src/users.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2007 InspIRCd Development Team
   6  * See: http://www.inspircd.org/wiki/index.php/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *            the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 #include "inspircd.h"
  15 #include "configreader.h"
  16 #include "channels.h"
  17 #include "users.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                                         /* IPV4 lookup (mixed protocol mode) */
 187 #endif
 188                                 /* IPV4 lookup (ipv4 only mode) */
 189                                 bound_user->res_forward = new UserResolver(this->ServerInstance, this->bound_user, result, DNS_QUERY_A, cached);
 190                                 this->ServerInstance->AddResolver(bound_user->res_forward, cached);
 191                         }
 192                 }
 193                 catch (CoreException& e)
 194                 {
 195                         ServerInstance->Log(DEBUG,"Error in resolver: %s",e.GetReason());
 196                 }
 197         }
 198         else if ((this->fwd) && (ServerInstance->SE->GetRef(this->bound_fd) == this->bound_user))
 199         {
 200                 /* Both lookups completed */
 201                 std::string result2 = "0::ffff:";
 202                 result2.append(result);
 203                 if (this->bound_user->GetIPString() == result || this->bound_user->GetIPString() == result2)
 204                 {
 205                         std::string hostname = this->bound_user->stored_host;
 206                         if (hostname.length() < 65)
 207                         {
 208                                 /* Check we didnt time out */
 209                                 if ((this->bound_user->registered != REG_ALL) && (!this->bound_user->dns_done))
 210                                 {
 211                                         /* Hostnames starting with : are not a good thing (tm) */
 212                                         if (*(hostname.c_str()) == ':')
 213                                                 hostname = "0" + hostname;
 214
 215                                         this->bound_user->WriteServ("NOTICE Auth :*** Found your hostname (%s)%s", hostname.c_str(), (cached ? " -- cached" : ""));
 216                                         this->bound_user->dns_done = true;
 217                                         strlcpy(this->bound_user->dhost, hostname.c_str(),64);
 218                                         strlcpy(this->bound_user->host, hostname.c_str(),64);
 219                                         /* Invalidate cache */
 220                                         this->bound_user->InvalidateCache();
 221                                 }
 222                         }
 223                         else
 224                         {
 225                                 if (!this->bound_user->dns_done)
 226                                 {
 227                                         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());
 228                                         this->bound_user->dns_done = true;
 229                                 }
 230                         }
 231                 }
 232                 else
 233                 {
 234                         if (!this->bound_user->dns_done)
 235                         {
 236                                 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());
 237                                 this->bound_user->dns_done = true;
 238                         }
 239                 }
 240         }
 241 }
 242
 243 void UserResolver::OnError(ResolverError e, const std::string &errormessage)
 244 {
 245         if (ServerInstance->SE->GetRef(this->bound_fd) == this->bound_user)
 246         {
 247                 /* Since dns timeout is implemented outside of the resolver, this was a race condition that could result in this message being sent *after*
 248                  * the user was fully connected. This check fixes that issue  - Special */
 249                 if (!this->bound_user->dns_done)
 250                 {
 251                         /* Error message here */
 252                         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());
 253                         this->bound_user->dns_done = true;
 254                 }
 255         }
 256 }
 257
 258
 259 bool userrec::IsNoticeMaskSet(unsigned char sm)
 260 {
 261         return (snomasks[sm-65]);
 262 }
 263
 264 void userrec::SetNoticeMask(unsigned char sm, bool value)
 265 {
 266         snomasks[sm-65] = value;
 267 }
 268
 269 const char* userrec::FormatNoticeMasks()
 270 {
 271         static char data[MAXBUF];
 272         int offset = 0;
 273
 274         for (int n = 0; n < 64; n++)
 275         {
 276                 if (snomasks[n])
 277                         data[offset++] = n+65;
 278         }
 279
 280         data[offset] = 0;
 281         return data;
 282 }
 283
 284
 285
 286 bool userrec::IsModeSet(unsigned char m)
 287 {
 288         return (modes[m-65]);
 289 }
 290
 291 void userrec::SetMode(unsigned char m, bool value)
 292 {
 293         modes[m-65] = value;
 294 }
 295
 296 const char* userrec::FormatModes()
 297 {
 298         static char data[MAXBUF];
 299         int offset = 0;
 300         for (int n = 0; n < 64; n++)
 301         {
 302                 if (modes[n])
 303                         data[offset++] = n+65;
 304         }
 305         data[offset] = 0;
 306         return data;
 307 }
 308
 309 void userrec::DecrementModes()
 310 {
 311         for (int n = 0; n < 64; n++)
 312         {
 313                 if (modes[n])
 314                 {
 315                         ModeHandler* mh = ServerInstance->Modes->FindMode(n+65, MODETYPE_USER);
 316                         if (mh)
 317                                 mh->ChangeCount(-1);
 318                 }
 319         }
 320 }
 321
 322 userrec::userrec(InspIRCd* Instance) : ServerInstance(Instance)
 323 {
 324         // the PROPER way to do it, AVOID bzero at *ALL* costs
 325         *password = *nick = *ident = *host = *dhost = *fullname = *awaymsg = *oper = 0;
 326         server = (char*)Instance->FindServerNamePtr(Instance->Config->ServerName);
 327         reset_due = ServerInstance->Time();
 328         age = ServerInstance->Time(true);
 329         lines_in = lastping = signon = idle_lastmsg = nping = registered = 0;
 330         ChannelCount = timeout = flood = bytes_in = bytes_out = cmds_in = cmds_out = 0;
 331         muted = exempt = haspassed = dns_done = false;
 332         fd = -1;
 333         recvq.clear();
 334         sendq.clear();
 335         WriteError.clear();
 336         res_forward = res_reverse = NULL;
 337         Visibility = NULL;
 338         ip = NULL;
 339         chans.clear();
 340         invites.clear();
 341         memset(modes,0,sizeof(modes));
 342         memset(snomasks,0,sizeof(snomasks));
 343         /* Invalidate cache */
 344         operquit = cached_fullhost = cached_hostip = cached_makehost = cached_fullrealhost = NULL;
 345 }
 346
 347 userrec::~userrec()
 348 {
 349         this->InvalidateCache();
 350         this->DecrementModes();
 351         if (operquit)
 352                 free(operquit);
 353         if (ip)
 354         {
 355                 clonemap::iterator x = ServerInstance->local_clones.find(this->GetIPString());
 356                 if (x != ServerInstance->local_clones.end())
 357                 {
 358                         x->second--;
 359                         if (!x->second)
 360                         {
 361                                 ServerInstance->local_clones.erase(x);
 362                         }
 363                 }
 364
 365                 clonemap::iterator y = ServerInstance->global_clones.find(this->GetIPString());
 366                 if (y != ServerInstance->global_clones.end())
 367                 {
 368                         y->second--;
 369                         if (!y->second)
 370                         {
 371                                 ServerInstance->global_clones.erase(y);
 372                         }
 373                 }
 374
 375                 if (this->GetProtocolFamily() == AF_INET)
 376                 {
 377                         delete (sockaddr_in*)ip;
 378                 }
 379 #ifdef SUPPORT_IP6LINKS
 380                 else
 381                 {
 382                         delete (sockaddr_in6*)ip;
 383                 }
 384 #endif
 385         }
 386 }
 387
 388 char* userrec::MakeHost()
 389 {
 390         if (this->cached_makehost)
 391                 return this->cached_makehost;
 392
 393         char nhost[MAXBUF];
 394         /* This is much faster than snprintf */
 395         char* t = nhost;
 396         for(char* n = ident; *n; n++)
 397                 *t++ = *n;
 398         *t++ = '@';
 399         for(char* n = host; *n; n++)
 400                 *t++ = *n;
 401         *t = 0;
 402
 403         this->cached_makehost = strdup(nhost);
 404
 405         return this->cached_makehost;
 406 }
 407
 408 char* userrec::MakeHostIP()
 409 {
 410         if (this->cached_hostip)
 411                 return this->cached_hostip;
 412
 413         char ihost[MAXBUF];
 414         /* This is much faster than snprintf */
 415         char* t = ihost;
 416         for(char* n = ident; *n; n++)
 417                 *t++ = *n;
 418         *t++ = '@';
 419         for(const char* n = this->GetIPString(); *n; n++)
 420                 *t++ = *n;
 421         *t = 0;
 422
 423         this->cached_hostip = strdup(ihost);
 424
 425         return this->cached_hostip;
 426 }
 427
 428 void userrec::CloseSocket()
 429 {
 430         shutdown(this->fd,2);
 431         close(this->fd);
 432 }
 433
 434 char* userrec::GetFullHost()
 435 {
 436         if (this->cached_fullhost)
 437                 return this->cached_fullhost;
 438
 439         char result[MAXBUF];
 440         char* t = result;
 441         for(char* n = nick; *n; n++)
 442                 *t++ = *n;
 443         *t++ = '!';
 444         for(char* n = ident; *n; n++)
 445                 *t++ = *n;
 446         *t++ = '@';
 447         for(char* n = dhost; *n; n++)
 448                 *t++ = *n;
 449         *t = 0;
 450
 451         this->cached_fullhost = strdup(result);
 452
 453         return this->cached_fullhost;
 454 }
 455
 456 char* userrec::MakeWildHost()
 457 {
 458         static char nresult[MAXBUF];
 459         char* t = nresult;
 460         *t++ = '*';     *t++ = '!';
 461         *t++ = '*';     *t++ = '@';
 462         for(char* n = dhost; *n; n++)
 463                 *t++ = *n;
 464         *t = 0;
 465         return nresult;
 466 }
 467
 468 int userrec::ReadData(void* buffer, size_t size)
 469 {
 470         if (IS_LOCAL(this))
 471         {
 472 #ifndef WIN32
 473                 return read(this->fd, buffer, size);
 474 #else
 475                 return recv(this->fd, (char*)buffer, size, 0);
 476 #endif
 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.clear();
 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                 std::string::iterator t = recvq.begin();
 650                 while (t != recvq.end() && (*t == '\r' || *t == '\n'))
 651                 {
 652                         recvq.erase(t);
 653                         t = recvq.begin();
 654                 }
 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.clear();
 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 #endif
 864         inet_ntop(AF_INET, &((const sockaddr_in*)ip)->sin_addr, ipaddr, sizeof(ipaddr));
 865         userrec* New;
 866         int j = 0;
 867
 868         Instance->unregistered_count++;
 869
 870         /*
 871          * fix by brain.
 872          * as these nicknames are 'RFC impossible', we can be sure nobody is going to be
 873          * using one as a registered connection. As they are per fd, we can also safely assume
 874          * that we wont have collisions. Therefore, if the nick exists in the list, its only
 875          * used by a dead socket, erase the iterator so that the new client may reclaim it.
 876          * this was probably the cause of 'server ignores me when i hammer it with reconnects'
 877          * issue in earlier alphas/betas
 878          */
 879         if (iter != Instance->clientlist->end())
 880         {
 881                 userrec* goner = iter->second;
 882                 DELETE(goner);
 883                 Instance->clientlist->erase(iter);
 884         }
 885
 886         New = new userrec(Instance);
 887         (*(Instance->clientlist))[tempnick] = New;
 888         New->fd = socket;
 889         strlcpy(New->nick,tempnick.c_str(),NICKMAX-1);
 890
 891         New->server = Instance->FindServerNamePtr(Instance->Config->ServerName);
 892         /* We don't need range checking here, we KNOW 'unknown\0' will fit into the ident field. */
 893         strcpy(New->ident, "unknown");
 894
 895         New->registered = REG_NONE;
 896         New->signon = Instance->Time() + Instance->Config->dns_timeout;
 897         New->lastping = 1;
 898
 899         New->SetSockAddr(socketfamily, ipaddr, port);
 900
 901         /* Smarter than your average bear^H^H^H^Hset of strlcpys. */
 902         for (const char* temp = New->GetIPString(); *temp && j < 64; temp++, j++)
 903                 New->dhost[j] = New->host[j] = *temp;
 904         New->dhost[j] = New->host[j] = 0;
 905
 906         Instance->AddLocalClone(New);
 907         Instance->AddGlobalClone(New);
 908
 909         /*
 910          * First class check. We do this again in FullConnect after DNS is done, and NICK/USER is recieved.
 911          * See my note down there for why this is required. DO NOT REMOVE. :) -- w00t
 912          */
 913         ConnectClass* i = New->GetClass();
 914
 915         if (!i)
 916         {
 917                 userrec::QuitUser(Instance, New, "Access denied by configuration");
 918                 return;
 919         }
 920
 921         New->CheckClass();
 922
 923         New->pingmax = i->GetPingTime();
 924         New->nping = Instance->Time() + i->GetPingTime() + Instance->Config->dns_timeout;
 925         New->timeout = Instance->Time() + i->GetRegTimeout();
 926         New->flood = i->GetFlood();
 927         New->threshold = i->GetThreshold();
 928         New->sendqmax = i->GetSendqMax();
 929         New->recvqmax = i->GetRecvqMax();
 930
 931         Instance->local_users.push_back(New);
 932
 933         if ((Instance->local_users.size() > Instance->Config->SoftLimit) || (Instance->local_users.size() >= MAXCLIENTS))
 934         {
 935                 Instance->WriteOpers("*** Warning: softlimit value has been reached: %d clients", Instance->Config->SoftLimit);
 936                 userrec::QuitUser(Instance, New,"No more connections allowed");
 937                 return;
 938         }
 939
 940         /*
 941          * XXX -
 942          * this is done as a safety check to keep the file descriptors within range of fd_ref_table.
 943          * its a pretty big but for the moment valid assumption:
 944          * file descriptors are handed out starting at 0, and are recycled as theyre freed.
 945          * therefore if there is ever an fd over 65535, 65536 clients must be connected to the
 946          * irc server at once (or the irc server otherwise initiating this many connections, files etc)
 947          * which for the time being is a physical impossibility (even the largest networks dont have more
 948          * than about 10,000 users on ONE server!)
 949          */
 950 #ifndef WINDOWS
 951         if ((unsigned int)socket >= MAX_DESCRIPTORS)
 952         {
 953                 userrec::QuitUser(Instance, New, "Server is full");
 954                 return;
 955         }
 956 #endif
 957
 958         New->exempt = (Instance->XLines->matches_exception(New) != NULL);
 959         if (!New->exempt)
 960         {
 961                 ZLine* r = Instance->XLines->matches_zline(ipaddr);
 962                 if (r)
 963                 {
 964                         char reason[MAXBUF];
 965                         if (*Instance->Config->MoronBanner)
 966                                 New->WriteServ("NOTICE %s :*** %s", New->nick, Instance->Config->MoronBanner);
 967                         snprintf(reason,MAXBUF,"Z-Lined: %s",r->reason);
 968                         userrec::QuitUser(Instance, New, reason);
 969                         return;
 970                 }
 971         }
 972
 973         if (socket > -1)
 974         {
 975                 if (!Instance->SE->AddFd(New))
 976                 {
 977                         userrec::QuitUser(Instance, New, "Internal error handling connection");
 978                         return;
 979                 }
 980         }
 981
 982         /* NOTE: even if dns lookups are *off*, we still need to display this.
 983          * BOPM and other stuff requires it.
 984          */
 985         New->WriteServ("NOTICE Auth :*** Looking up your hostname...");
 986 }
 987
 988 unsigned long userrec::GlobalCloneCount()
 989 {
 990         clonemap::iterator x = ServerInstance->global_clones.find(this->GetIPString());
 991         if (x != ServerInstance->global_clones.end())
 992                 return x->second;
 993         else
 994                 return 0;
 995 }
 996
 997 unsigned long userrec::LocalCloneCount()
 998 {
 999         clonemap::iterator x = ServerInstance->local_clones.find(this->GetIPString());
1000         if (x != ServerInstance->local_clones.end())
1001                 return x->second;
1002         else
1003                 return 0;
1004 }
1005
1006 /*
1007  * Check class restrictions
1008  */
1009 void userrec::CheckClass()
1010 {
1011         ConnectClass* a = this->GetClass();
1012
1013         if ((!a) || (a->GetType() == CC_DENY))
1014         {
1015                 userrec::QuitUser(ServerInstance, this, "Unauthorised connection");
1016                 return;
1017         }
1018         else if ((!a->GetPass().empty()) && (!this->haspassed))
1019         {
1020                 userrec::QuitUser(ServerInstance, this, "Invalid password");
1021                 return;
1022         }
1023         else if ((a->GetMaxLocal()) && (this->LocalCloneCount() > a->GetMaxLocal()))
1024         {
1025                 userrec::QuitUser(ServerInstance, this, "No more connections allowed from your host via this connect class (local)");
1026                 ServerInstance->WriteOpers("*** WARNING: maximum LOCAL connections (%ld) exceeded for IP %s", a->GetMaxLocal(), this->GetIPString());
1027                 return;
1028         }
1029         else if ((a->GetMaxGlobal()) && (this->GlobalCloneCount() > a->GetMaxGlobal()))
1030         {
1031                 userrec::QuitUser(ServerInstance, this, "No more connections allowed from your host via this connect class (global)");
1032                 ServerInstance->WriteOpers("*** WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s", a->GetMaxGlobal(), this->GetIPString());
1033                 return;
1034         }
1035 }
1036
1037 void userrec::FullConnect()
1038 {
1039         ServerInstance->stats->statsConnects++;
1040         this->idle_lastmsg = ServerInstance->Time();
1041
1042         /*
1043          * You may be thinking "wtf, we checked this in userrec::AddClient!" - and yes, we did, BUT.
1044          * At the time AddClient is called, we don't have a resolved host, by here we probably do - which
1045          * may put the user into a totally seperate class with different restrictions! so we *must* check again.
1046          * Don't remove this! -- w00t
1047          */
1048         this->CheckClass();
1049
1050         if (!this->exempt)
1051         {
1052                 GLine* r = ServerInstance->XLines->matches_gline(this);
1053
1054                 if (r)
1055                 {
1056                         this->muted = true;
1057                         char reason[MAXBUF];
1058                         if (*ServerInstance->Config->MoronBanner)
1059                                 this->WriteServ("NOTICE %s :*** %s", this->nick, ServerInstance->Config->MoronBanner);
1060                         snprintf(reason,MAXBUF,"G-Lined: %s",r->reason);
1061                         ServerInstance->GlobalCulls.AddItem(this, reason);
1062                         return;
1063                 }
1064
1065                 KLine* n = ServerInstance->XLines->matches_kline(this);
1066
1067                 if (n)
1068                 {
1069                         this->muted = true;
1070                         char reason[MAXBUF];
1071                         if (*ServerInstance->Config->MoronBanner)
1072                                 this->WriteServ("NOTICE %s :*** %s", this, ServerInstance->Config->MoronBanner);
1073                         snprintf(reason,MAXBUF,"K-Lined: %s",n->reason);
1074                         ServerInstance->GlobalCulls.AddItem(this, reason);
1075                         return;
1076                 }
1077         }
1078
1079         this->WriteServ("NOTICE Auth :Welcome to \002%s\002!",ServerInstance->Config->Network);
1080         this->WriteServ("001 %s :Welcome to the %s IRC Network %s!%s@%s",this->nick, ServerInstance->Config->Network, this->nick, this->ident, this->host);
1081         this->WriteServ("002 %s :Your host is %s, running version %s",this->nick,ServerInstance->Config->ServerName,VERSION);
1082         this->WriteServ("003 %s :This server was created %s %s", this->nick, __TIME__, __DATE__);
1083         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());
1084
1085         ServerInstance->Config->Send005(this);
1086
1087         this->ShowMOTD();
1088
1089         /* Now registered */
1090         if (ServerInstance->unregistered_count)
1091                 ServerInstance->unregistered_count--;
1092
1093         /* Trigger LUSERS output, give modules a chance too */
1094         int MOD_RESULT = 0;
1095         FOREACH_RESULT(I_OnPreCommand, OnPreCommand("LUSERS", NULL, 0, this, true, "LUSERS"));
1096         if (!MOD_RESULT)
1097                 ServerInstance->CallCommandHandler("LUSERS", NULL, 0, this);
1098
1099         /*
1100          * fix 3 by brain, move registered = 7 below these so that spurious modes and host
1101          * changes dont go out onto the network and produce 'fake direction'.
1102          */
1103         FOREACH_MOD(I_OnUserConnect,OnUserConnect(this));
1104
1105         this->registered = REG_ALL;
1106
1107         FOREACH_MOD(I_OnPostConnect,OnPostConnect(this));
1108
1109         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);
1110 }
1111
1112 /** userrec::UpdateNick()
1113  * re-allocates a nick in the user_hash after they change nicknames,
1114  * returns a pointer to the new user as it may have moved
1115  */
1116 userrec* userrec::UpdateNickHash(const char* New)
1117 {
1118         try
1119         {
1120                 //user_hash::iterator newnick;
1121                 user_hash::iterator oldnick = ServerInstance->clientlist->find(this->nick);
1122
1123                 if (!strcasecmp(this->nick,New))
1124                         return oldnick->second;
1125
1126                 if (oldnick == ServerInstance->clientlist->end())
1127                         return NULL; /* doesnt exist */
1128
1129                 userrec* olduser = oldnick->second;
1130                 (*(ServerInstance->clientlist))[New] = olduser;
1131                 ServerInstance->clientlist->erase(oldnick);
1132                 return olduser;
1133         }
1134
1135         catch (...)
1136         {
1137                 ServerInstance->Log(DEBUG,"Exception in userrec::UpdateNickHash()");
1138                 return NULL;
1139         }
1140 }
1141
1142 void userrec::InvalidateCache()
1143 {
1144         /* Invalidate cache */
1145         if (cached_fullhost)
1146                 free(cached_fullhost);
1147         if (cached_hostip)
1148                 free(cached_hostip);
1149         if (cached_makehost)
1150                 free(cached_makehost);
1151         if (cached_fullrealhost)
1152                 free(cached_fullrealhost);
1153         cached_fullhost = cached_hostip = cached_makehost = cached_fullrealhost = NULL;
1154 }
1155
1156 bool userrec::ForceNickChange(const char* newnick)
1157 {
1158         try
1159         {
1160                 int MOD_RESULT = 0;
1161
1162                 this->InvalidateCache();
1163
1164                 FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(this, newnick));
1165
1166                 if (MOD_RESULT)
1167                 {
1168                         ServerInstance->stats->statsCollisions++;
1169                         return false;
1170                 }
1171
1172                 if (ServerInstance->XLines->matches_qline(newnick))
1173                 {
1174                         ServerInstance->stats->statsCollisions++;
1175                         return false;
1176                 }
1177
1178                 if (this->registered == REG_ALL)
1179                 {
1180                         const char* pars[1];
1181                         pars[0] = newnick;
1182                         std::string cmd = "NICK";
1183                         return (ServerInstance->Parser->CallHandler(cmd, pars, 1, this) == CMD_SUCCESS);
1184                 }
1185                 return false;
1186         }
1187
1188         catch (...)
1189         {
1190                 ServerInstance->Log(DEBUG,"Exception in userrec::ForceNickChange()");
1191                 return false;
1192         }
1193 }
1194
1195 void userrec::SetSockAddr(int protocol_family, const char* ip, int port)
1196 {
1197         switch (protocol_family)
1198         {
1199 #ifdef SUPPORT_IP6LINKS
1200                 case AF_INET6:
1201                 {
1202                         sockaddr_in6* sin = new sockaddr_in6;
1203                         sin->sin6_family = AF_INET6;
1204                         sin->sin6_port = port;
1205                         inet_pton(AF_INET6, ip, &sin->sin6_addr);
1206                         this->ip = (sockaddr*)sin;
1207                 }
1208                 break;
1209 #endif
1210                 case AF_INET:
1211                 {
1212                         sockaddr_in* sin = new sockaddr_in;
1213                         sin->sin_family = AF_INET;
1214                         sin->sin_port = port;
1215                         inet_pton(AF_INET, ip, &sin->sin_addr);
1216                         this->ip = (sockaddr*)sin;
1217                 }
1218                 break;
1219                 default:
1220                         ServerInstance->Log(DEBUG,"Ut oh, I dont know protocol %d to be set on '%s'!", protocol_family, this->nick);
1221                 break;
1222         }
1223 }
1224
1225 int userrec::GetPort()
1226 {
1227         if (this->ip == NULL)
1228                 return 0;
1229
1230         switch (this->GetProtocolFamily())
1231         {
1232 #ifdef SUPPORT_IP6LINKS
1233                 case AF_INET6:
1234                 {
1235                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1236                         return sin->sin6_port;
1237                 }
1238                 break;
1239 #endif
1240                 case AF_INET:
1241                 {
1242                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1243                         return sin->sin_port;
1244                 }
1245                 break;
1246                 default:
1247                 break;
1248         }
1249         return 0;
1250 }
1251
1252 int userrec::GetProtocolFamily()
1253 {
1254         if (this->ip == NULL)
1255                 return 0;
1256
1257         sockaddr_in* sin = (sockaddr_in*)this->ip;
1258         return sin->sin_family;
1259 }
1260
1261 const char* userrec::GetIPString()
1262 {
1263         static char buf[1024];
1264
1265         if (this->ip == NULL)
1266                 return "";
1267
1268         switch (this->GetProtocolFamily())
1269         {
1270 #ifdef SUPPORT_IP6LINKS
1271                 case AF_INET6:
1272                 {
1273                         static char temp[1024];
1274
1275                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1276                         inet_ntop(sin->sin6_family, &sin->sin6_addr, buf, sizeof(buf));
1277                         /* IP addresses starting with a : on irc are a Bad Thing (tm) */
1278                         if (*buf == ':')
1279                         {
1280                                 strlcpy(&temp[1], buf, sizeof(temp) - 1);
1281                                 *temp = '0';
1282                                 return temp;
1283                         }
1284                         return buf;
1285                 }
1286                 break;
1287 #endif
1288                 case AF_INET:
1289                 {
1290                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1291                         inet_ntop(sin->sin_family, &sin->sin_addr, buf, sizeof(buf));
1292                         return buf;
1293                 }
1294                 break;
1295                 default:
1296                 break;
1297         }
1298         return "";
1299 }
1300
1301 const char* userrec::GetIPString(char* buf)
1302 {
1303         if (this->ip == NULL)
1304         {
1305                 *buf = 0;
1306                 return buf;
1307         }
1308
1309         switch (this->GetProtocolFamily())
1310         {
1311 #ifdef SUPPORT_IP6LINKS
1312                 case AF_INET6:
1313                 {
1314                         static char temp[1024];
1315
1316                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1317                         inet_ntop(sin->sin6_family, &sin->sin6_addr, buf, sizeof(buf));
1318                         /* IP addresses starting with a : on irc are a Bad Thing (tm) */
1319                         if (*buf == ':')
1320                         {
1321                                 strlcpy(&temp[1], buf, sizeof(temp) - 1);
1322                                 *temp = '0';
1323                                 strlcpy(buf, temp, sizeof(temp));
1324                         }
1325                         return buf;
1326                 }
1327                 break;
1328 #endif
1329                 case AF_INET:
1330                 {
1331                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1332                         inet_ntop(sin->sin_family, &sin->sin_addr, buf, sizeof(buf));
1333                         return buf;
1334                 }
1335                 break;
1336
1337                 default:
1338                 break;
1339         }
1340         return "";
1341 }
1342
1343 /** NOTE: We cannot pass a const reference to this method.
1344  * The string is changed by the workings of the method,
1345  * so that if we pass const ref, we end up copying it to
1346  * something we can change anyway. Makes sense to just let
1347  * the compiler do that copy for us.
1348  */
1349 void userrec::Write(std::string text)
1350 {
1351 #ifdef WINDOWS
1352         if ((this->fd < 0) || (this->m_internalFd > MAX_DESCRIPTORS))
1353 #else
1354         if ((this->fd < 0) || (this->fd > MAX_DESCRIPTORS))
1355 #endif
1356                 return;
1357
1358         try
1359         {
1360                 /* ServerInstance->Log(DEBUG,"C[%d] <- %s", this->GetFd(), text.c_str());
1361                  * WARNING: The above debug line is VERY loud, do NOT
1362                  * enable it till we have a good way of filtering it
1363                  * out of the logs (e.g. 1.2 would be good).
1364                  */
1365                 text.append("\r\n");
1366         }
1367         catch (...)
1368         {
1369                 ServerInstance->Log(DEBUG,"Exception in userrec::Write() std::string::append");
1370                 return;
1371         }
1372
1373         if (ServerInstance->Config->GetIOHook(this->GetPort()))
1374         {
1375                 try
1376                 {
1377                         ServerInstance->Config->GetIOHook(this->GetPort())->OnRawSocketWrite(this->fd, text.data(), text.length());
1378                 }
1379                 catch (CoreException& modexcept)
1380                 {
1381                         ServerInstance->Log(DEBUG, "%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
1382                 }
1383         }
1384         else
1385         {
1386                 this->AddWriteBuf(text);
1387         }
1388         ServerInstance->stats->statsSent += text.length();
1389         this->ServerInstance->SE->WantWrite(this);
1390 }
1391
1392 /** Write()
1393  */
1394 void userrec::Write(const char *text, ...)
1395 {
1396         va_list argsPtr;
1397         char textbuffer[MAXBUF];
1398
1399         va_start(argsPtr, text);
1400         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1401         va_end(argsPtr);
1402
1403         this->Write(std::string(textbuffer));
1404 }
1405
1406 void userrec::WriteServ(const std::string& text)
1407 {
1408         char textbuffer[MAXBUF];
1409
1410         snprintf(textbuffer,MAXBUF,":%s %s",ServerInstance->Config->ServerName,text.c_str());
1411         this->Write(std::string(textbuffer));
1412 }
1413
1414 /** WriteServ()
1415  *  Same as Write(), except `text' is prefixed with `:server.name '.
1416  */
1417 void userrec::WriteServ(const char* text, ...)
1418 {
1419         va_list argsPtr;
1420         char textbuffer[MAXBUF];
1421
1422         va_start(argsPtr, text);
1423         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1424         va_end(argsPtr);
1425
1426         this->WriteServ(std::string(textbuffer));
1427 }
1428
1429
1430 void userrec::WriteFrom(userrec *user, const std::string &text)
1431 {
1432         char tb[MAXBUF];
1433
1434         snprintf(tb,MAXBUF,":%s %s",user->GetFullHost(),text.c_str());
1435
1436         this->Write(std::string(tb));
1437 }
1438
1439
1440 /* write text from an originating user to originating user */
1441
1442 void userrec::WriteFrom(userrec *user, const char* text, ...)
1443 {
1444         va_list argsPtr;
1445         char textbuffer[MAXBUF];
1446
1447         va_start(argsPtr, text);
1448         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1449         va_end(argsPtr);
1450
1451         this->WriteFrom(user, std::string(textbuffer));
1452 }
1453
1454
1455 /* write text to an destination user from a source user (e.g. user privmsg) */
1456
1457 void userrec::WriteTo(userrec *dest, const char *data, ...)
1458 {
1459         char textbuffer[MAXBUF];
1460         va_list argsPtr;
1461
1462         va_start(argsPtr, data);
1463         vsnprintf(textbuffer, MAXBUF, data, argsPtr);
1464         va_end(argsPtr);
1465
1466         this->WriteTo(dest, std::string(textbuffer));
1467 }
1468
1469 void userrec::WriteTo(userrec *dest, const std::string &data)
1470 {
1471         dest->WriteFrom(this, data);
1472 }
1473
1474
1475 void userrec::WriteCommon(const char* text, ...)
1476 {
1477         char textbuffer[MAXBUF];
1478         va_list argsPtr;
1479
1480         if (this->registered != REG_ALL)
1481                 return;
1482
1483         va_start(argsPtr, text);
1484         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1485         va_end(argsPtr);
1486
1487         this->WriteCommon(std::string(textbuffer));
1488 }
1489
1490 void userrec::WriteCommon(const std::string &text)
1491 {
1492         try
1493         {
1494                 bool sent_to_at_least_one = false;
1495                 char tb[MAXBUF];
1496
1497                 if (this->registered != REG_ALL)
1498                         return;
1499
1500                 uniq_id++;
1501
1502                 /* We dont want to be doing this n times, just once */
1503                 snprintf(tb,MAXBUF,":%s %s",this->GetFullHost(),text.c_str());
1504                 std::string out = tb;
1505
1506                 for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1507                 {
1508                         CUList* ulist = v->first->GetUsers();
1509                         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1510                         {
1511                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1512                                 {
1513                                         already_sent[i->first->fd] = uniq_id;
1514                                         i->first->Write(out);
1515                                         sent_to_at_least_one = true;
1516                                 }
1517                         }
1518                 }
1519
1520                 /*
1521                  * if the user was not in any channels, no users will receive the text. Make sure the user
1522                  * receives their OWN message for WriteCommon
1523                  */
1524                 if (!sent_to_at_least_one)
1525                 {
1526                         this->Write(std::string(tb));
1527                 }
1528         }
1529
1530         catch (...)
1531         {
1532                 ServerInstance->Log(DEBUG,"Exception in userrec::WriteCommon()");
1533         }
1534 }
1535
1536
1537 /* write a formatted string to all users who share at least one common
1538  * channel, NOT including the source user e.g. for use in QUIT
1539  */
1540
1541 void userrec::WriteCommonExcept(const char* text, ...)
1542 {
1543         char textbuffer[MAXBUF];
1544         va_list argsPtr;
1545
1546         va_start(argsPtr, text);
1547         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1548         va_end(argsPtr);
1549
1550         this->WriteCommonExcept(std::string(textbuffer));
1551 }
1552
1553 void userrec::WriteCommonQuit(const std::string &normal_text, const std::string &oper_text)
1554 {
1555         char tb1[MAXBUF];
1556         char tb2[MAXBUF];
1557
1558         if (this->registered != REG_ALL)
1559                 return;
1560
1561         uniq_id++;
1562         snprintf(tb1,MAXBUF,":%s QUIT :%s",this->GetFullHost(),normal_text.c_str());
1563         snprintf(tb2,MAXBUF,":%s QUIT :%s",this->GetFullHost(),oper_text.c_str());
1564         std::string out1 = tb1;
1565         std::string out2 = tb2;
1566
1567         for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1568         {
1569                 CUList *ulist = v->first->GetUsers();
1570                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1571                 {
1572                         if (this != i->first)
1573                         {
1574                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1575                                 {
1576                                         already_sent[i->first->fd] = uniq_id;
1577                                         i->first->Write(IS_OPER(i->first) ? out2 : out1);
1578                                 }
1579                         }
1580                 }
1581         }
1582 }
1583
1584 void userrec::WriteCommonExcept(const std::string &text)
1585 {
1586         char tb1[MAXBUF];
1587         std::string out1;
1588
1589         if (this->registered != REG_ALL)
1590                 return;
1591
1592         uniq_id++;
1593         snprintf(tb1,MAXBUF,":%s %s",this->GetFullHost(),text.c_str());
1594         out1 = tb1;
1595
1596         for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1597         {
1598                 CUList *ulist = v->first->GetUsers();
1599                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1600                 {
1601                         if (this != i->first)
1602                         {
1603                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1604                                 {
1605                                         already_sent[i->first->fd] = uniq_id;
1606                                         i->first->Write(out1);
1607                                 }
1608                         }
1609                 }
1610         }
1611
1612 }
1613
1614 void userrec::WriteWallOps(const std::string &text)
1615 {
1616         if (!IS_OPER(this) && IS_LOCAL(this))
1617                 return;
1618
1619         std::string wallop = "WALLOPS :" + text;
1620
1621         for (std::vector<userrec*>::const_iterator i = ServerInstance->local_users.begin(); i != ServerInstance->local_users.end(); i++)
1622         {
1623                 userrec* t = *i;
1624                 if (t->modes[UM_WALLOPS])
1625                         this->WriteTo(t,wallop);
1626         }
1627 }
1628
1629 void userrec::WriteWallOps(const char* text, ...)
1630 {
1631         char textbuffer[MAXBUF];
1632         va_list argsPtr;
1633
1634         va_start(argsPtr, text);
1635         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1636         va_end(argsPtr);
1637
1638         this->WriteWallOps(std::string(textbuffer));
1639 }
1640
1641 /* return 0 or 1 depending if users u and u2 share one or more common channels
1642  * (used by QUIT, NICK etc which arent channel specific notices)
1643  *
1644  * The old algorithm in 1.0 for this was relatively inefficient, iterating over
1645  * the first users channels then the second users channels within the outer loop,
1646  * therefore it was a maximum of x*y iterations (upon returning 0 and checking
1647  * all possible iterations). However this new function instead checks against the
1648  * channel's userlist in the inner loop which is a std::map<userrec*,userrec*>
1649  * and saves us time as we already know what pointer value we are after.
1650  * Don't quote me on the maths as i am not a mathematician or computer scientist,
1651  * but i believe this algorithm is now x+(log y) maximum iterations instead.
1652  */
1653 bool userrec::SharesChannelWith(userrec *other)
1654 {
1655         if ((!other) || (this->registered != REG_ALL) || (other->registered != REG_ALL))
1656                 return false;
1657
1658         /* Outer loop */
1659         for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1660         {
1661                 /* Eliminate the inner loop (which used to be ~equal in size to the outer loop)
1662                  * by replacing it with a map::find which *should* be more efficient
1663                  */
1664                 if (i->first->HasUser(other))
1665                         return true;
1666         }
1667         return false;
1668 }
1669
1670 bool userrec::ChangeName(const char* gecos)
1671 {
1672         if (!strcmp(gecos, this->fullname))
1673                 return true;
1674
1675         if (IS_LOCAL(this))
1676         {
1677                 int MOD_RESULT = 0;
1678                 FOREACH_RESULT(I_OnChangeLocalUserGECOS,OnChangeLocalUserGECOS(this,gecos));
1679                 if (MOD_RESULT)
1680                         return false;
1681                 FOREACH_MOD(I_OnChangeName,OnChangeName(this,gecos));
1682         }
1683         strlcpy(this->fullname,gecos,MAXGECOS+1);
1684
1685         return true;
1686 }
1687
1688 bool userrec::ChangeDisplayedHost(const char* host)
1689 {
1690         if (!strcmp(host, this->dhost))
1691                 return true;
1692
1693         if (IS_LOCAL(this))
1694         {
1695                 int MOD_RESULT = 0;
1696                 FOREACH_RESULT(I_OnChangeLocalUserHost,OnChangeLocalUserHost(this,host));
1697                 if (MOD_RESULT)
1698                         return false;
1699                 FOREACH_MOD(I_OnChangeHost,OnChangeHost(this,host));
1700         }
1701         if (this->ServerInstance->Config->CycleHosts)
1702                 this->WriteCommonExcept("QUIT :Changing hosts");
1703
1704         /* Fix by Om: userrec::dhost is 65 long, this was truncating some long hosts */
1705         strlcpy(this->dhost,host,64);
1706
1707         this->InvalidateCache();
1708
1709         if (this->ServerInstance->Config->CycleHosts)
1710         {
1711                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1712                 {
1713                         i->first->WriteAllExceptSender(this, false, 0, "JOIN %s", i->first->name);
1714                         std::string n = this->ServerInstance->Modes->ModeString(this, i->first);
1715                         if (n.length() > 0)
1716                                 i->first->WriteAllExceptSender(this, true, 0, "MODE %s +%s", i->first->name, n.c_str());
1717                 }
1718         }
1719
1720         if (IS_LOCAL(this))
1721                 this->WriteServ("396 %s %s :is now your displayed host",this->nick,this->dhost);
1722
1723         return true;
1724 }
1725
1726 bool userrec::ChangeIdent(const char* newident)
1727 {
1728         if (!strcmp(newident, this->ident))
1729                 return true;
1730
1731         if (this->ServerInstance->Config->CycleHosts)
1732                 this->WriteCommonExcept("%s","QUIT :Changing ident");
1733
1734         strlcpy(this->ident, newident, IDENTMAX+2);
1735
1736         this->InvalidateCache();
1737
1738         if (this->ServerInstance->Config->CycleHosts)
1739         {
1740                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1741                 {
1742                         i->first->WriteAllExceptSender(this, false, 0, "JOIN %s", i->first->name);
1743                         std::string n = this->ServerInstance->Modes->ModeString(this, i->first);
1744                         if (n.length() > 0)
1745                                 i->first->WriteAllExceptSender(this, true, 0, "MODE %s +%s", i->first->name, n.c_str());
1746                 }
1747         }
1748
1749         return true;
1750 }
1751
1752 void userrec::SendAll(const char* command, char* text, ...)
1753 {
1754         char textbuffer[MAXBUF];
1755         char formatbuffer[MAXBUF];
1756         va_list argsPtr;
1757
1758         va_start(argsPtr, text);
1759         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1760         va_end(argsPtr);
1761
1762         snprintf(formatbuffer,MAXBUF,":%s %s $* :%s", this->GetFullHost(), command, textbuffer);
1763         std::string fmt = formatbuffer;
1764
1765         for (std::vector<userrec*>::const_iterator i = ServerInstance->local_users.begin(); i != ServerInstance->local_users.end(); i++)
1766         {
1767                 (*i)->Write(fmt);
1768         }
1769 }
1770
1771
1772 std::string userrec::ChannelList(userrec* source)
1773 {
1774         try
1775         {
1776                 std::string list;
1777                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1778                 {
1779                         /* If the target is the same as the sender, let them see all their channels.
1780                          * If the channel is NOT private/secret OR the user shares a common channel
1781                          * If the user is an oper, and the <options:operspywhois> option is set.
1782                          */
1783                         if ((source == this) || (IS_OPER(source) && ServerInstance->Config->OperSpyWhois) || (((!i->first->modes[CM_PRIVATE]) && (!i->first->modes[CM_SECRET])) || (i->first->HasUser(source))))
1784                         {
1785                                 list.append(i->first->GetPrefixChar(this)).append(i->first->name).append(" ");
1786                         }
1787                 }
1788                 return list;
1789         }
1790         catch (...)
1791         {
1792                 ServerInstance->Log(DEBUG,"Exception in userrec::ChannelList()");
1793                 return "";
1794         }
1795 }
1796
1797 void userrec::SplitChanList(userrec* dest, const std::string &cl)
1798 {
1799         std::string line;
1800         std::ostringstream prefix;
1801         std::string::size_type start, pos, length;
1802
1803         try
1804         {
1805                 prefix << this->nick << " " << dest->nick << " :";
1806                 line = prefix.str();
1807                 int namelen = strlen(ServerInstance->Config->ServerName) + 6;
1808
1809                 for (start = 0; (pos = cl.find(' ', start)) != std::string::npos; start = pos+1)
1810                 {
1811                         length = (pos == std::string::npos) ? cl.length() : pos;
1812
1813                         if (line.length() + namelen + length - start > 510)
1814                         {
1815                                 ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1816                                 line = prefix.str();
1817                         }
1818
1819                         if(pos == std::string::npos)
1820                         {
1821                                 line.append(cl.substr(start, length - start));
1822                                 break;
1823                         }
1824                         else
1825                         {
1826                                 line.append(cl.substr(start, length - start + 1));
1827                         }
1828                 }
1829
1830                 if (line.length())
1831                 {
1832                         ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1833                 }
1834         }
1835
1836         catch (...)
1837         {
1838                 ServerInstance->Log(DEBUG,"Exception in userrec::SplitChanList()");
1839         }
1840 }
1841
1842
1843 /* looks up a users password for their connection class (<ALLOW>/<DENY> tags)
1844  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1845  * then their ip will be taken as 'priority' anyway, so for example,
1846  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1847  */
1848 ConnectClass* userrec::GetClass()
1849 {
1850         for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1851         {
1852                 if (((match(this->GetIPString(),i->GetHost().c_str(),true)) || (match(this->host,i->GetHost().c_str()))))
1853                 {
1854                         if (i->GetPort())
1855                         {
1856                                 if (this->GetPort() == i->GetPort())
1857                                         return &(*i);
1858                                 else
1859                                         continue;
1860                         }
1861                         else
1862                                 return &(*i);
1863                 }
1864         }
1865         return NULL;
1866 }
1867
1868 void userrec::PurgeEmptyChannels()
1869 {
1870         std::vector<chanrec*> to_delete;
1871
1872         // firstly decrement the count on each channel
1873         for (UCListIter f = this->chans.begin(); f != this->chans.end(); f++)
1874         {
1875                 f->first->RemoveAllPrefixes(this);
1876                 if (f->first->DelUser(this) == 0)
1877                 {
1878                         /* No users left in here, mark it for deletion */
1879                         try
1880                         {
1881                                 to_delete.push_back(f->first);
1882                         }
1883                         catch (...)
1884                         {
1885                                 ServerInstance->Log(DEBUG,"Exception in userrec::PurgeEmptyChannels to_delete.push_back()");
1886                         }
1887                 }
1888         }
1889
1890         for (std::vector<chanrec*>::iterator n = to_delete.begin(); n != to_delete.end(); n++)
1891         {
1892                 chanrec* thischan = *n;
1893                 chan_hash::iterator i2 = ServerInstance->chanlist->find(thischan->name);
1894                 if (i2 != ServerInstance->chanlist->end())
1895                 {
1896                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(i2->second));
1897                         DELETE(i2->second);
1898                         ServerInstance->chanlist->erase(i2);
1899                         this->chans.erase(*n);
1900                 }
1901         }
1902
1903         this->UnOper();
1904 }
1905
1906 void userrec::ShowMOTD()
1907 {
1908         if (!ServerInstance->Config->MOTD.size())
1909         {
1910                 this->WriteServ("422 %s :Message of the day file is missing.",this->nick);
1911                 return;
1912         }
1913         this->WriteServ("375 %s :%s message of the day", this->nick, ServerInstance->Config->ServerName);
1914
1915         for (file_cache::iterator i = ServerInstance->Config->MOTD.begin(); i != ServerInstance->Config->MOTD.end(); i++)
1916                 this->WriteServ("372 %s :- %s",this->nick,i->c_str());
1917
1918         this->WriteServ("376 %s :End of message of the day.", this->nick);
1919 }
1920
1921 void userrec::ShowRULES()
1922 {
1923         if (!ServerInstance->Config->RULES.size())
1924         {
1925                 this->WriteServ("NOTICE %s :Rules file is missing.",this->nick);
1926                 return;
1927         }
1928         this->WriteServ("NOTICE %s :%s rules",this->nick,ServerInstance->Config->ServerName);
1929
1930         for (file_cache::iterator i = ServerInstance->Config->RULES.begin(); i != ServerInstance->Config->RULES.end(); i++)
1931                 this->WriteServ("NOTICE %s :%s",this->nick,i->c_str());
1932
1933         this->WriteServ("NOTICE %s :End of %s rules.",this->nick,ServerInstance->Config->ServerName);
1934 }
1935
1936 void userrec::HandleEvent(EventType et, int errornum)
1937 {
1938         /* WARNING: May delete this user! */
1939         int thisfd = this->GetFd();
1940
1941         try
1942         {
1943                 switch (et)
1944                 {
1945                         case EVENT_READ:
1946                                 ServerInstance->ProcessUser(this);
1947                         break;
1948                         case EVENT_WRITE:
1949                                 this->FlushWriteBuf();
1950                         break;
1951                         case EVENT_ERROR:
1952                                 /** This should be safe, but dont DARE do anything after it -- Brain */
1953                                 this->SetWriteError(errornum ? strerror(errornum) : "EOF from client");
1954                         break;
1955                 }
1956         }
1957         catch (...)
1958         {
1959                 ServerInstance->Log(DEBUG,"Exception in userrec::HandleEvent intercepted");
1960         }
1961
1962         /* If the user has raised an error whilst being processed, quit them now we're safe to */
1963         if ((ServerInstance->SE->GetRef(thisfd) == this))
1964         {
1965                 if (!WriteError.empty())
1966                 {
1967                         userrec::QuitUser(ServerInstance, this, GetWriteError());
1968                 }
1969         }
1970 }
1971
1972 void userrec::SetOperQuit(const std::string &oquit)
1973 {
1974         if (operquit)
1975                 return;
1976
1977         operquit = strdup(oquit.c_str());
1978 }
1979
1980 const char* userrec::GetOperQuit()
1981 {
1982         return operquit ? operquit : "";
1983 }
1984
1985 VisData::VisData()
1986 {
1987 }
1988
1989 VisData::~VisData()
1990 {
1991 }
1992
1993 bool VisData::VisibleTo(userrec* user)
1994 {
1995         return true;
1996 }
1997