(this->nick,New))
1152                         return oldnick->second;
1153
1154                 if (oldnick == ServerInstance->clientlist.end())
1155                         return NULL; /* doesnt exist */
1156
1157                 userrec* olduser = oldnick->second;
1158                 ServerInstance->clientlist[New] = olduser;
1159                 ServerInstance->clientlist.erase(oldnick);
1160                 return ServerInstance->clientlist[New];
1161         }
1162
1163         catch (...)
1164         {
1165                 ServerInstance->Log(DEBUG,"Exception in userrec::UpdateNickHash()");
1166                 return NULL;
1167         }
1168 }
1169
1170 bool userrec::ForceNickChange(const char* newnick)
1171 {
1172         try
1173         {
1174                 int MOD_RESULT = 0;
1175
1176                 FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(this, newnick));
1177
1178                 if (MOD_RESULT)
1179                 {
1180                         ServerInstance->stats->statsCollisions++;
1181                         return false;
1182                 }
1183
1184                 if (ServerInstance->XLines->matches_qline(newnick))
1185                 {
1186                         ServerInstance->stats->statsCollisions++;
1187                         return false;
1188                 }
1189
1190                 if (this->registered == REG_ALL)
1191                 {
1192                         const char* pars[1];
1193                         pars[0] = newnick;
1194                         std::string cmd = "NICK";
1195                         return (ServerInstance->Parser->CallHandler(cmd, pars, 1, this) == CMD_SUCCESS);
1196                 }
1197                 return false;
1198         }
1199
1200         catch (...)
1201         {
1202                 ServerInstance->Log(DEBUG,"Exception in userrec::ForceNickChange()");
1203                 return false;
1204         }
1205 }
1206
1207 void userrec::SetSockAddr(int protocol_family, const char* ip, int port)
1208 {
1209         switch (protocol_family)
1210         {
1211 #ifdef SUPPORT_IP6LINKS
1212                 case AF_INET6:
1213                 {
1214                         ServerInstance->Log(DEBUG,"Set inet6 protocol address");
1215                         sockaddr_in6* sin = new sockaddr_in6;
1216                         sin->sin6_family = AF_INET6;
1217                         sin->sin6_port = port;
1218                         inet_pton(AF_INET6, ip, &sin->sin6_addr);
1219                         this->ip = (sockaddr*)sin;
1220                 }
1221                 break;
1222 #endif
1223                 case AF_INET:
1224                 {
1225                         ServerInstance->Log(DEBUG,"Set inet4 protocol address");
1226                         sockaddr_in* sin = new sockaddr_in;
1227                         sin->sin_family = AF_INET;
1228                         sin->sin_port = port;
1229                         inet_pton(AF_INET, ip, &sin->sin_addr);
1230                         this->ip = (sockaddr*)sin;
1231                 }
1232                 break;
1233                 default:
1234                         ServerInstance->Log(DEBUG,"Ut oh, I dont know protocol %d to be set on '%s'!", protocol_family, this->nick);
1235                 break;
1236         }
1237 }
1238
1239 int userrec::GetPort()
1240 {
1241         if (this->ip == NULL)
1242                 return 0;
1243
1244         switch (this->GetProtocolFamily())
1245         {
1246 #ifdef SUPPORT_IP6LINKS
1247                 case AF_INET6:
1248                 {
1249                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1250                         return sin->sin6_port;
1251                 }
1252                 break;
1253 #endif
1254                 case AF_INET:
1255                 {
1256                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1257                         return sin->sin_port;
1258                 }
1259                 break;
1260                 default:
1261                         ServerInstance->Log(DEBUG,"Ut oh, '%s' has an unknown protocol family!",this->nick);
1262                 break;
1263         }
1264         return 0;
1265 }
1266
1267 int userrec::GetProtocolFamily()
1268 {
1269         if (this->ip == NULL)
1270                 return 0;
1271
1272         sockaddr_in* sin = (sockaddr_in*)this->ip;
1273         return sin->sin_family;
1274 }
1275
1276 const char* userrec::GetIPString()
1277 {
1278         static char buf[1024];
1279
1280         if (this->ip == NULL)
1281                 return "";
1282
1283         switch (this->GetProtocolFamily())
1284         {
1285 #ifdef SUPPORT_IP6LINKS
1286                 case AF_INET6:
1287                 {
1288                         static char temp[1024];
1289
1290                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1291                         inet_ntop(sin->sin6_family, &sin->sin6_addr, buf, sizeof(buf));
1292                         /* IP addresses starting with a : on irc are a Bad Thing (tm) */
1293                         if (*buf == ':')
1294                         {
1295                                 strlcpy(&temp[1], buf, sizeof(temp));
1296                                 *temp = '0';
1297                                 return temp;
1298                         }
1299                         return buf;
1300                 }
1301                 break;
1302 #endif
1303                 case AF_INET:
1304                 {
1305                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1306                         inet_ntop(sin->sin_family, &sin->sin_addr, buf, sizeof(buf));
1307                         return buf;
1308                 }
1309                 break;
1310                 default:
1311                         ServerInstance->Log(DEBUG,"Ut oh, '%s' has an unknown protocol family!",this->nick);
1312                 break;
1313         }
1314         return "";
1315 }
1316
1317 const char* userrec::GetIPString(char* buf)
1318 {
1319         if (this->ip == NULL)
1320         {
1321                 *buf = 0;
1322                 return buf;
1323         }
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                                 strlcpy(buf, temp, sizeof(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
1353                 default:
1354                         ServerInstance->Log(DEBUG,"Ut oh, '%s' has an unknown protocol family!",this->nick);
1355                 break;
1356         }
1357         return "";
1358 }
1359
1360 /** NOTE: We cannot pass a const reference to this method.
1361  * The string is changed by the workings of the method,
1362  * so that if we pass const ref, we end up copying it to
1363  * something we can change anyway. Makes sense to just let
1364  * the compiler do that copy for us.
1365  */
1366 void userrec::Write(std::string text)
1367 {
1368         if ((this->fd < 0) || (this->fd > MAX_DESCRIPTORS))
1369                 return;
1370
1371         try
1372         {
1373                 text.append("\r\n");
1374         }
1375         catch (...)
1376         {
1377                 ServerInstance->Log(DEBUG,"Exception in userrec::Write() std::string::append");
1378                 return;
1379         }
1380
1381         if (ServerInstance->Config->GetIOHook(this->GetPort()))
1382         {
1383                 try
1384                 {
1385                         ServerInstance->Config->GetIOHook(this->GetPort())->OnRawSocketWrite(this->fd, text.data(), text.length());
1386                 }
1387                 catch (ModuleException& modexcept)
1388                 {
1389                         ServerInstance->Log(DEBUG,"Module exception caught: %s",modexcept.GetReason());
1390                 }
1391         }
1392         else
1393         {
1394                 this->AddWriteBuf(text);
1395         }
1396         ServerInstance->stats->statsSent += text.length();
1397 }
1398
1399 /** Write()
1400  */
1401 void userrec::Write(const char *text, ...)
1402 {
1403         va_list argsPtr;
1404         char textbuffer[MAXBUF];
1405
1406         va_start(argsPtr, text);
1407         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1408         va_end(argsPtr);
1409
1410         this->Write(std::string(textbuffer));
1411 }
1412
1413 void userrec::WriteServ(const std::string& text)
1414 {
1415         char textbuffer[MAXBUF];
1416
1417         snprintf(textbuffer,MAXBUF,":%s %s",ServerInstance->Config->ServerName,text.c_str());
1418         this->Write(std::string(textbuffer));
1419 }
1420
1421 /** WriteServ()
1422  *  Same as Write(), except `text' is prefixed with `:server.name '.
1423  */
1424 void userrec::WriteServ(const char* text, ...)
1425 {
1426         va_list argsPtr;
1427         char textbuffer[MAXBUF];
1428
1429         va_start(argsPtr, text);
1430         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1431         va_end(argsPtr);
1432
1433         this->WriteServ(std::string(textbuffer));
1434 }
1435
1436
1437 void userrec::WriteFrom(userrec *user, const std::string &text)
1438 {
1439         char tb[MAXBUF];
1440
1441         snprintf(tb,MAXBUF,":%s %s",user->GetFullHost(),text.c_str());
1442
1443         this->Write(std::string(tb));
1444 }
1445
1446
1447 /* write text from an originating user to originating user */
1448
1449 void userrec::WriteFrom(userrec *user, const char* text, ...)
1450 {
1451         va_list argsPtr;
1452         char textbuffer[MAXBUF];
1453
1454         va_start(argsPtr, text);
1455         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1456         va_end(argsPtr);
1457
1458         this->WriteFrom(user, std::string(textbuffer));
1459 }
1460
1461
1462 /* write text to an destination user from a source user (e.g. user privmsg) */
1463
1464 void userrec::WriteTo(userrec *dest, const char *data, ...)
1465 {
1466         char textbuffer[MAXBUF];
1467         va_list argsPtr;
1468
1469         va_start(argsPtr, data);
1470         vsnprintf(textbuffer, MAXBUF, data, argsPtr);
1471         va_end(argsPtr);
1472
1473         this->WriteTo(dest, std::string(textbuffer));
1474 }
1475
1476 void userrec::WriteTo(userrec *dest, const std::string &data)
1477 {
1478         dest->WriteFrom(this, data);
1479 }
1480
1481
1482 void userrec::WriteCommon(const char* text, ...)
1483 {
1484         char textbuffer[MAXBUF];
1485         va_list argsPtr;
1486
1487         if (this->registered != REG_ALL)
1488                 return;
1489
1490         va_start(argsPtr, text);
1491         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1492         va_end(argsPtr);
1493
1494         this->WriteCommon(std::string(textbuffer));
1495 }
1496
1497 void userrec::WriteCommon(const std::string &text)
1498 {
1499         try
1500         {
1501                 bool sent_to_at_least_one = false;
1502
1503                 if (this->registered != REG_ALL)
1504                         return;
1505
1506                 uniq_id++;
1507
1508                 for (std::vector<ucrec*>::const_iterator v = this->chans.begin(); v != this->chans.end(); v++)
1509                 {
1510                         ucrec *n = *v;
1511                         if (n->channel)
1512                         {
1513                                 CUList *ulist= n->channel->GetUsers();
1514
1515                                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1516                                 {
1517                                         if ((IS_LOCAL(i->second)) && (already_sent[i->second->fd] != uniq_id))
1518                                         {
1519                                                 already_sent[i->second->fd] = uniq_id;
1520                                                 i->second->WriteFrom(this, std::string(text));
1521                                                 sent_to_at_least_one = true;
1522                                         }
1523                                 }
1524                         }
1525                 }
1526
1527                 /*
1528                  * if the user was not in any channels, no users will receive the text. Make sure the user
1529                  * receives their OWN message for WriteCommon
1530                  */
1531                 if (!sent_to_at_least_one)
1532                 {
1533                         this->WriteFrom(this,std::string(text));
1534                 }
1535         }
1536
1537         catch (...)
1538         {
1539                 ServerInstance->Log(DEBUG,"Exception in userrec::WriteCommon()");
1540         }
1541 }
1542
1543
1544 /* write a formatted string to all users who share at least one common
1545  * channel, NOT including the source user e.g. for use in QUIT
1546  */
1547
1548 void userrec::WriteCommonExcept(const char* text, ...)
1549 {
1550         char textbuffer[MAXBUF];
1551         va_list argsPtr;
1552
1553         va_start(argsPtr, text);
1554         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1555         va_end(argsPtr);
1556
1557         this->WriteCommonExcept(std::string(textbuffer));
1558 }
1559
1560 void userrec::WriteCommonExcept(const std::string &text)
1561 {
1562         bool quit_munge = false;
1563         char oper_quit[MAXBUF];
1564         char textbuffer[MAXBUF];
1565
1566         strlcpy(textbuffer, text.c_str(), MAXBUF);
1567
1568         if (this->registered != REG_ALL)
1569                 return;
1570
1571         uniq_id++;
1572
1573         /* TODO: We need some form of WriteCommonExcept that will send two lines, one line to
1574          * opers and the other line to non-opers, then all this hidebans and hidesplits gunk
1575          * can go byebye.
1576          */
1577         if (ServerInstance->Config->HideSplits)
1578         {
1579                 char* check = textbuffer + 6;
1580
1581                 if (!strncasecmp(textbuffer, "QUIT :",6))
1582                 {
1583                         std::stringstream split(check);
1584                         std::string server_one;
1585                         std::string server_two;
1586
1587                         split >> server_one;
1588                         split >> server_two;
1589
1590                         if ((ServerInstance->FindServerName(server_one)) && (ServerInstance->FindServerName(server_two)))
1591                         {
1592                                 strlcpy(oper_quit,textbuffer,MAXQUIT);
1593                                 strlcpy(check,"*.net *.split",MAXQUIT);
1594                                 quit_munge = true;
1595                         }
1596                 }
1597         }
1598
1599         if ((ServerInstance->Config->HideBans) && (!quit_munge))
1600         {
1601                 if ((!strncasecmp(textbuffer, "QUIT :G-Lined:",14)) || (!strncasecmp(textbuffer, "QUIT :K-Lined:",14))
1602                 || (!strncasecmp(textbuffer, "QUIT :Q-Lined:",14)) || (!strncasecmp(textbuffer, "QUIT :Z-Lined:",14)))
1603                 {
1604                         char* check = textbuffer + 13;
1605                         strlcpy(oper_quit,textbuffer,MAXQUIT);
1606                         *check = 0;  // We don't need to strlcpy, we just chop it from the :
1607                         quit_munge = true;
1608                 }
1609         }
1610
1611         for (std::vector<ucrec*>::const_iterator v = this->chans.begin(); v != this->chans.end(); v++)
1612         {
1613                 ucrec* n = *v;
1614                 if (n->channel)
1615                 {
1616                         CUList *ulist= n->channel->GetUsers();
1617
1618                         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1619                         {
1620                                 if (this != i->second)
1621                                 {
1622                                         if ((IS_LOCAL(i->second)) && (already_sent[i->second->fd] != uniq_id))
1623                                         {
1624                                                 already_sent[i->second->fd] = uniq_id;
1625                                                 if (quit_munge)
1626                                                         i->second->WriteFrom(this, *i->second->oper ? std::string(oper_quit) : std::string(textbuffer));
1627                                                 else
1628                                                         i->second->WriteFrom(this, std::string(textbuffer));
1629                                         }
1630                                 }
1631                         }
1632                 }
1633         }
1634
1635 }
1636
1637 void userrec::WriteWallOps(const std::string &text)
1638 {
1639         /* Does nothing if theyre not opered */
1640         if ((!*this->oper) && (IS_LOCAL(this)))
1641                 return;
1642
1643         std::string wallop = "WALLOPS :";
1644
1645         try
1646         {
1647                 wallop.append(text);
1648         }
1649         catch (...)
1650         {
1651                 ServerInstance->Log(DEBUG,"Exception in userrec::Write() std::string::append");
1652                 return;
1653         }
1654
1655         for (std::vector<userrec*>::const_iterator i = ServerInstance->local_users.begin(); i != ServerInstance->local_users.end(); i++)
1656         {
1657                 userrec* t = *i;
1658                 if ((IS_LOCAL(t)) && (t->modes[UM_WALLOPS]))
1659                         this->WriteTo(t,wallop);
1660         }
1661 }
1662
1663 void userrec::WriteWallOps(const char* text, ...)
1664 {
1665         char textbuffer[MAXBUF];
1666         va_list argsPtr;
1667
1668         va_start(argsPtr, text);
1669         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1670         va_end(argsPtr);
1671
1672         this->WriteWallOps(std::string(textbuffer));
1673 }
1674
1675 /* return 0 or 1 depending if users u and u2 share one or more common channels
1676  * (used by QUIT, NICK etc which arent channel specific notices)
1677  *
1678  * The old algorithm in 1.0 for this was relatively inefficient, iterating over
1679  * the first users channels then the second users channels within the outer loop,
1680  * therefore it was a maximum of x*y iterations (upon returning 0 and checking
1681  * all possible iterations). However this new function instead checks against the
1682  * channel's userlist in the inner loop which is a std::map<userrec*,userrec*>
1683  * and saves us time as we already know what pointer value we are after.
1684  * Don't quote me on the maths as i am not a mathematician or computer scientist,
1685  * but i believe this algorithm is now x+(log y) maximum iterations instead.
1686  */
1687 bool userrec::SharesChannelWith(userrec *other)
1688 {
1689         if ((!other) || (this->registered != REG_ALL) || (other->registered != REG_ALL))
1690                 return false;
1691
1692         /* Outer loop */
1693         for (std::vector<ucrec*>::const_iterator i = this->chans.begin(); i != this->chans.end(); i++)
1694         {
1695                 /* Fetch the channel from the user */
1696                 ucrec* user_channel = *i;
1697
1698                 if (user_channel->channel)
1699                 {
1700                         /* Eliminate the inner loop (which used to be ~equal in size to the outer loop)
1701                          * by replacing it with a map::find which *should* be more efficient
1702                          */
1703                         if (user_channel->channel->HasUser(other))
1704                                 return true;
1705                 }
1706         }
1707         return false;
1708 }
1709
1710 int userrec::CountChannels()
1711 {
1712         return ChannelCount;
1713 }
1714
1715 void userrec::ModChannelCount(int n)
1716 {
1717         ChannelCount += n;
1718 }
1719
1720 bool userrec::ChangeName(const char* gecos)
1721 {
1722         if (!strcmp(gecos, this->fullname))
1723                 return true;
1724
1725         if (IS_LOCAL(this))
1726         {
1727                 int MOD_RESULT = 0;
1728                 FOREACH_RESULT(I_OnChangeLocalUserGECOS,OnChangeLocalUserGECOS(this,gecos));
1729                 if (MOD_RESULT)
1730                         return false;
1731                 FOREACH_MOD(I_OnChangeName,OnChangeName(this,gecos));
1732         }
1733         strlcpy(this->fullname,gecos,MAXGECOS+1);
1734         return true;
1735 }
1736
1737 bool userrec::ChangeDisplayedHost(const char* host)
1738 {
1739         if (!strcmp(host, this->dhost))
1740                 return true;
1741
1742         if (IS_LOCAL(this))
1743         {
1744                 int MOD_RESULT = 0;
1745                 FOREACH_RESULT(I_OnChangeLocalUserHost,OnChangeLocalUserHost(this,host));
1746                 if (MOD_RESULT)
1747                         return false;
1748                 FOREACH_MOD(I_OnChangeHost,OnChangeHost(this,host));
1749         }
1750         if (this->ServerInstance->Config->CycleHosts)
1751                 this->WriteCommonExcept("%s","QUIT :Changing hosts");
1752
1753         strlcpy(this->dhost,host,63);
1754
1755         if (this->ServerInstance->Config->CycleHosts)
1756         {
1757                 for (std::vector<ucrec*>::const_iterator i = this->chans.begin(); i != this->chans.end(); i++)
1758                 {
1759                         if ((*i)->channel)
1760                         {
1761                                 (*i)->channel->WriteAllExceptSender(this, false, 0, "JOIN %s", (*i)->channel->name);
1762                                 std::string n = this->ServerInstance->Modes->ModeString(this, (*i)->channel);
1763                                 if (n.length() > 0)
1764                                         (*i)->channel->WriteAllExceptSender(this, true, 0, "MODE %s +%s", (*i)->channel->name, n.c_str());
1765                         }
1766                 }
1767         }
1768
1769         if (IS_LOCAL(this))
1770                 this->WriteServ("396 %s %s :is now your hidden host",this->nick,this->dhost);
1771
1772         return true;
1773 }
1774
1775 bool userrec::ChangeIdent(const char* newident)
1776 {
1777         if (!strcmp(newident, this->ident))
1778                 return true;
1779
1780         if (this->ServerInstance->Config->CycleHosts)
1781                 this->WriteCommonExcept("%s","QUIT :Changing ident");
1782
1783         strlcpy(this->ident, newident, IDENTMAX+2);
1784
1785         if (this->ServerInstance->Config->CycleHosts)
1786         {
1787                 for (std::vector<ucrec*>::const_iterator i = this->chans.begin(); i != this->chans.end(); i++)
1788                 {
1789                         if ((*i)->channel)
1790                         {
1791                                 (*i)->channel->WriteAllExceptSender(this, false, 0, "JOIN %s", (*i)->channel->name);
1792                                 std::string n = this->ServerInstance->Modes->ModeString(this, (*i)->channel);
1793                                 if (n.length() > 0)
1794                                         (*i)->channel->WriteAllExceptSender(this, true, 0, "MODE %s +%s", (*i)->channel->name, n.c_str());
1795                         }
1796                 }
1797         }
1798
1799         return true;
1800 }
1801
1802 void userrec::NoticeAll(char* text, ...)
1803 {
1804         char textbuffer[MAXBUF];
1805         char formatbuffer[MAXBUF];
1806         va_list argsPtr;
1807
1808         va_start(argsPtr, text);
1809         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1810         va_end(argsPtr);
1811
1812         snprintf(formatbuffer,MAXBUF,"NOTICE $* :%s",textbuffer);
1813
1814         for (std::vector<userrec*>::const_iterator i = ServerInstance->local_users.begin(); i != ServerInstance->local_users.end(); i++)
1815         {
1816                 userrec* t = *i;
1817                 t->WriteFrom(this, std::string(formatbuffer));
1818         }
1819 }
1820
1821
1822 std::string userrec::ChannelList(userrec* source)
1823 {
1824         try
1825         {
1826                 std::string list;
1827                 for (std::vector<ucrec*>::const_iterator i = this->chans.begin(); i != this->chans.end(); i++)
1828                 {
1829                         ucrec* rec = *i;
1830
1831                         if(rec->channel && rec->channel->name)
1832                         {
1833                                 /* If the target is the same as the sender, let them see all their channels.
1834                                  * If the channel is NOT private/secret OR the user shares a common channel
1835                                  * If the user is an oper, and the <options:operspywhois> option is set.
1836                                  */
1837                                 if ((source == this) || (*source->oper && ServerInstance->Config->OperSpyWhois) || (((!rec->channel->modes[CM_PRIVATE]) && (!rec->channel->modes[CM_SECRET])) || (rec->channel->HasUser(source))))
1838                                 {
1839                                         list.append(rec->channel->GetPrefixChar(this)).append(rec->channel->name).append(" ");
1840                                 }
1841                         }
1842                 }
1843                 return list;
1844         }
1845         catch (...)
1846         {
1847                 ServerInstance->Log(DEBUG,"Exception in userrec::ChannelList()");
1848                 return "";
1849         }
1850 }
1851
1852 void userrec::SplitChanList(userrec* dest, const std::string &cl)
1853 {
1854         std::string line;
1855         std::ostringstream prefix;
1856         std::string::size_type start, pos, length;
1857
1858         try
1859         {
1860                 prefix << ":" << ServerInstance->Config->ServerName << " 319 " << this->nick << " " << dest->nick << " :";
1861                 line = prefix.str();
1862
1863                 for (start = 0; (pos = cl.find(' ', start)) != std::string::npos; start = pos+1)
1864                 {
1865                         length = (pos == std::string::npos) ? cl.length() : pos;
1866
1867                         if (line.length() + length - start > 510)
1868                         {
1869                                 this->Write(line);
1870                                 line = prefix.str();
1871                         }
1872
1873                         if(pos == std::string::npos)
1874                         {
1875                                 line.append(cl.substr(start, length - start));
1876                                 break;
1877                         }
1878                         else
1879                         {
1880                                 line.append(cl.substr(start, length - start + 1));
1881                         }
1882                 }
1883
1884                 if (line.length())
1885                 {
1886                         this->Write(line);
1887                 }
1888         }
1889
1890         catch (...)
1891         {
1892                 ServerInstance->Log(DEBUG,"Exception in userrec::SplitChanList()");
1893         }
1894 }
1895
1896
1897 /* looks up a users password for their connection class (<ALLOW>/<DENY> tags)
1898  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1899  * then their ip will be taken as 'priority' anyway, so for example,
1900  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1901  */
1902 ConnectClass& userrec::GetClass()
1903 {
1904         for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1905         {
1906                 if ((match(this->GetIPString(),i->host.c_str(),true)) || (match(this->host,i->host.c_str())))
1907                         return *i;
1908         }
1909
1910         return *(ServerInstance->Config->Classes.begin());
1911 }
1912
1913 void userrec::PurgeEmptyChannels()
1914 {
1915         std::vector<chanrec*> to_delete;
1916
1917         // firstly decrement the count on each channel
1918         for (std::vector<ucrec*>::iterator f = this->chans.begin(); f != this->chans.end(); f++)
1919         {
1920                 ucrec* uc = *f;
1921                 if (uc->channel)
1922                 {
1923                         uc->channel->RemoveAllPrefixes(this);
1924                         if (uc->channel->DelUser(this) == 0)
1925                         {
1926                                 /* No users left in here, mark it for deletion */
1927                                 try
1928                                 {
1929                                         to_delete.push_back(uc->channel);
1930                                 }
1931                                 catch (...)
1932                                 {
1933                                         ServerInstance->Log(DEBUG,"Exception in userrec::PurgeEmptyChannels to_delete.push_back()");
1934                                 }
1935                                 uc->channel = NULL;
1936                         }
1937                 }
1938         }
1939
1940         for (std::vector<chanrec*>::iterator n = to_delete.begin(); n != to_delete.end(); n++)
1941         {
1942                 chanrec* thischan = *n;
1943                 chan_hash::iterator i2 = ServerInstance->chanlist.find(thischan->name);
1944                 if (i2 != ServerInstance->chanlist.end())
1945                 {
1946                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(i2->second));
1947                         DELETE(i2->second);
1948                         ServerInstance->chanlist.erase(i2);
1949                 }
1950         }
1951
1952         this->UnOper();
1953 }
1954
1955 void userrec::ShowMOTD()
1956 {
1957         if (!ServerInstance->Config->MOTD.size())
1958         {
1959                 this->WriteServ("422 %s :Message of the day file is missing.",this->nick);
1960                 return;
1961         }
1962         this->WriteServ("375 %s :%s message of the day", this->nick, ServerInstance->Config->ServerName);
1963
1964         for (unsigned int i = 0; i < ServerInstance->Config->MOTD.size(); i++)
1965                 this->WriteServ("372 %s :- %s",this->nick,ServerInstance->Config->MOTD[i].c_str());
1966
1967         this->WriteServ("376 %s :End of message of the day.", this->nick);
1968 }
1969
1970 void userrec::ShowRULES()
1971 {
1972         if (!ServerInstance->Config->RULES.size())
1973         {
1974                 this->WriteServ("NOTICE %s :Rules file is missing.",this->nick);
1975                 return;
1976         }
1977         this->WriteServ("NOTICE %s :%s rules",this->nick,ServerInstance->Config->ServerName);
1978
1979         for (unsigned int i = 0; i < ServerInstance->Config->RULES.size(); i++)
1980                 this->WriteServ("NOTICE %s :%s",this->nick,ServerInstance->Config->RULES[i].c_str());
1981
1982         this->WriteServ("NOTICE %s :End of %s rules.",this->nick,ServerInstance->Config->ServerName);
1983 }
1984
1985 void userrec::HandleEvent(EventType et)
1986 {
1987         /* WARNING: May delete this user! */
1988         try
1989         {
1990                 ServerInstance->ProcessUser(this);
1991         }
1992         catch (...)
1993         {
1994                 ServerInstance->Log(DEBUG,"Exception in userrec::HandleEvent intercepted");
1995         }
1996 }
1997