src/users.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2007 InspIRCd Development Team
   6  * See: http://www.inspircd.org/wiki/index.php/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *            the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 #include "configreader.h"
  15 #include "channels.h"
  16 #include "users.h"
  17 #include "inspircd.h"
  18 #include <stdarg.h>
  19 #include "socketengine.h"
  20 #include "wildcard.h"
  21 #include "xline.h"
  22 #include "commands/cmd_whowas.h"
  23
  24 static unsigned long already_sent[MAX_DESCRIPTORS] = {0};
  25
  26 /* XXX: Used for speeding up WriteCommon operations */
  27 unsigned long uniq_id = 0;
  28
  29 bool InitTypes(ServerConfig* conf, const char* tag)
  30 {
  31         if (conf->opertypes.size())
  32         {
  33                 for (opertype_t::iterator n = conf->opertypes.begin(); n != conf->opertypes.end(); n++)
  34                 {
  35                         if (n->second)
  36                                 delete[] n->second;
  37                 }
  38         }
  39
  40         conf->opertypes.clear();
  41         return true;
  42 }
  43
  44 bool InitClasses(ServerConfig* conf, const char* tag)
  45 {
  46         if (conf->operclass.size())
  47         {
  48                 for (operclass_t::iterator n = conf->operclass.begin(); n != conf->operclass.end(); n++)
  49                 {
  50                         if (n->second)
  51                                 delete[] n->second;
  52                 }
  53         }
  54
  55         conf->operclass.clear();
  56         return true;
  57 }
  58
  59 bool DoType(ServerConfig* conf, const char* tag, char** entries, ValueList &values, int* types)
  60 {
  61         const char* TypeName = values[0].GetString();
  62         const char* Classes = values[1].GetString();
  63
  64         conf->opertypes[TypeName] = strdup(Classes);
  65         return true;
  66 }
  67
  68 bool DoClass(ServerConfig* conf, const char* tag, char** entries, ValueList &values, int* types)
  69 {
  70         const char* ClassName = values[0].GetString();
  71         const char* CommandList = values[1].GetString();
  72
  73         conf->operclass[ClassName] = strdup(CommandList);
  74         return true;
  75 }
  76
  77 bool DoneClassesAndTypes(ServerConfig* conf, const char* tag)
  78 {
  79         return true;
  80 }
  81
  82 std::string userrec::ProcessNoticeMasks(const char *sm)
  83 {
  84         bool adding = true, oldadding = false;
  85         const char *c = sm;
  86         std::string output;
  87
  88         while (c && *c)
  89         {
  90                 switch (*c)
  91                 {
  92                         case '+':
  93                                 adding = true;
  94                         break;
  95                         case '-':
  96                                 adding = false;
  97                         break;
  98                         case '*':
  99                                 for (unsigned char d = 'A'; d <= 'z'; d++)
 100                                 {
 101                                         if (ServerInstance->SNO->IsEnabled(d))
 102                                         {
 103                                                 if ((!IsNoticeMaskSet(d) && adding) || (IsNoticeMaskSet(d) && !adding))
 104                                                 {
 105                                                         if ((oldadding != adding) || (!output.length()))
 106                                                                 output += (adding ? '+' : '-');
 107
 108                                                         this->SetNoticeMask(d, adding);
 109
 110                                                         output += d;
 111                                                 }
 112                                         }
 113                                         oldadding = adding;
 114                                 }
 115                         break;
 116                         default:
 117                                 if ((*c >= 'A') && (*c <= 'z') && (ServerInstance->SNO->IsEnabled(*c)))
 118                                 {
 119                                         if ((!IsNoticeMaskSet(*c) && adding) || (IsNoticeMaskSet(*c) && !adding))
 120                                         {
 121                                                 if ((oldadding != adding) || (!output.length()))
 122                                                         output += (adding ? '+' : '-');
 123
 124                                                 this->SetNoticeMask(*c, adding);
 125
 126                                                 output += *c;
 127                                         }
 128                                 }
 129                                 oldadding = adding;
 130                         break;
 131                 }
 132
 133                 *c++;
 134         }
 135
 136         return output;
 137 }
 138
 139 void userrec::StartDNSLookup()
 140 {
 141         try
 142         {
 143                 bool cached;
 144                 const char* ip = this->GetIPString();
 145
 146                 /* Special case for 4in6 (Have i mentioned i HATE 4in6?) */
 147                 if (!strncmp(ip, "0::ffff:", 8))
 148                         res_reverse = new UserResolver(this->ServerInstance, this, ip + 8, DNS_QUERY_PTR4, cached);
 149                 else
 150                         res_reverse = new UserResolver(this->ServerInstance, this, ip, this->GetProtocolFamily() == AF_INET ? DNS_QUERY_PTR4 : DNS_QUERY_PTR6, cached);
 151
 152                 this->ServerInstance->AddResolver(res_reverse, cached);
 153         }
 154         catch (CoreException& e)
 155         {
 156                 ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
 157         }
 158 }
 159
 160 UserResolver::UserResolver(InspIRCd* Instance, userrec* user, std::string to_resolve, QueryType qt, bool &cache) :
 161         Resolver(Instance, to_resolve, qt, cache), bound_user(user)
 162 {
 163         this->fwd = (qt == DNS_QUERY_A || qt == DNS_QUERY_AAAA);
 164         this->bound_fd = user->GetFd();
 165 }
 166
 167 void UserResolver::OnLookupComplete(const std::string &result, unsigned int ttl, bool cached)
 168 {
 169         if ((!this->fwd) && (ServerInstance->SE->GetRef(this->bound_fd) == this->bound_user))
 170         {
 171                 this->bound_user->stored_host = result;
 172                 try
 173                 {
 174                         /* Check we didnt time out */
 175                         if (this->bound_user->registered != REG_ALL)
 176                         {
 177                                 bool cached;
 178 #ifdef IPV6
 179                                 if (this->bound_user->GetProtocolFamily() == AF_INET6)
 180                                 {
 181                                         /* IPV6 forward lookup (with possibility of 4in6) */
 182                                         const char* ip = this->bound_user->GetIPString();
 183                                         bound_user->res_forward = new UserResolver(this->ServerInstance, this->bound_user, result, (!strncmp(ip, "0::ffff:", 8) ? DNS_QUERY_A : DNS_QUERY_AAAA), cached);
 184                                 }
 185                                 else
 186                                 {
 187                                         /* IPV4 lookup (mixed protocol mode) */
 188                                         bound_user->res_forward = new UserResolver(this->ServerInstance, this->bound_user, result, DNS_QUERY_A, cached);
 189                                 }
 190 #else
 191                                 /* IPV4 lookup (ipv4 only mode) */
 192                                 bound_user->res_forward = new UserResolver(this->ServerInstance, this->bound_user, result, DNS_QUERY_A, cached);
 193 #endif
 194                                 this->ServerInstance->AddResolver(bound_user->res_forward, cached);
 195                         }
 196                 }
 197                 catch (CoreException& e)
 198                 {
 199                         ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
 200                 }
 201         }
 202         else if ((this->fwd) && (ServerInstance->SE->GetRef(this->bound_fd) == this->bound_user))
 203         {
 204                 /* Both lookups completed */
 205                 std::string result2 = "0::ffff:";
 206                 result2.append(result);
 207                 if (this->bound_user->GetIPString() == result || this->bound_user->GetIPString() == result2)
 208                 {
 209                         std::string hostname = this->bound_user->stored_host;
 210                         if (hostname.length() < 65)
 211                         {
 212                                 /* Check we didnt time out */
 213                                 if ((this->bound_user->registered != REG_ALL) && (!this->bound_user->dns_done))
 214                                 {
 215                                         /* Hostnames starting with : are not a good thing (tm) */
 216                                         if (*(hostname.c_str()) == ':')
 217                                                 hostname = "0" + hostname;
 218
 219                                         this->bound_user->WriteServ("NOTICE Auth :*** Found your hostname (%s)%s", hostname.c_str(), (cached ? " -- cached" : ""));
 220                                         this->bound_user->dns_done = true;
 221                                         strlcpy(this->bound_user->dhost, hostname.c_str(),64);
 222                                         strlcpy(this->bound_user->host, hostname.c_str(),64);
 223                                         /* Invalidate cache */
 224                                         this->bound_user->InvalidateCache();
 225                                 }
 226                         }
 227                         else
 228                         {
 229                                 if (!this->bound_user->dns_done)
 230                                 {
 231                                         this->bound_user->WriteServ("NOTICE Auth :*** Your hostname is longer than the maximum of 64 characters, using your IP address (%s) instead.", this->bound_user->GetIPString());
 232                                         this->bound_user->dns_done = true;
 233                                 }
 234                         }
 235                 }
 236                 else
 237                 {
 238                         if (!this->bound_user->dns_done)
 239                         {
 240                                 this->bound_user->WriteServ("NOTICE Auth :*** Your hostname does not match up with your IP address. Sorry, using your IP address (%s) instead.", this->bound_user->GetIPString());
 241                                 this->bound_user->dns_done = true;
 242                         }
 243                 }
 244         }
 245 }
 246
 247 void UserResolver::OnError(ResolverError e, const std::string &errormessage)
 248 {
 249         if (ServerInstance->SE->GetRef(this->bound_fd) == this->bound_user)
 250         {
 251                 /* Since dns timeout is implemented outside of the resolver, this was a race condition that could result in this message being sent *after*
 252                  * the user was fully connected. This check fixes that issue  - Special */
 253                 if (!this->bound_user->dns_done)
 254                 {
 255                         /* Error message here */
 256                         this->bound_user->WriteServ("NOTICE Auth :*** Could not resolve your hostname: %s; using your IP address (%s) instead.", errormessage.c_str(), this->bound_user->GetIPString());
 257                         this->bound_user->dns_done = true;
 258                 }
 259         }
 260 }
 261
 262
 263 bool userrec::IsNoticeMaskSet(unsigned char sm)
 264 {
 265         return (snomasks[sm-65]);
 266 }
 267
 268 void userrec::SetNoticeMask(unsigned char sm, bool value)
 269 {
 270         snomasks[sm-65] = value;
 271 }
 272
 273 const char* userrec::FormatNoticeMasks()
 274 {
 275         static char data[MAXBUF];
 276         int offset = 0;
 277
 278         for (int n = 0; n < 64; n++)
 279         {
 280                 if (snomasks[n])
 281                         data[offset++] = n+65;
 282         }
 283
 284         data[offset] = 0;
 285         return data;
 286 }
 287
 288
 289
 290 bool userrec::IsModeSet(unsigned char m)
 291 {
 292         return (modes[m-65]);
 293 }
 294
 295 void userrec::SetMode(unsigned char m, bool value)
 296 {
 297         modes[m-65] = value;
 298 }
 299
 300 const char* userrec::FormatModes()
 301 {
 302         static char data[MAXBUF];
 303         int offset = 0;
 304         for (int n = 0; n < 64; n++)
 305         {
 306                 if (modes[n])
 307                         data[offset++] = n+65;
 308         }
 309         data[offset] = 0;
 310         return data;
 311 }
 312
 313 void userrec::DecrementModes()
 314 {
 315         for (int n = 0; n < 64; n++)
 316         {
 317                 if (modes[n])
 318                 {
 319                         ModeHandler* mh = ServerInstance->Modes->FindMode(n+65, MODETYPE_USER);
 320                         if (mh)
 321                                 mh->ChangeCount(-1);
 322                 }
 323         }
 324 }
 325
 326 userrec::userrec(InspIRCd* Instance) : ServerInstance(Instance)
 327 {
 328         // the PROPER way to do it, AVOID bzero at *ALL* costs
 329         *password = *nick = *ident = *host = *dhost = *fullname = *awaymsg = *oper = 0;
 330         server = (char*)Instance->FindServerNamePtr(Instance->Config->ServerName);
 331         reset_due = ServerInstance->Time();
 332         age = ServerInstance->Time(true);
 333         lines_in = lastping = signon = idle_lastmsg = nping = registered = 0;
 334         ChannelCount = timeout = flood = bytes_in = bytes_out = cmds_in = cmds_out = 0;
 335         muted = exempt = haspassed = dns_done = false;
 336         fd = -1;
 337         recvq = "";
 338         sendq = "";
 339         WriteError = "";
 340         res_forward = res_reverse = NULL;
 341         Visibility = NULL;
 342         ip = NULL;
 343         chans.clear();
 344         invites.clear();
 345         memset(modes,0,sizeof(modes));
 346         memset(snomasks,0,sizeof(snomasks));
 347         /* Invalidate cache */
 348         operquit = cached_fullhost = cached_hostip = cached_makehost = cached_fullrealhost = NULL;
 349 }
 350
 351 userrec::~userrec()
 352 {
 353         this->InvalidateCache();
 354         this->DecrementModes();
 355         if (operquit)
 356                 free(operquit);
 357         if (ip)
 358         {
 359                 clonemap::iterator x = ServerInstance->local_clones.find(this->GetIPString());
 360                 if (x != ServerInstance->local_clones.end())
 361                 {
 362                         x->second--;
 363                         if (!x->second)
 364                         {
 365                                 ServerInstance->local_clones.erase(x);
 366                         }
 367                 }
 368
 369                 clonemap::iterator y = ServerInstance->global_clones.find(this->GetIPString());
 370                 if (y != ServerInstance->global_clones.end())
 371                 {
 372                         y->second--;
 373                         if (!y->second)
 374                         {
 375                                 ServerInstance->global_clones.erase(y);
 376                         }
 377                 }
 378
 379                 if (this->GetProtocolFamily() == AF_INET)
 380                 {
 381                         delete (sockaddr_in*)ip;
 382                 }
 383 #ifdef SUPPORT_IP6LINKS
 384                 else
 385                 {
 386                         delete (sockaddr_in6*)ip;
 387                 }
 388 #endif
 389         }
 390 }
 391
 392 char* userrec::MakeHost()
 393 {
 394         if (this->cached_makehost)
 395                 return this->cached_makehost;
 396
 397         char nhost[MAXBUF];
 398         /* This is much faster than snprintf */
 399         char* t = nhost;
 400         for(char* n = ident; *n; n++)
 401                 *t++ = *n;
 402         *t++ = '@';
 403         for(char* n = host; *n; n++)
 404                 *t++ = *n;
 405         *t = 0;
 406
 407         this->cached_makehost = strdup(nhost);
 408
 409         return this->cached_makehost;
 410 }
 411
 412 char* userrec::MakeHostIP()
 413 {
 414         if (this->cached_hostip)
 415                 return this->cached_hostip;
 416
 417         char ihost[MAXBUF];
 418         /* This is much faster than snprintf */
 419         char* t = ihost;
 420         for(char* n = ident; *n; n++)
 421                 *t++ = *n;
 422         *t++ = '@';
 423         for(const char* n = this->GetIPString(); *n; n++)
 424                 *t++ = *n;
 425         *t = 0;
 426
 427         this->cached_hostip = strdup(ihost);
 428
 429         return this->cached_hostip;
 430 }
 431
 432 void userrec::CloseSocket()
 433 {
 434         shutdown(this->fd,2);
 435         close(this->fd);
 436 }
 437
 438 char* userrec::GetFullHost()
 439 {
 440         if (this->cached_fullhost)
 441                 return this->cached_fullhost;
 442
 443         char result[MAXBUF];
 444         char* t = result;
 445         for(char* n = nick; *n; n++)
 446                 *t++ = *n;
 447         *t++ = '!';
 448         for(char* n = ident; *n; n++)
 449                 *t++ = *n;
 450         *t++ = '@';
 451         for(char* n = dhost; *n; n++)
 452                 *t++ = *n;
 453         *t = 0;
 454
 455         this->cached_fullhost = strdup(result);
 456
 457         return this->cached_fullhost;
 458 }
 459
 460 char* userrec::MakeWildHost()
 461 {
 462         static char nresult[MAXBUF];
 463         char* t = nresult;
 464         *t++ = '*';     *t++ = '!';
 465         *t++ = '*';     *t++ = '@';
 466         for(char* n = dhost; *n; n++)
 467                 *t++ = *n;
 468         *t = 0;
 469         return nresult;
 470 }
 471
 472 int userrec::ReadData(void* buffer, size_t size)
 473 {
 474         if (IS_LOCAL(this))
 475         {
 476                 return read(this->fd, buffer, size);
 477         }
 478         else
 479                 return 0;
 480 }
 481
 482
 483 char* userrec::GetFullRealHost()
 484 {
 485         if (this->cached_fullrealhost)
 486                 return this->cached_fullrealhost;
 487
 488         char fresult[MAXBUF];
 489         char* t = fresult;
 490         for(char* n = nick; *n; n++)
 491                 *t++ = *n;
 492         *t++ = '!';
 493         for(char* n = ident; *n; n++)
 494                 *t++ = *n;
 495         *t++ = '@';
 496         for(char* n = host; *n; n++)
 497                 *t++ = *n;
 498         *t = 0;
 499
 500         this->cached_fullrealhost = strdup(fresult);
 501
 502         return this->cached_fullrealhost;
 503 }
 504
 505 bool userrec::IsInvited(const irc::string &channel)
 506 {
 507         for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 508         {
 509                 if (channel == *i)
 510                 {
 511                         return true;
 512                 }
 513         }
 514         return false;
 515 }
 516
 517 InvitedList* userrec::GetInviteList()
 518 {
 519         return &invites;
 520 }
 521
 522 void userrec::InviteTo(const irc::string &channel)
 523 {
 524         invites.push_back(channel);
 525 }
 526
 527 void userrec::RemoveInvite(const irc::string &channel)
 528 {
 529         for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 530         {
 531                 if (channel == *i)
 532                 {
 533                         invites.erase(i);
 534                         return;
 535                 }
 536         }
 537 }
 538
 539 bool userrec::HasPermission(const std::string &command)
 540 {
 541         char* mycmd;
 542         char* savept;
 543         char* savept2;
 544
 545         /*
 546          * users on remote servers can completely bypass all permissions based checks.
 547          * This prevents desyncs when one server has different type/class tags to another.
 548          * That having been said, this does open things up to the possibility of source changes
 549          * allowing remote kills, etc - but if they have access to the src, they most likely have
 550          * access to the conf - so it's an end to a means either way.
 551          */
 552         if (!IS_LOCAL(this))
 553                 return true;
 554
 555         // are they even an oper at all?
 556         if (IS_OPER(this))
 557         {
 558                 opertype_t::iterator iter_opertype = ServerInstance->Config->opertypes.find(this->oper);
 559                 if (iter_opertype != ServerInstance->Config->opertypes.end())
 560                 {
 561                         char* Classes = strdup(iter_opertype->second);
 562                         char* myclass = strtok_r(Classes," ",&savept);
 563                         while (myclass)
 564                         {
 565                                 operclass_t::iterator iter_operclass = ServerInstance->Config->operclass.find(myclass);
 566                                 if (iter_operclass != ServerInstance->Config->operclass.end())
 567                                 {
 568                                         char* CommandList = strdup(iter_operclass->second);
 569                                         mycmd = strtok_r(CommandList," ",&savept2);
 570                                         while (mycmd)
 571                                         {
 572                                                 if ((!strcasecmp(mycmd,command.c_str())) || (*mycmd == '*'))
 573                                                 {
 574                                                         free(Classes);
 575                                                         free(CommandList);
 576                                                         return true;
 577                                                 }
 578                                                 mycmd = strtok_r(NULL," ",&savept2);
 579                                         }
 580                                         free(CommandList);
 581                                 }
 582                                 myclass = strtok_r(NULL," ",&savept);
 583                         }
 584                         free(Classes);
 585                 }
 586         }
 587         return false;
 588 }
 589
 590 /** NOTE: We cannot pass a const reference to this method.
 591  * The string is changed by the workings of the method,
 592  * so that if we pass const ref, we end up copying it to
 593  * something we can change anyway. Makes sense to just let
 594  * the compiler do that copy for us.
 595  */
 596 bool userrec::AddBuffer(std::string a)
 597 {
 598         try
 599         {
 600                 std::string::size_type i = a.rfind('\r');
 601
 602                 while (i != std::string::npos)
 603                 {
 604                         a.erase(i, 1);
 605                         i = a.rfind('\r');
 606                 }
 607
 608                 if (a.length())
 609                         recvq.append(a);
 610
 611                 if (recvq.length() > (unsigned)this->recvqmax)
 612                 {
 613                         this->SetWriteError("RecvQ exceeded");
 614                         ServerInstance->WriteOpers("*** User %s RecvQ of %d exceeds connect class maximum of %d",this->nick,recvq.length(),this->recvqmax);
 615                         return false;
 616                 }
 617
 618                 return true;
 619         }
 620
 621         catch (...)
 622         {
 623                 ServerInstance->Log(DEBUG,"Exception in userrec::AddBuffer()");
 624                 return false;
 625         }
 626 }
 627
 628 bool userrec::BufferIsReady()
 629 {
 630         return (recvq.find('\n') != std::string::npos);
 631 }
 632
 633 void userrec::ClearBuffer()
 634 {
 635         recvq = "";
 636 }
 637
 638 std::string userrec::GetBuffer()
 639 {
 640         try
 641         {
 642                 if (!recvq.length())
 643                         return "";
 644
 645                 /* Strip any leading \r or \n off the string.
 646                  * Usually there are only one or two of these,
 647                  * so its is computationally cheap to do.
 648                  */
 649                 while ((*recvq.begin() == '\r') || (*recvq.begin() == '\n'))
 650                         recvq.erase(recvq.begin());
 651
 652                 for (std::string::iterator x = recvq.begin(); x != recvq.end(); x++)
 653                 {
 654                         /* Find the first complete line, return it as the
 655                          * result, and leave the recvq as whats left
 656                          */
 657                         if (*x == '\n')
 658                         {
 659                                 std::string ret = std::string(recvq.begin(), x);
 660                                 recvq.erase(recvq.begin(), x + 1);
 661                                 return ret;
 662                         }
 663                 }
 664                 return "";
 665         }
 666
 667         catch (...)
 668         {
 669                 ServerInstance->Log(DEBUG,"Exception in userrec::GetBuffer()");
 670                 return "";
 671         }
 672 }
 673
 674 void userrec::AddWriteBuf(const std::string &data)
 675 {
 676         if (*this->GetWriteError())
 677                 return;
 678
 679         if (sendq.length() + data.length() > (unsigned)this->sendqmax)
 680         {
 681                 /*
 682                  * Fix by brain - Set the error text BEFORE calling writeopers, because
 683                  * if we dont it'll recursively  call here over and over again trying
 684                  * to repeatedly add the text to the sendq!
 685                  */
 686                 this->SetWriteError("SendQ exceeded");
 687                 ServerInstance->WriteOpers("*** User %s SendQ of %d exceeds connect class maximum of %d",this->nick,sendq.length() + data.length(),this->sendqmax);
 688                 return;
 689         }
 690
 691         try
 692         {
 693                 if (data.length() > 512)
 694                         sendq.append(data.substr(0,510)).append("\r\n");
 695                 else
 696                         sendq.append(data);
 697         }
 698         catch (...)
 699         {
 700                 this->SetWriteError("SendQ exceeded");
 701                 ServerInstance->WriteOpers("*** User %s SendQ got an exception",this->nick);
 702         }
 703 }
 704
 705 // send AS MUCH OF THE USERS SENDQ as we are able to (might not be all of it)
 706 void userrec::FlushWriteBuf()
 707 {
 708         try
 709         {
 710                 if ((this->fd == FD_MAGIC_NUMBER) || (*this->GetWriteError()))
 711                 {
 712                         sendq = "";
 713                 }
 714                 if ((sendq.length()) && (this->fd != FD_MAGIC_NUMBER))
 715                 {
 716                         int old_sendq_length = sendq.length();
 717                         int n_sent = write(this->fd, this->sendq.data(), this->sendq.length());
 718                         if (n_sent == -1)
 719                         {
 720                                 if (errno == EAGAIN)
 721                                 {
 722                                         /* The socket buffer is full. This isnt fatal,
 723                                          * try again later.
 724                                          */
 725                                         this->ServerInstance->SE->WantWrite(this);
 726                                 }
 727                                 else
 728                                 {
 729                                         /* Fatal error, set write error and bail
 730                                          */
 731                                         this->SetWriteError(strerror(errno));
 732                                         return;
 733                                 }
 734                         }
 735                         else
 736                         {
 737                                 /* advance the queue */
 738                                 if (n_sent)
 739                                         this->sendq = this->sendq.substr(n_sent);
 740                                 /* update the user's stats counters */
 741                                 this->bytes_out += n_sent;
 742                                 this->cmds_out++;
 743                                 if (n_sent != old_sendq_length)
 744                                         this->ServerInstance->SE->WantWrite(this);
 745                         }
 746                 }
 747         }
 748
 749         catch (...)
 750         {
 751                 ServerInstance->Log(DEBUG,"Exception in userrec::FlushWriteBuf()");
 752         }
 753
 754         if (this->sendq.empty())
 755         {
 756                 FOREACH_MOD(I_OnBufferFlushed,OnBufferFlushed(this));
 757         }
 758 }
 759
 760 void userrec::SetWriteError(const std::string &error)
 761 {
 762         try
 763         {
 764                 // don't try to set the error twice, its already set take the first string.
 765                 if (this->WriteError.empty())
 766                         this->WriteError = error;
 767         }
 768
 769         catch (...)
 770         {
 771                 ServerInstance->Log(DEBUG,"Exception in userrec::SetWriteError()");
 772         }
 773 }
 774
 775 const char* userrec::GetWriteError()
 776 {
 777         return this->WriteError.c_str();
 778 }
 779
 780 void userrec::Oper(const std::string &opertype)
 781 {
 782         try
 783         {
 784                 this->modes[UM_OPERATOR] = 1;
 785                 this->WriteServ("MODE %s :+o", this->nick);
 786                 FOREACH_MOD(I_OnOper, OnOper(this, opertype));
 787                 ServerInstance->Log(DEFAULT,"OPER: %s!%s@%s opered as type: %s", this->nick, this->ident, this->host, opertype.c_str());
 788                 strlcpy(this->oper, opertype.c_str(), NICKMAX - 1);
 789                 ServerInstance->all_opers.push_back(this);
 790                 FOREACH_MOD(I_OnPostOper,OnPostOper(this, opertype));
 791         }
 792
 793         catch (...)
 794         {
 795                 ServerInstance->Log(DEBUG,"Exception in userrec::Oper()");
 796         }
 797 }
 798
 799 void userrec::UnOper()
 800 {
 801         try
 802         {
 803                 if (IS_OPER(this))
 804                 {
 805                         // unset their oper type (what IS_OPER checks), and remove +o
 806                         *this->oper = 0;
 807                         this->modes[UM_OPERATOR] = 0;
 808
 809                         // remove them from the opers list.
 810                         for (std::vector<userrec*>::iterator a = ServerInstance->all_opers.begin(); a < ServerInstance->all_opers.end(); a++)
 811                         {
 812                                 if (*a == this)
 813                                 {
 814                                         ServerInstance->all_opers.erase(a);
 815                                         return;
 816                                 }
 817                         }
 818                 }
 819         }
 820
 821         catch (...)
 822         {
 823                 ServerInstance->Log(DEBUG,"Exception in userrec::UnOper()");
 824         }
 825 }
 826
 827 void userrec::QuitUser(InspIRCd* Instance, userrec *user, const std::string &quitreason, const char* operreason)
 828 {
 829         user->muted = true;
 830         Instance->GlobalCulls.AddItem(user, quitreason.c_str(), operreason);
 831 }
 832
 833 /* adds or updates an entry in the whowas list */
 834 void userrec::AddToWhoWas()
 835 {
 836         command_t* whowas_command = ServerInstance->Parser->GetHandler("WHOWAS");
 837         if (whowas_command)
 838         {
 839                 std::deque<classbase*> params;
 840                 params.push_back(this);
 841                 whowas_command->HandleInternal(WHOWAS_ADD, params);
 842         }
 843 }
 844
 845 /* add a client connection to the sockets list */
 846 void userrec::AddClient(InspIRCd* Instance, int socket, int port, bool iscached, int socketfamily, sockaddr* ip)
 847 {
 848         std::string tempnick = ConvToStr(socket) + "-unknown";
 849         user_hash::iterator iter = Instance->clientlist->find(tempnick);
 850         char ipaddr[MAXBUF];
 851 #ifdef IPV6
 852         if (socketfamily == AF_INET6)
 853                 inet_ntop(AF_INET6, &((const sockaddr_in6*)ip)->sin6_addr, ipaddr, sizeof(ipaddr));
 854         else
 855                 inet_ntop(AF_INET, &((const sockaddr_in*)ip)->sin_addr, ipaddr, sizeof(ipaddr));
 856 #else
 857         inet_ntop(AF_INET, &((const sockaddr_in*)ip)->sin_addr, ipaddr, sizeof(ipaddr));
 858 #endif
 859         userrec* New;
 860         int j = 0;
 861
 862         Instance->unregistered_count++;
 863
 864         /*
 865          * fix by brain.
 866          * as these nicknames are 'RFC impossible', we can be sure nobody is going to be
 867          * using one as a registered connection. As they are per fd, we can also safely assume
 868          * that we wont have collisions. Therefore, if the nick exists in the list, its only
 869          * used by a dead socket, erase the iterator so that the new client may reclaim it.
 870          * this was probably the cause of 'server ignores me when i hammer it with reconnects'
 871          * issue in earlier alphas/betas
 872          */
 873         if (iter != Instance->clientlist->end())
 874         {
 875                 userrec* goner = iter->second;
 876                 DELETE(goner);
 877                 Instance->clientlist->erase(iter);
 878         }
 879
 880         New = new userrec(Instance);
 881         (*(Instance->clientlist))[tempnick] = New;
 882         New->fd = socket;
 883         strlcpy(New->nick,tempnick.c_str(),NICKMAX-1);
 884
 885         New->server = Instance->FindServerNamePtr(Instance->Config->ServerName);
 886         /* We don't need range checking here, we KNOW 'unknown\0' will fit into the ident field. */
 887         strcpy(New->ident, "unknown");
 888
 889         New->registered = REG_NONE;
 890         New->signon = Instance->Time() + Instance->Config->dns_timeout;
 891         New->lastping = 1;
 892
 893         New->SetSockAddr(socketfamily, ipaddr, port);
 894
 895         /* Smarter than your average bear^H^H^H^Hset of strlcpys. */
 896         for (const char* temp = New->GetIPString(); *temp && j < 64; temp++, j++)
 897                 New->dhost[j] = New->host[j] = *temp;
 898         New->dhost[j] = New->host[j] = 0;
 899
 900         Instance->AddLocalClone(New);
 901         Instance->AddGlobalClone(New);
 902
 903         ConnectClass* i = New->GetClass();
 904
 905         if ((!i) || (i->GetType() == CC_DENY))
 906         {
 907                 userrec::QuitUser(Instance, New,"Unauthorised connection");
 908                 return;
 909         }
 910
 911         New->pingmax = i->GetPingTime();
 912         New->nping = Instance->Time() + i->GetPingTime() + Instance->Config->dns_timeout;
 913         New->timeout = Instance->Time() + i->GetRegTimeout();
 914         New->flood = i->GetFlood();
 915         New->threshold = i->GetThreshold();
 916         New->sendqmax = i->GetSendqMax();
 917         New->recvqmax = i->GetRecvqMax();
 918
 919         Instance->local_users.push_back(New);
 920
 921         if ((Instance->local_users.size() > Instance->Config->SoftLimit) || (Instance->local_users.size() >= MAXCLIENTS))
 922         {
 923                 Instance->WriteOpers("*** Warning: softlimit value has been reached: %d clients", Instance->Config->SoftLimit);
 924                 userrec::QuitUser(Instance, New,"No more connections allowed");
 925                 return;
 926         }
 927
 928         /*
 929          * XXX -
 930          * this is done as a safety check to keep the file descriptors within range of fd_ref_table.
 931          * its a pretty big but for the moment valid assumption:
 932          * file descriptors are handed out starting at 0, and are recycled as theyre freed.
 933          * therefore if there is ever an fd over 65535, 65536 clients must be connected to the
 934          * irc server at once (or the irc server otherwise initiating this many connections, files etc)
 935          * which for the time being is a physical impossibility (even the largest networks dont have more
 936          * than about 10,000 users on ONE server!)
 937          */
 938         if ((unsigned int)socket >= MAX_DESCRIPTORS)
 939         {
 940                 userrec::QuitUser(Instance, New, "Server is full");
 941                 return;
 942         }
 943
 944         New->exempt = (Instance->XLines->matches_exception(New) != NULL);
 945         if (!New->exempt)
 946         {
 947                 ZLine* r = Instance->XLines->matches_zline(ipaddr);
 948                 if (r)
 949                 {
 950                         char reason[MAXBUF];
 951                         snprintf(reason,MAXBUF,"Z-Lined: %s",r->reason);
 952                         userrec::QuitUser(Instance, New, reason);
 953                         return;
 954                 }
 955         }
 956
 957         if (socket > -1)
 958         {
 959                 if (!Instance->SE->AddFd(New))
 960                 {
 961                         userrec::QuitUser(Instance, New, "Internal error handling connection");
 962                         return;
 963                 }
 964         }
 965
 966         /* NOTE: even if dns lookups are *off*, we still need to display this.
 967          * BOPM and other stuff requires it.
 968          */
 969         New->WriteServ("NOTICE Auth :*** Looking up your hostname...");
 970 }
 971
 972 unsigned long userrec::GlobalCloneCount()
 973 {
 974         clonemap::iterator x = ServerInstance->global_clones.find(this->GetIPString());
 975         if (x != ServerInstance->global_clones.end())
 976                 return x->second;
 977         else
 978                 return 0;
 979 }
 980
 981 unsigned long userrec::LocalCloneCount()
 982 {
 983         clonemap::iterator x = ServerInstance->local_clones.find(this->GetIPString());
 984         if (x != ServerInstance->local_clones.end())
 985                 return x->second;
 986         else
 987                 return 0;
 988 }
 989
 990 void userrec::FullConnect()
 991 {
 992         ServerInstance->stats->statsConnects++;
 993         this->idle_lastmsg = ServerInstance->Time();
 994
 995         ConnectClass* a = this->GetClass();
 996
 997         if ((!a) || (a->GetType() == CC_DENY))
 998         {
 999                 this->muted = true;
1000                 ServerInstance->GlobalCulls.AddItem(this,"Unauthorised connection");
1001                 return;
1002         }
1003
1004         if ((!a->GetPass().empty()) && (!this->haspassed))
1005         {
1006                 this->muted = true;
1007                 ServerInstance->GlobalCulls.AddItem(this,"Invalid password");
1008                 return;
1009         }
1010
1011         if ((a->GetMaxLocal()) && (this->LocalCloneCount() > a->GetMaxLocal()))
1012         {
1013                 this->muted = true;
1014                 ServerInstance->GlobalCulls.AddItem(this, "No more connections allowed from your host via this connect class (local)");
1015                 ServerInstance->WriteOpers("*** WARNING: maximum LOCAL connections (%ld) exceeded for IP %s", a->GetMaxLocal(), this->GetIPString());
1016                 return;
1017         }
1018         else if ((a->GetMaxGlobal()) && (this->GlobalCloneCount() > a->GetMaxGlobal()))
1019         {
1020                 this->muted = true;
1021                 ServerInstance->GlobalCulls.AddItem(this, "No more connections allowed from your host via this connect class (global)");
1022                 ServerInstance->WriteOpers("*** WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s",a->GetMaxGlobal(), this->GetIPString());
1023                 return;
1024         }
1025
1026         if (!this->exempt)
1027         {
1028                 GLine* r = ServerInstance->XLines->matches_gline(this);
1029
1030                 if (r)
1031                 {
1032                         this->muted = true;
1033                         char reason[MAXBUF];
1034                         snprintf(reason,MAXBUF,"G-Lined: %s",r->reason);
1035                         ServerInstance->GlobalCulls.AddItem(this, reason);
1036                         return;
1037                 }
1038
1039                 KLine* n = ServerInstance->XLines->matches_kline(this);
1040
1041                 if (n)
1042                 {
1043                         this->muted = true;
1044                         char reason[MAXBUF];
1045                         snprintf(reason,MAXBUF,"K-Lined: %s",n->reason);
1046                         ServerInstance->GlobalCulls.AddItem(this, reason);
1047                         return;
1048                 }
1049
1050         }
1051
1052         this->WriteServ("NOTICE Auth :Welcome to \002%s\002!",ServerInstance->Config->Network);
1053         this->WriteServ("001 %s :Welcome to the %s IRC Network %s!%s@%s",this->nick, ServerInstance->Config->Network, this->nick, this->ident, this->host);
1054         this->WriteServ("002 %s :Your host is %s, running version %s",this->nick,ServerInstance->Config->ServerName,VERSION);
1055         this->WriteServ("003 %s :This server was created %s %s", this->nick, __TIME__, __DATE__);
1056         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());
1057
1058         ServerInstance->Config->Send005(this);
1059
1060         this->ShowMOTD();
1061
1062         /* Now registered */
1063         if (ServerInstance->unregistered_count)
1064                 ServerInstance->unregistered_count--;
1065
1066         /* Trigger LUSERS output, give modules a chance too */
1067         int MOD_RESULT = 0;
1068         FOREACH_RESULT(I_OnPreCommand, OnPreCommand("LUSERS", NULL, 0, this, true, "LUSERS"));
1069         if (!MOD_RESULT)
1070                 ServerInstance->CallCommandHandler("LUSERS", NULL, 0, this);
1071
1072         /*
1073          * fix 3 by brain, move registered = 7 below these so that spurious modes and host
1074          * changes dont go out onto the network and produce 'fake direction'.
1075          */
1076         FOREACH_MOD(I_OnUserConnect,OnUserConnect(this));
1077
1078         this->registered = REG_ALL;
1079
1080         FOREACH_MOD(I_OnPostConnect,OnPostConnect(this));
1081
1082         ServerInstance->SNO->WriteToSnoMask('c',"Client connecting on port %d: %s!%s@%s [%s] [%s]", this->GetPort(), this->nick, this->ident, this->host, this->GetIPString(), this->fullname);
1083 }
1084
1085 /** userrec::UpdateNick()
1086  * re-allocates a nick in the user_hash after they change nicknames,
1087  * returns a pointer to the new user as it may have moved
1088  */
1089 userrec* userrec::UpdateNickHash(const char* New)
1090 {
1091         try
1092         {
1093                 //user_hash::iterator newnick;
1094                 user_hash::iterator oldnick = ServerInstance->clientlist->find(this->nick);
1095
1096                 if (!strcasecmp(this->nick,New))
1097                         return oldnick->second;
1098
1099                 if (oldnick == ServerInstance->clientlist->end())
1100                         return NULL; /* doesnt exist */
1101
1102                 userrec* olduser = oldnick->second;
1103                 (*(ServerInstance->clientlist))[New] = olduser;
1104                 ServerInstance->clientlist->erase(oldnick);
1105                 return olduser;
1106         }
1107
1108         catch (...)
1109         {
1110                 ServerInstance->Log(DEBUG,"Exception in userrec::UpdateNickHash()");
1111                 return NULL;
1112         }
1113 }
1114
1115 void userrec::InvalidateCache()
1116 {
1117         /* Invalidate cache */
1118         if (cached_fullhost)
1119                 free(cached_fullhost);
1120         if (cached_hostip)
1121                 free(cached_hostip);
1122         if (cached_makehost)
1123                 free(cached_makehost);
1124         if (cached_fullrealhost)
1125                 free(cached_fullrealhost);
1126         cached_fullhost = cached_hostip = cached_makehost = cached_fullrealhost = NULL;
1127 }
1128
1129 bool userrec::ForceNickChange(const char* newnick)
1130 {
1131         try
1132         {
1133                 int MOD_RESULT = 0;
1134
1135                 this->InvalidateCache();
1136
1137                 FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(this, newnick));
1138
1139                 if (MOD_RESULT)
1140                 {
1141                         ServerInstance->stats->statsCollisions++;
1142                         return false;
1143                 }
1144
1145                 if (ServerInstance->XLines->matches_qline(newnick))
1146                 {
1147                         ServerInstance->stats->statsCollisions++;
1148                         return false;
1149                 }
1150
1151                 if (this->registered == REG_ALL)
1152                 {
1153                         const char* pars[1];
1154                         pars[0] = newnick;
1155                         std::string cmd = "NICK";
1156                         return (ServerInstance->Parser->CallHandler(cmd, pars, 1, this) == CMD_SUCCESS);
1157                 }
1158                 return false;
1159         }
1160
1161         catch (...)
1162         {
1163                 ServerInstance->Log(DEBUG,"Exception in userrec::ForceNickChange()");
1164                 return false;
1165         }
1166 }
1167
1168 void userrec::SetSockAddr(int protocol_family, const char* ip, int port)
1169 {
1170         switch (protocol_family)
1171         {
1172 #ifdef SUPPORT_IP6LINKS
1173                 case AF_INET6:
1174                 {
1175                         sockaddr_in6* sin = new sockaddr_in6;
1176                         sin->sin6_family = AF_INET6;
1177                         sin->sin6_port = port;
1178                         inet_pton(AF_INET6, ip, &sin->sin6_addr);
1179                         this->ip = (sockaddr*)sin;
1180                 }
1181                 break;
1182 #endif
1183                 case AF_INET:
1184                 {
1185                         sockaddr_in* sin = new sockaddr_in;
1186                         sin->sin_family = AF_INET;
1187                         sin->sin_port = port;
1188                         inet_pton(AF_INET, ip, &sin->sin_addr);
1189                         this->ip = (sockaddr*)sin;
1190                 }
1191                 break;
1192                 default:
1193                         ServerInstance->Log(DEBUG,"Ut oh, I dont know protocol %d to be set on '%s'!", protocol_family, this->nick);
1194                 break;
1195         }
1196 }
1197
1198 int userrec::GetPort()
1199 {
1200         if (this->ip == NULL)
1201                 return 0;
1202
1203         switch (this->GetProtocolFamily())
1204         {
1205 #ifdef SUPPORT_IP6LINKS
1206                 case AF_INET6:
1207                 {
1208                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1209                         return sin->sin6_port;
1210                 }
1211                 break;
1212 #endif
1213                 case AF_INET:
1214                 {
1215                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1216                         return sin->sin_port;
1217                 }
1218                 break;
1219                 default:
1220                 break;
1221         }
1222         return 0;
1223 }
1224
1225 int userrec::GetProtocolFamily()
1226 {
1227         if (this->ip == NULL)
1228                 return 0;
1229
1230         sockaddr_in* sin = (sockaddr_in*)this->ip;
1231         return sin->sin_family;
1232 }
1233
1234 const char* userrec::GetIPString()
1235 {
1236         static char buf[1024];
1237
1238         if (this->ip == NULL)
1239                 return "";
1240
1241         switch (this->GetProtocolFamily())
1242         {
1243 #ifdef SUPPORT_IP6LINKS
1244                 case AF_INET6:
1245                 {
1246                         static char temp[1024];
1247
1248                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1249                         inet_ntop(sin->sin6_family, &sin->sin6_addr, buf, sizeof(buf));
1250                         /* IP addresses starting with a : on irc are a Bad Thing (tm) */
1251                         if (*buf == ':')
1252                         {
1253                                 strlcpy(&temp[1], buf, sizeof(temp) - 1);
1254                                 *temp = '0';
1255                                 return temp;
1256                         }
1257                         return buf;
1258                 }
1259                 break;
1260 #endif
1261                 case AF_INET:
1262                 {
1263                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1264                         inet_ntop(sin->sin_family, &sin->sin_addr, buf, sizeof(buf));
1265                         return buf;
1266                 }
1267                 break;
1268                 default:
1269                 break;
1270         }
1271         return "";
1272 }
1273
1274 const char* userrec::GetIPString(char* buf)
1275 {
1276         if (this->ip == NULL)
1277         {
1278                 *buf = 0;
1279                 return buf;
1280         }
1281
1282         switch (this->GetProtocolFamily())
1283         {
1284 #ifdef SUPPORT_IP6LINKS
1285                 case AF_INET6:
1286                 {
1287                         static char temp[1024];
1288
1289                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1290                         inet_ntop(sin->sin6_family, &sin->sin6_addr, buf, sizeof(buf));
1291                         /* IP addresses starting with a : on irc are a Bad Thing (tm) */
1292                         if (*buf == ':')
1293                         {
1294                                 strlcpy(&temp[1], buf, sizeof(temp) - 1);
1295                                 *temp = '0';
1296                                 strlcpy(buf, temp, sizeof(temp));
1297                         }
1298                         return buf;
1299                 }
1300                 break;
1301 #endif
1302                 case AF_INET:
1303                 {
1304                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1305                         inet_ntop(sin->sin_family, &sin->sin_addr, buf, sizeof(buf));
1306                         return buf;
1307                 }
1308                 break;
1309
1310                 default:
1311                 break;
1312         }
1313         return "";
1314 }
1315
1316 /** NOTE: We cannot pass a const reference to this method.
1317  * The string is changed by the workings of the method,
1318  * so that if we pass const ref, we end up copying it to
1319  * something we can change anyway. Makes sense to just let
1320  * the compiler do that copy for us.
1321  */
1322 void userrec::Write(std::string text)
1323 {
1324         if ((this->fd < 0) || (this->fd > MAX_DESCRIPTORS))
1325                 return;
1326
1327         try
1328         {
1329                 /* ServerInstance->Log(DEBUG,"<- %s", text.c_str());
1330                  * WARNING: The above debug line is VERY loud, do NOT
1331                  * enable it till we have a good way of filtering it
1332                  * out of the logs (e.g. 1.2 would be good).
1333                  */
1334                 text.append("\r\n");
1335         }
1336         catch (...)
1337         {
1338                 ServerInstance->Log(DEBUG,"Exception in userrec::Write() std::string::append");
1339                 return;
1340         }
1341
1342         if (ServerInstance->Config->GetIOHook(this->GetPort()))
1343         {
1344                 try
1345                 {
1346                         ServerInstance->Config->GetIOHook(this->GetPort())->OnRawSocketWrite(this->fd, text.data(), text.length());
1347                 }
1348                 catch (CoreException& modexcept)
1349                 {
1350                         ServerInstance->Log(DEBUG, "%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
1351                 }
1352         }
1353         else
1354         {
1355                 this->AddWriteBuf(text);
1356         }
1357         ServerInstance->stats->statsSent += text.length();
1358         this->ServerInstance->SE->WantWrite(this);
1359 }
1360
1361 /** Write()
1362  */
1363 void userrec::Write(const char *text, ...)
1364 {
1365         va_list argsPtr;
1366         char textbuffer[MAXBUF];
1367
1368         va_start(argsPtr, text);
1369         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1370         va_end(argsPtr);
1371
1372         this->Write(std::string(textbuffer));
1373 }
1374
1375 void userrec::WriteServ(const std::string& text)
1376 {
1377         char textbuffer[MAXBUF];
1378
1379         snprintf(textbuffer,MAXBUF,":%s %s",ServerInstance->Config->ServerName,text.c_str());
1380         this->Write(std::string(textbuffer));
1381 }
1382
1383 /** WriteServ()
1384  *  Same as Write(), except `text' is prefixed with `:server.name '.
1385  */
1386 void userrec::WriteServ(const char* text, ...)
1387 {
1388         va_list argsPtr;
1389         char textbuffer[MAXBUF];
1390
1391         va_start(argsPtr, text);
1392         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1393         va_end(argsPtr);
1394
1395         this->WriteServ(std::string(textbuffer));
1396 }
1397
1398
1399 void userrec::WriteFrom(userrec *user, const std::string &text)
1400 {
1401         char tb[MAXBUF];
1402
1403         snprintf(tb,MAXBUF,":%s %s",user->GetFullHost(),text.c_str());
1404
1405         this->Write(std::string(tb));
1406 }
1407
1408
1409 /* write text from an originating user to originating user */
1410
1411 void userrec::WriteFrom(userrec *user, const char* text, ...)
1412 {
1413         va_list argsPtr;
1414         char textbuffer[MAXBUF];
1415
1416         va_start(argsPtr, text);
1417         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1418         va_end(argsPtr);
1419
1420         this->WriteFrom(user, std::string(textbuffer));
1421 }
1422
1423
1424 /* write text to an destination user from a source user (e.g. user privmsg) */
1425
1426 void userrec::WriteTo(userrec *dest, const char *data, ...)
1427 {
1428         char textbuffer[MAXBUF];
1429         va_list argsPtr;
1430
1431         va_start(argsPtr, data);
1432         vsnprintf(textbuffer, MAXBUF, data, argsPtr);
1433         va_end(argsPtr);
1434
1435         this->WriteTo(dest, std::string(textbuffer));
1436 }
1437
1438 void userrec::WriteTo(userrec *dest, const std::string &data)
1439 {
1440         dest->WriteFrom(this, data);
1441 }
1442
1443
1444 void userrec::WriteCommon(const char* text, ...)
1445 {
1446         char textbuffer[MAXBUF];
1447         va_list argsPtr;
1448
1449         if (this->registered != REG_ALL)
1450                 return;
1451
1452         va_start(argsPtr, text);
1453         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1454         va_end(argsPtr);
1455
1456         this->WriteCommon(std::string(textbuffer));
1457 }
1458
1459 void userrec::WriteCommon(const std::string &text)
1460 {
1461         try
1462         {
1463                 bool sent_to_at_least_one = false;
1464                 char tb[MAXBUF];
1465
1466                 if (this->registered != REG_ALL)
1467                         return;
1468
1469                 uniq_id++;
1470
1471                 /* We dont want to be doing this n times, just once */
1472                 snprintf(tb,MAXBUF,":%s %s",this->GetFullHost(),text.c_str());
1473                 std::string out = tb;
1474
1475                 for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1476                 {
1477                         CUList* ulist = v->first->GetUsers();
1478                         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1479                         {
1480                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1481                                 {
1482                                         already_sent[i->first->fd] = uniq_id;
1483                                         i->first->Write(out);
1484                                         sent_to_at_least_one = true;
1485                                 }
1486                         }
1487                 }
1488
1489                 /*
1490                  * if the user was not in any channels, no users will receive the text. Make sure the user
1491                  * receives their OWN message for WriteCommon
1492                  */
1493                 if (!sent_to_at_least_one)
1494                 {
1495                         this->Write(std::string(tb));
1496                 }
1497         }
1498
1499         catch (...)
1500         {
1501                 ServerInstance->Log(DEBUG,"Exception in userrec::WriteCommon()");
1502         }
1503 }
1504
1505
1506 /* write a formatted string to all users who share at least one common
1507  * channel, NOT including the source user e.g. for use in QUIT
1508  */
1509
1510 void userrec::WriteCommonExcept(const char* text, ...)
1511 {
1512         char textbuffer[MAXBUF];
1513         va_list argsPtr;
1514
1515         va_start(argsPtr, text);
1516         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1517         va_end(argsPtr);
1518
1519         this->WriteCommonExcept(std::string(textbuffer));
1520 }
1521
1522 void userrec::WriteCommonQuit(const std::string &normal_text, const std::string &oper_text)
1523 {
1524         char tb1[MAXBUF];
1525         char tb2[MAXBUF];
1526
1527         if (this->registered != REG_ALL)
1528                 return;
1529
1530         uniq_id++;
1531         snprintf(tb1,MAXBUF,":%s QUIT :%s",this->GetFullHost(),normal_text.c_str());
1532         snprintf(tb2,MAXBUF,":%s QUIT :%s",this->GetFullHost(),oper_text.c_str());
1533         std::string out1 = tb1;
1534         std::string out2 = tb2;
1535
1536         for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1537         {
1538                 CUList *ulist = v->first->GetUsers();
1539                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1540                 {
1541                         if (this != i->first)
1542                         {
1543                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1544                                 {
1545                                         already_sent[i->first->fd] = uniq_id;
1546                                         i->first->Write(IS_OPER(i->first) ? out2 : out1);
1547                                 }
1548                         }
1549                 }
1550         }
1551 }
1552
1553 void userrec::WriteCommonExcept(const std::string &text)
1554 {
1555         char tb1[MAXBUF];
1556         std::string out1;
1557
1558         if (this->registered != REG_ALL)
1559                 return;
1560
1561         uniq_id++;
1562         snprintf(tb1,MAXBUF,":%s %s",this->GetFullHost(),text.c_str());
1563         out1 = tb1;
1564
1565         for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1566         {
1567                 CUList *ulist = v->first->GetUsers();
1568                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1569                 {
1570                         if (this != i->first)
1571                         {
1572                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1573                                 {
1574                                         already_sent[i->first->fd] = uniq_id;
1575                                         i->first->Write(out1);
1576                                 }
1577                         }
1578                 }
1579         }
1580
1581 }
1582
1583 void userrec::WriteWallOps(const std::string &text)
1584 {
1585         if (!IS_OPER(this) && IS_LOCAL(this))
1586                 return;
1587
1588         std::string wallop = "WALLOPS :";
1589
1590         try
1591         {
1592                 wallop.append(text);
1593         }
1594         catch (...)
1595         {
1596                 ServerInstance->Log(DEBUG,"Exception in userrec::Write() std::string::append");
1597                 return;
1598         }
1599
1600         for (std::vector<userrec*>::const_iterator i = ServerInstance->local_users.begin(); i != ServerInstance->local_users.end(); i++)
1601         {
1602                 userrec* t = *i;
1603                 if ((IS_LOCAL(t)) && (t->modes[UM_WALLOPS]))
1604                         this->WriteTo(t,wallop);
1605         }
1606 }
1607
1608 void userrec::WriteWallOps(const char* text, ...)
1609 {
1610         char textbuffer[MAXBUF];
1611         va_list argsPtr;
1612
1613         va_start(argsPtr, text);
1614         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1615         va_end(argsPtr);
1616
1617         this->WriteWallOps(std::string(textbuffer));
1618 }
1619
1620 /* return 0 or 1 depending if users u and u2 share one or more common channels
1621  * (used by QUIT, NICK etc which arent channel specific notices)
1622  *
1623  * The old algorithm in 1.0 for this was relatively inefficient, iterating over
1624  * the first users channels then the second users channels within the outer loop,
1625  * therefore it was a maximum of x*y iterations (upon returning 0 and checking
1626  * all possible iterations). However this new function instead checks against the
1627  * channel's userlist in the inner loop which is a std::map<userrec*,userrec*>
1628  * and saves us time as we already know what pointer value we are after.
1629  * Don't quote me on the maths as i am not a mathematician or computer scientist,
1630  * but i believe this algorithm is now x+(log y) maximum iterations instead.
1631  */
1632 bool userrec::SharesChannelWith(userrec *other)
1633 {
1634         if ((!other) || (this->registered != REG_ALL) || (other->registered != REG_ALL))
1635                 return false;
1636
1637         /* Outer loop */
1638         for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1639         {
1640                 /* Eliminate the inner loop (which used to be ~equal in size to the outer loop)
1641                  * by replacing it with a map::find which *should* be more efficient
1642                  */
1643                 if (i->first->HasUser(other))
1644                         return true;
1645         }
1646         return false;
1647 }
1648
1649 bool userrec::ChangeName(const char* gecos)
1650 {
1651         if (!strcmp(gecos, this->fullname))
1652                 return true;
1653
1654         if (IS_LOCAL(this))
1655         {
1656                 int MOD_RESULT = 0;
1657                 FOREACH_RESULT(I_OnChangeLocalUserGECOS,OnChangeLocalUserGECOS(this,gecos));
1658                 if (MOD_RESULT)
1659                         return false;
1660                 FOREACH_MOD(I_OnChangeName,OnChangeName(this,gecos));
1661         }
1662         strlcpy(this->fullname,gecos,MAXGECOS+1);
1663
1664         return true;
1665 }
1666
1667 bool userrec::ChangeDisplayedHost(const char* host)
1668 {
1669         if (!strcmp(host, this->dhost))
1670                 return true;
1671
1672         if (IS_LOCAL(this))
1673         {
1674                 int MOD_RESULT = 0;
1675                 FOREACH_RESULT(I_OnChangeLocalUserHost,OnChangeLocalUserHost(this,host));
1676                 if (MOD_RESULT)
1677                         return false;
1678                 FOREACH_MOD(I_OnChangeHost,OnChangeHost(this,host));
1679         }
1680         if (this->ServerInstance->Config->CycleHosts)
1681                 this->WriteCommonExcept("QUIT :Changing hosts");
1682
1683         /* Fix by Om: userrec::dhost is 65 long, this was truncating some long hosts */
1684         strlcpy(this->dhost,host,64);
1685
1686         this->InvalidateCache();
1687
1688         if (this->ServerInstance->Config->CycleHosts)
1689         {
1690                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1691                 {
1692                         i->first->WriteAllExceptSender(this, false, 0, "JOIN %s", i->first->name);
1693                         std::string n = this->ServerInstance->Modes->ModeString(this, i->first);
1694                         if (n.length() > 0)
1695                                 i->first->WriteAllExceptSender(this, true, 0, "MODE %s +%s", i->first->name, n.c_str());
1696                 }
1697         }
1698
1699         if (IS_LOCAL(this))
1700                 this->WriteServ("396 %s %s :is now your displayed host",this->nick,this->dhost);
1701
1702         return true;
1703 }
1704
1705 bool userrec::ChangeIdent(const char* newident)
1706 {
1707         if (!strcmp(newident, this->ident))
1708                 return true;
1709
1710         if (this->ServerInstance->Config->CycleHosts)
1711                 this->WriteCommonExcept("%s","QUIT :Changing ident");
1712
1713         strlcpy(this->ident, newident, IDENTMAX+2);
1714
1715         this->InvalidateCache();
1716
1717         if (this->ServerInstance->Config->CycleHosts)
1718         {
1719                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1720                 {
1721                         i->first->WriteAllExceptSender(this, false, 0, "JOIN %s", i->first->name);
1722                         std::string n = this->ServerInstance->Modes->ModeString(this, i->first);
1723                         if (n.length() > 0)
1724                                 i->first->WriteAllExceptSender(this, true, 0, "MODE %s +%s", i->first->name, n.c_str());
1725                 }
1726         }
1727
1728         return true;
1729 }
1730
1731 void userrec::SendAll(const char* command, char* text, ...)
1732 {
1733         char textbuffer[MAXBUF];
1734         char formatbuffer[MAXBUF];
1735         va_list argsPtr;
1736
1737         va_start(argsPtr, text);
1738         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1739         va_end(argsPtr);
1740
1741         snprintf(formatbuffer,MAXBUF,":%s %s $* :%s", this->GetFullHost(), command, textbuffer);
1742         std::string fmt = formatbuffer;
1743
1744         for (std::vector<userrec*>::const_iterator i = ServerInstance->local_users.begin(); i != ServerInstance->local_users.end(); i++)
1745         {
1746                 (*i)->Write(fmt);
1747         }
1748 }
1749
1750
1751 std::string userrec::ChannelList(userrec* source)
1752 {
1753         try
1754         {
1755                 std::string list;
1756                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1757                 {
1758                         /* If the target is the same as the sender, let them see all their channels.
1759                          * If the channel is NOT private/secret OR the user shares a common channel
1760                          * If the user is an oper, and the <options:operspywhois> option is set.
1761                          */
1762                         if ((source == this) || (IS_OPER(source) && ServerInstance->Config->OperSpyWhois) || (((!i->first->modes[CM_PRIVATE]) && (!i->first->modes[CM_SECRET])) || (i->first->HasUser(source))))
1763                         {
1764                                 list.append(i->first->GetPrefixChar(this)).append(i->first->name).append(" ");
1765                         }
1766                 }
1767                 return list;
1768         }
1769         catch (...)
1770         {
1771                 ServerInstance->Log(DEBUG,"Exception in userrec::ChannelList()");
1772                 return "";
1773         }
1774 }
1775
1776 void userrec::SplitChanList(userrec* dest, const std::string &cl)
1777 {
1778         std::string line;
1779         std::ostringstream prefix;
1780         std::string::size_type start, pos, length;
1781
1782         try
1783         {
1784                 prefix << this->nick << " " << dest->nick << " :";
1785                 line = prefix.str();
1786                 int namelen = strlen(ServerInstance->Config->ServerName) + 6;
1787
1788                 for (start = 0; (pos = cl.find(' ', start)) != std::string::npos; start = pos+1)
1789                 {
1790                         length = (pos == std::string::npos) ? cl.length() : pos;
1791
1792                         if (line.length() + namelen + length - start > 510)
1793                         {
1794                                 ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1795                                 line = prefix.str();
1796                         }
1797
1798                         if(pos == std::string::npos)
1799                         {
1800                                 line.append(cl.substr(start, length - start));
1801                                 break;
1802                         }
1803                         else
1804                         {
1805                                 line.append(cl.substr(start, length - start + 1));
1806                         }
1807                 }
1808
1809                 if (line.length())
1810                 {
1811                         ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1812                 }
1813         }
1814
1815         catch (...)
1816         {
1817                 ServerInstance->Log(DEBUG,"Exception in userrec::SplitChanList()");
1818         }
1819 }
1820
1821
1822 /* looks up a users password for their connection class (<ALLOW>/<DENY> tags)
1823  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1824  * then their ip will be taken as 'priority' anyway, so for example,
1825  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1826  */
1827 ConnectClass* userrec::GetClass()
1828 {
1829         for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1830         {
1831                 if (((match(this->GetIPString(),i->GetHost().c_str(),true)) || (match(this->host,i->GetHost().c_str()))))
1832                 {
1833                         if (i->GetPort())
1834                         {
1835                                 if (this->GetPort() == i->GetPort())
1836                                         return &(*i);
1837                                 else
1838                                         continue;
1839                         }
1840                         else
1841                                 return &(*i);
1842                 }
1843         }
1844         return NULL;
1845 }
1846
1847 void userrec::PurgeEmptyChannels()
1848 {
1849         std::vector<chanrec*> to_delete;
1850
1851         // firstly decrement the count on each channel
1852         for (UCListIter f = this->chans.begin(); f != this->chans.end(); f++)
1853         {
1854                 f->first->RemoveAllPrefixes(this);
1855                 if (f->first->DelUser(this) == 0)
1856                 {
1857                         /* No users left in here, mark it for deletion */
1858                         try
1859                         {
1860                                 to_delete.push_back(f->first);
1861                         }
1862                         catch (...)
1863                         {
1864                                 ServerInstance->Log(DEBUG,"Exception in userrec::PurgeEmptyChannels to_delete.push_back()");
1865                         }
1866                 }
1867         }
1868
1869         for (std::vector<chanrec*>::iterator n = to_delete.begin(); n != to_delete.end(); n++)
1870         {
1871                 chanrec* thischan = *n;
1872                 chan_hash::iterator i2 = ServerInstance->chanlist->find(thischan->name);
1873                 if (i2 != ServerInstance->chanlist->end())
1874                 {
1875                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(i2->second));
1876                         DELETE(i2->second);
1877                         ServerInstance->chanlist->erase(i2);
1878                         this->chans.erase(*n);
1879                 }
1880         }
1881
1882         this->UnOper();
1883 }
1884
1885 void userrec::ShowMOTD()
1886 {
1887         if (!ServerInstance->Config->MOTD.size())
1888         {
1889                 this->WriteServ("422 %s :Message of the day file is missing.",this->nick);
1890                 return;
1891         }
1892         this->WriteServ("375 %s :%s message of the day", this->nick, ServerInstance->Config->ServerName);
1893
1894         for (file_cache::iterator i = ServerInstance->Config->MOTD.begin(); i != ServerInstance->Config->MOTD.end(); i++)
1895                 this->WriteServ("372 %s :- %s",this->nick,i->c_str());
1896
1897         this->WriteServ("376 %s :End of message of the day.", this->nick);
1898 }
1899
1900 void userrec::ShowRULES()
1901 {
1902         if (!ServerInstance->Config->RULES.size())
1903         {
1904                 this->WriteServ("NOTICE %s :Rules file is missing.",this->nick);
1905                 return;
1906         }
1907         this->WriteServ("NOTICE %s :%s rules",this->nick,ServerInstance->Config->ServerName);
1908
1909         for (file_cache::iterator i = ServerInstance->Config->RULES.begin(); i != ServerInstance->Config->RULES.end(); i++)
1910                 this->WriteServ("NOTICE %s :%s",this->nick,i->c_str());
1911
1912         this->WriteServ("NOTICE %s :End of %s rules.",this->nick,ServerInstance->Config->ServerName);
1913 }
1914
1915 void userrec::HandleEvent(EventType et, int errornum)
1916 {
1917         /* WARNING: May delete this user! */
1918         int thisfd = this->GetFd();
1919
1920         try
1921         {
1922                 switch (et)
1923                 {
1924                         case EVENT_READ:
1925                                 ServerInstance->ProcessUser(this);
1926                         break;
1927                         case EVENT_WRITE:
1928                                 this->FlushWriteBuf();
1929                         break;
1930                         case EVENT_ERROR:
1931                                 /** This should be safe, but dont DARE do anything after it -- Brain */
1932                                 this->SetWriteError(errornum ? strerror(errornum) : "EOF from client");
1933                         break;
1934                 }
1935         }
1936         catch (...)
1937         {
1938                 ServerInstance->Log(DEBUG,"Exception in userrec::HandleEvent intercepted");
1939         }
1940
1941         /* If the user has raised an error whilst being processed, quit them now we're safe to */
1942         if ((ServerInstance->SE->GetRef(thisfd) == this))
1943         {
1944                 if (!WriteError.empty())
1945                 {
1946                         userrec::QuitUser(ServerInstance, this, GetWriteError());
1947                 }
1948         }
1949 }
1950
1951 void userrec::SetOperQuit(const std::string &oquit)
1952 {
1953         if (operquit)
1954                 return;
1955
1956         operquit = strdup(oquit.c_str());
1957 }
1958
1959 const char* userrec::GetOperQuit()
1960 {
1961         return operquit ? operquit : "";
1962 }
1963
1964 VisData::VisData()
1965 {
1966 }
1967
1968 VisData::~VisData()
1969 {
1970 }
1971
1972 bool VisData::VisibleTo(userrec* user)
1973 {
1974         return true;
1975 }
1976