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