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, int resultnum)
 168 {
 169         /* We are only interested in the first matching result */
 170         if (resultnum)
 171                 return;
 172
 173         if ((!this->fwd) && (ServerInstance->SE->GetRef(this->bound_fd) == this->bound_user))
 174         {
 175                 this->bound_user->stored_host = result;
 176                 try
 177                 {
 178                         /* Check we didnt time out */
 179                         if (this->bound_user->registered != REG_ALL)
 180                         {
 181                                 bool cached;
 182 #ifdef IPV6
 183                                 if (this->bound_user->GetProtocolFamily() == AF_INET6)
 184                                 {
 185                                         /* IPV6 forward lookup (with possibility of 4in6) */
 186                                         const char* ip = this->bound_user->GetIPString();
 187                                         bound_user->res_forward = new UserResolver(this->ServerInstance, this->bound_user, result, (!strncmp(ip, "0::ffff:", 8) ? DNS_QUERY_A : DNS_QUERY_AAAA), cached);
 188                                 }
 189                                 else
 190                                         /* IPV4 lookup (mixed protocol mode) */
 191 #endif
 192                                 /* IPV4 lookup (ipv4 only mode) */
 193                                 bound_user->res_forward = new UserResolver(this->ServerInstance, this->bound_user, result, DNS_QUERY_A, cached);
 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.insert(0, "0");
 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, const std::string &uid) : ServerInstance(Instance)
 327 {
 328         *password = *nick = *ident = *host = *dhost = *fullname = *awaymsg = *oper = *uuid = 0;
 329         server = (char*)Instance->FindServerNamePtr(Instance->Config->ServerName);
 330         reset_due = ServerInstance->Time();
 331         age = ServerInstance->Time(true);
 332         lines_in = lastping = signon = idle_lastmsg = nping = registered = 0;
 333         ChannelCount = timeout = flood = bytes_in = bytes_out = cmds_in = cmds_out = 0;
 334         muted = exempt = haspassed = dns_done = false;
 335         fd = -1;
 336         recvq.clear();
 337         sendq.clear();
 338         WriteError.clear();
 339         res_forward = res_reverse = NULL;
 340         Visibility = NULL;
 341         ip = NULL;
 342         chans.clear();
 343         invites.clear();
 344         memset(modes,0,sizeof(modes));
 345         memset(snomasks,0,sizeof(snomasks));
 346         /* Invalidate cache */
 347         operquit = cached_fullhost = cached_hostip = cached_makehost = cached_fullrealhost = NULL;
 348         if (!uid.empty())
 349                 strlcpy(uuid, uid.c_str(), UUID_LENGTH);
 350 }
 351
 352 void userrec::RemoveCloneCounts()
 353 {
 354         clonemap::iterator x = ServerInstance->local_clones.find(this->GetIPString());
 355         if (x != ServerInstance->local_clones.end())
 356         {
 357                 x->second--;
 358                 if (!x->second)
 359                 {
 360                         ServerInstance->local_clones.erase(x);
 361                 }
 362         }
 363
 364         clonemap::iterator y = ServerInstance->global_clones.find(this->GetIPString());
 365         if (y != ServerInstance->global_clones.end())
 366         {
 367                 y->second--;
 368                 if (!y->second)
 369                 {
 370                         ServerInstance->global_clones.erase(y);
 371                 }
 372         }
 373 }
 374
 375 userrec::~userrec()
 376 {
 377         this->InvalidateCache();
 378         this->DecrementModes();
 379         if (operquit)
 380                 free(operquit);
 381         if (ip)
 382         {
 383                 this->RemoveCloneCounts();
 384
 385                 if (this->GetProtocolFamily() == AF_INET)
 386                 {
 387                         delete (sockaddr_in*)ip;
 388                 }
 389 #ifdef SUPPORT_IP6LINKS
 390                 else
 391                 {
 392                         delete (sockaddr_in6*)ip;
 393                 }
 394 #endif
 395         }
 396 }
 397
 398 char* userrec::MakeHost()
 399 {
 400         if (this->cached_makehost)
 401                 return this->cached_makehost;
 402
 403         char nhost[MAXBUF];
 404         /* This is much faster than snprintf */
 405         char* t = nhost;
 406         for(char* n = ident; *n; n++)
 407                 *t++ = *n;
 408         *t++ = '@';
 409         for(char* n = host; *n; n++)
 410                 *t++ = *n;
 411         *t = 0;
 412
 413         this->cached_makehost = strdup(nhost);
 414
 415         return this->cached_makehost;
 416 }
 417
 418 char* userrec::MakeHostIP()
 419 {
 420         if (this->cached_hostip)
 421                 return this->cached_hostip;
 422
 423         char ihost[MAXBUF];
 424         /* This is much faster than snprintf */
 425         char* t = ihost;
 426         for(char* n = ident; *n; n++)
 427                 *t++ = *n;
 428         *t++ = '@';
 429         for(const char* n = this->GetIPString(); *n; n++)
 430                 *t++ = *n;
 431         *t = 0;
 432
 433         this->cached_hostip = strdup(ihost);
 434
 435         return this->cached_hostip;
 436 }
 437
 438 void userrec::CloseSocket()
 439 {
 440         ServerInstance->SE->Shutdown(this, 2);
 441         ServerInstance->SE->Close(this);
 442 }
 443
 444 char* userrec::GetFullHost()
 445 {
 446         if (this->cached_fullhost)
 447                 return this->cached_fullhost;
 448
 449         char result[MAXBUF];
 450         char* t = result;
 451         for(char* n = nick; *n; n++)
 452                 *t++ = *n;
 453         *t++ = '!';
 454         for(char* n = ident; *n; n++)
 455                 *t++ = *n;
 456         *t++ = '@';
 457         for(char* n = dhost; *n; n++)
 458                 *t++ = *n;
 459         *t = 0;
 460
 461         this->cached_fullhost = strdup(result);
 462
 463         return this->cached_fullhost;
 464 }
 465
 466 char* userrec::MakeWildHost()
 467 {
 468         static char nresult[MAXBUF];
 469         char* t = nresult;
 470         *t++ = '*';     *t++ = '!';
 471         *t++ = '*';     *t++ = '@';
 472         for(char* n = dhost; *n; n++)
 473                 *t++ = *n;
 474         *t = 0;
 475         return nresult;
 476 }
 477
 478 int userrec::ReadData(void* buffer, size_t size)
 479 {
 480         if (IS_LOCAL(this))
 481         {
 482 #ifndef WIN32
 483                 return read(this->fd, buffer, size);
 484 #else
 485                 return recv(this->fd, (char*)buffer, size, 0);
 486 #endif
 487         }
 488         else
 489                 return 0;
 490 }
 491
 492
 493 char* userrec::GetFullRealHost()
 494 {
 495         if (this->cached_fullrealhost)
 496                 return this->cached_fullrealhost;
 497
 498         char fresult[MAXBUF];
 499         char* t = fresult;
 500         for(char* n = nick; *n; n++)
 501                 *t++ = *n;
 502         *t++ = '!';
 503         for(char* n = ident; *n; n++)
 504                 *t++ = *n;
 505         *t++ = '@';
 506         for(char* n = host; *n; n++)
 507                 *t++ = *n;
 508         *t = 0;
 509
 510         this->cached_fullrealhost = strdup(fresult);
 511
 512         return this->cached_fullrealhost;
 513 }
 514
 515 bool userrec::IsInvited(const irc::string &channel)
 516 {
 517         for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 518         {
 519                 if (channel == *i)
 520                 {
 521                         return true;
 522                 }
 523         }
 524         return false;
 525 }
 526
 527 InvitedList* userrec::GetInviteList()
 528 {
 529         return &invites;
 530 }
 531
 532 void userrec::InviteTo(const irc::string &channel)
 533 {
 534         invites.push_back(channel);
 535 }
 536
 537 void userrec::RemoveInvite(const irc::string &channel)
 538 {
 539         for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 540         {
 541                 if (channel == *i)
 542                 {
 543                         invites.erase(i);
 544                         return;
 545                 }
 546         }
 547 }
 548
 549 bool userrec::HasPermission(const std::string &command)
 550 {
 551         char* mycmd;
 552         char* savept;
 553         char* savept2;
 554
 555         /*
 556          * users on remote servers can completely bypass all permissions based checks.
 557          * This prevents desyncs when one server has different type/class tags to another.
 558          * That having been said, this does open things up to the possibility of source changes
 559          * allowing remote kills, etc - but if they have access to the src, they most likely have
 560          * access to the conf - so it's an end to a means either way.
 561          */
 562         if (!IS_LOCAL(this))
 563                 return true;
 564
 565         // are they even an oper at all?
 566         if (IS_OPER(this))
 567         {
 568                 opertype_t::iterator iter_opertype = ServerInstance->Config->opertypes.find(this->oper);
 569                 if (iter_opertype != ServerInstance->Config->opertypes.end())
 570                 {
 571                         char* Classes = strdup(iter_opertype->second);
 572                         char* myclass = strtok_r(Classes," ",&savept);
 573                         while (myclass)
 574                         {
 575                                 operclass_t::iterator iter_operclass = ServerInstance->Config->operclass.find(myclass);
 576                                 if (iter_operclass != ServerInstance->Config->operclass.end())
 577                                 {
 578                                         char* CommandList = strdup(iter_operclass->second);
 579                                         mycmd = strtok_r(CommandList," ",&savept2);
 580                                         while (mycmd)
 581                                         {
 582                                                 if ((!strcasecmp(mycmd,command.c_str())) || (*mycmd == '*'))
 583                                                 {
 584                                                         free(Classes);
 585                                                         free(CommandList);
 586                                                         return true;
 587                                                 }
 588                                                 mycmd = strtok_r(NULL," ",&savept2);
 589                                         }
 590                                         free(CommandList);
 591                                 }
 592                                 myclass = strtok_r(NULL," ",&savept);
 593                         }
 594                         free(Classes);
 595                 }
 596         }
 597         return false;
 598 }
 599
 600 /** NOTE: We cannot pass a const reference to this method.
 601  * The string is changed by the workings of the method,
 602  * so that if we pass const ref, we end up copying it to
 603  * something we can change anyway. Makes sense to just let
 604  * the compiler do that copy for us.
 605  */
 606 bool userrec::AddBuffer(std::string a)
 607 {
 608         try
 609         {
 610                 std::string::size_type i = a.rfind('\r');
 611
 612                 while (i != std::string::npos)
 613                 {
 614                         a.erase(i, 1);
 615                         i = a.rfind('\r');
 616                 }
 617
 618                 if (a.length())
 619                         recvq.append(a);
 620
 621                 if (recvq.length() > (unsigned)this->recvqmax)
 622                 {
 623                         this->SetWriteError("RecvQ exceeded");
 624                         ServerInstance->WriteOpers("*** User %s RecvQ of %d exceeds connect class maximum of %d",this->nick,recvq.length(),this->recvqmax);
 625                         return false;
 626                 }
 627
 628                 return true;
 629         }
 630
 631         catch (...)
 632         {
 633                 ServerInstance->Log(DEBUG,"Exception in userrec::AddBuffer()");
 634                 return false;
 635         }
 636 }
 637
 638 bool userrec::BufferIsReady()
 639 {
 640         return (recvq.find('\n') != std::string::npos);
 641 }
 642
 643 void userrec::ClearBuffer()
 644 {
 645         recvq.clear();
 646 }
 647
 648 std::string userrec::GetBuffer()
 649 {
 650         try
 651         {
 652                 if (!recvq.length())
 653                         return "";
 654
 655                 /* Strip any leading \r or \n off the string.
 656                  * Usually there are only one or two of these,
 657                  * so its is computationally cheap to do.
 658                  */
 659                 std::string::iterator t = recvq.begin();
 660                 while (t != recvq.end() && (*t == '\r' || *t == '\n'))
 661                 {
 662                         recvq.erase(t);
 663                         t = recvq.begin();
 664                 }
 665
 666                 for (std::string::iterator x = recvq.begin(); x != recvq.end(); x++)
 667                 {
 668                         /* Find the first complete line, return it as the
 669                          * result, and leave the recvq as whats left
 670                          */
 671                         if (*x == '\n')
 672                         {
 673                                 std::string ret = std::string(recvq.begin(), x);
 674                                 recvq.erase(recvq.begin(), x + 1);
 675                                 return ret;
 676                         }
 677                 }
 678                 return "";
 679         }
 680
 681         catch (...)
 682         {
 683                 ServerInstance->Log(DEBUG,"Exception in userrec::GetBuffer()");
 684                 return "";
 685         }
 686 }
 687
 688 void userrec::AddWriteBuf(const std::string &data)
 689 {
 690         if (*this->GetWriteError())
 691                 return;
 692
 693         if (sendq.length() + data.length() > (unsigned)this->sendqmax)
 694         {
 695                 /*
 696                  * Fix by brain - Set the error text BEFORE calling writeopers, because
 697                  * if we dont it'll recursively  call here over and over again trying
 698                  * to repeatedly add the text to the sendq!
 699                  */
 700                 this->SetWriteError("SendQ exceeded");
 701                 ServerInstance->WriteOpers("*** User %s SendQ of %d exceeds connect class maximum of %d",this->nick,sendq.length() + data.length(),this->sendqmax);
 702                 return;
 703         }
 704
 705         try
 706         {
 707                 if (data.length() > MAXBUF - 2) /* MAXBUF has a value of 514, to account for line terminators */
 708                         sendq.append(data.substr(0,MAXBUF - 4)).append("\r\n"); /* MAXBUF-4 = 510 */
 709                 else
 710                         sendq.append(data);
 711         }
 712         catch (...)
 713         {
 714                 this->SetWriteError("SendQ exceeded");
 715                 ServerInstance->WriteOpers("*** User %s SendQ got an exception",this->nick);
 716         }
 717 }
 718
 719 // send AS MUCH OF THE USERS SENDQ as we are able to (might not be all of it)
 720 void userrec::FlushWriteBuf()
 721 {
 722         try
 723         {
 724                 if ((this->fd == FD_MAGIC_NUMBER) || (*this->GetWriteError()))
 725                 {
 726                         sendq.clear();
 727                 }
 728                 if ((sendq.length()) && (this->fd != FD_MAGIC_NUMBER))
 729                 {
 730                         int old_sendq_length = sendq.length();
 731                         int n_sent = ServerInstance->SE->Send(this, this->sendq.data(), this->sendq.length(), 0);
 732
 733                         if (n_sent == -1)
 734                         {
 735                                 if (errno == EAGAIN)
 736                                 {
 737                                         /* The socket buffer is full. This isnt fatal,
 738                                          * try again later.
 739                                          */
 740                                         this->ServerInstance->SE->WantWrite(this);
 741                                 }
 742                                 else
 743                                 {
 744                                         /* Fatal error, set write error and bail
 745                                          */
 746                                         this->SetWriteError(errno ? strerror(errno) : "EOF from client");
 747                                         return;
 748                                 }
 749                         }
 750                         else
 751                         {
 752                                 /* advance the queue */
 753                                 if (n_sent)
 754                                         this->sendq = this->sendq.substr(n_sent);
 755                                 /* update the user's stats counters */
 756                                 this->bytes_out += n_sent;
 757                                 this->cmds_out++;
 758                                 if (n_sent != old_sendq_length)
 759                                         this->ServerInstance->SE->WantWrite(this);
 760                         }
 761                 }
 762         }
 763
 764         catch (...)
 765         {
 766                 ServerInstance->Log(DEBUG,"Exception in userrec::FlushWriteBuf()");
 767         }
 768
 769         if (this->sendq.empty())
 770         {
 771                 FOREACH_MOD(I_OnBufferFlushed,OnBufferFlushed(this));
 772         }
 773 }
 774
 775 void userrec::SetWriteError(const std::string &error)
 776 {
 777         try
 778         {
 779                 // don't try to set the error twice, its already set take the first string.
 780                 if (this->WriteError.empty())
 781                         this->WriteError = error;
 782         }
 783
 784         catch (...)
 785         {
 786                 ServerInstance->Log(DEBUG,"Exception in userrec::SetWriteError()");
 787         }
 788 }
 789
 790 const char* userrec::GetWriteError()
 791 {
 792         return this->WriteError.c_str();
 793 }
 794
 795 void userrec::Oper(const std::string &opertype)
 796 {
 797         try
 798         {
 799                 this->modes[UM_OPERATOR] = 1;
 800                 this->WriteServ("MODE %s :+o", this->nick);
 801                 FOREACH_MOD(I_OnOper, OnOper(this, opertype));
 802                 ServerInstance->Log(DEFAULT,"OPER: %s!%s@%s opered as type: %s", this->nick, this->ident, this->host, opertype.c_str());
 803                 strlcpy(this->oper, opertype.c_str(), NICKMAX - 1);
 804                 ServerInstance->all_opers.push_back(this);
 805                 FOREACH_MOD(I_OnPostOper,OnPostOper(this, opertype));
 806         }
 807
 808         catch (...)
 809         {
 810                 ServerInstance->Log(DEBUG,"Exception in userrec::Oper()");
 811         }
 812 }
 813
 814 void userrec::UnOper()
 815 {
 816         try
 817         {
 818                 if (IS_OPER(this))
 819                 {
 820                         // unset their oper type (what IS_OPER checks), and remove +o
 821                         *this->oper = 0;
 822                         this->modes[UM_OPERATOR] = 0;
 823
 824                         // remove them from the opers list.
 825                         for (std::vector<userrec*>::iterator a = ServerInstance->all_opers.begin(); a < ServerInstance->all_opers.end(); a++)
 826                         {
 827                                 if (*a == this)
 828                                 {
 829                                         ServerInstance->all_opers.erase(a);
 830                                         return;
 831                                 }
 832                         }
 833                 }
 834         }
 835
 836         catch (...)
 837         {
 838                 ServerInstance->Log(DEBUG,"Exception in userrec::UnOper()");
 839         }
 840 }
 841
 842 void userrec::QuitUser(InspIRCd* Instance, userrec *user, const std::string &quitreason, const char* operreason)
 843 {
 844         user->muted = true;
 845         Instance->GlobalCulls.AddItem(user, quitreason.c_str(), operreason);
 846 }
 847
 848 /* adds or updates an entry in the whowas list */
 849 void userrec::AddToWhoWas()
 850 {
 851         command_t* whowas_command = ServerInstance->Parser->GetHandler("WHOWAS");
 852         if (whowas_command)
 853         {
 854                 std::deque<classbase*> params;
 855                 params.push_back(this);
 856                 whowas_command->HandleInternal(WHOWAS_ADD, params);
 857         }
 858 }
 859
 860 /* add a client connection to the sockets list */
 861 void userrec::AddClient(InspIRCd* Instance, int socket, int port, bool iscached, int socketfamily, sockaddr* ip)
 862 {
 863         userrec* New = new userrec(Instance);
 864
 865         user_hash::iterator iter = Instance->clientlist->find(New->uuid);
 866         char ipaddr[MAXBUF];
 867 #ifdef IPV6
 868         if (socketfamily == AF_INET6)
 869                 inet_ntop(AF_INET6, &((const sockaddr_in6*)ip)->sin6_addr, ipaddr, sizeof(ipaddr));
 870         else
 871 #endif
 872         inet_ntop(AF_INET, &((const sockaddr_in*)ip)->sin_addr, ipaddr, sizeof(ipaddr));
 873         userrec* New;
 874         int j = 0;
 875
 876         Instance->unregistered_count++;
 877
 878         (*(Instance->clientlist))[user->uuid] = New;
 879         New->fd = socket;
 880         strlcpy(New->nick, New->uuid, NICKMAX - 1);
 881
 882         New->server = Instance->FindServerNamePtr(Instance->Config->ServerName);
 883         /* We don't need range checking here, we KNOW 'unknown\0' will fit into the ident field. */
 884         strcpy(New->ident, "unknown");
 885
 886         New->registered = REG_NONE;
 887         New->signon = Instance->Time() + Instance->Config->dns_timeout;
 888         New->lastping = 1;
 889
 890         New->SetSockAddr(socketfamily, ipaddr, port);
 891
 892         /* Smarter than your average bear^H^H^H^Hset of strlcpys. */
 893         for (const char* temp = New->GetIPString(); *temp && j < 64; temp++, j++)
 894                 New->dhost[j] = New->host[j] = *temp;
 895         New->dhost[j] = New->host[j] = 0;
 896
 897         Instance->AddLocalClone(New);
 898         Instance->AddGlobalClone(New);
 899
 900         /*
 901          * First class check. We do this again in FullConnect after DNS is done, and NICK/USER is recieved.
 902          * See my note down there for why this is required. DO NOT REMOVE. :) -- w00t
 903          */
 904         ConnectClass* i = New->GetClass();
 905
 906         if (!i)
 907         {
 908                 userrec::QuitUser(Instance, New, "Access denied by configuration");
 909                 return;
 910         }
 911
 912         /*
 913          * Check connect class settings and initialise settings into userrec.
 914          * This will be done again after DNS resolution. -- w00t
 915          */
 916         New->CheckClass();
 917
 918         Instance->local_users.push_back(New);
 919
 920         if ((Instance->local_users.size() > Instance->Config->SoftLimit) || (Instance->local_users.size() >= MAXCLIENTS))
 921         {
 922                 Instance->WriteOpers("*** Warning: softlimit value has been reached: %d clients", Instance->Config->SoftLimit);
 923                 userrec::QuitUser(Instance, New,"No more connections allowed");
 924                 return;
 925         }
 926
 927         /*
 928          * XXX -
 929          * this is done as a safety check to keep the file descriptors within range of fd_ref_table.
 930          * its a pretty big but for the moment valid assumption:
 931          * file descriptors are handed out starting at 0, and are recycled as theyre freed.
 932          * therefore if there is ever an fd over 65535, 65536 clients must be connected to the
 933          * irc server at once (or the irc server otherwise initiating this many connections, files etc)
 934          * which for the time being is a physical impossibility (even the largest networks dont have more
 935          * than about 10,000 users on ONE server!)
 936          */
 937 #ifndef WINDOWS
 938         if ((unsigned int)socket >= MAX_DESCRIPTORS)
 939         {
 940                 userrec::QuitUser(Instance, New, "Server is full");
 941                 return;
 942         }
 943 #endif
 944
 945         New->exempt = (Instance->XLines->matches_exception(New) != NULL);
 946         if (!New->exempt)
 947         {
 948                 ZLine* r = Instance->XLines->matches_zline(ipaddr);
 949                 if (r)
 950                 {
 951                         char reason[MAXBUF];
 952                         if (*Instance->Config->MoronBanner)
 953                                 New->WriteServ("NOTICE %s :*** %s", New->nick, Instance->Config->MoronBanner);
 954                         snprintf(reason,MAXBUF,"Z-Lined: %s",r->reason);
 955                         userrec::QuitUser(Instance, New, reason);
 956                         return;
 957                 }
 958         }
 959
 960         if (socket > -1)
 961         {
 962                 if (!Instance->SE->AddFd(New))
 963                 {
 964                         userrec::QuitUser(Instance, New, "Internal error handling connection");
 965                         return;
 966                 }
 967         }
 968
 969         /* NOTE: even if dns lookups are *off*, we still need to display this.
 970          * BOPM and other stuff requires it.
 971          */
 972         New->WriteServ("NOTICE Auth :*** Looking up your hostname...");
 973 }
 974
 975 unsigned long userrec::GlobalCloneCount()
 976 {
 977         clonemap::iterator x = ServerInstance->global_clones.find(this->GetIPString());
 978         if (x != ServerInstance->global_clones.end())
 979                 return x->second;
 980         else
 981                 return 0;
 982 }
 983
 984 unsigned long userrec::LocalCloneCount()
 985 {
 986         clonemap::iterator x = ServerInstance->local_clones.find(this->GetIPString());
 987         if (x != ServerInstance->local_clones.end())
 988                 return x->second;
 989         else
 990                 return 0;
 991 }
 992
 993 /*
 994  * Check class restrictions
 995  */
 996 void userrec::CheckClass(const std::string &explicit_class)
 997 {
 998         ConnectClass* a = this->GetClass(explicit_class);
 999
1000         if ((!a) || (a->GetType() == CC_DENY))
1001         {
1002                 userrec::QuitUser(ServerInstance, this, "Unauthorised connection");
1003                 return;
1004         }
1005         else if ((a->GetMaxLocal()) && (this->LocalCloneCount() > a->GetMaxLocal()))
1006         {
1007                 userrec::QuitUser(ServerInstance, this, "No more connections allowed from your host via this connect class (local)");
1008                 ServerInstance->WriteOpers("*** WARNING: maximum LOCAL connections (%ld) exceeded for IP %s", a->GetMaxLocal(), this->GetIPString());
1009                 return;
1010         }
1011         else if ((a->GetMaxGlobal()) && (this->GlobalCloneCount() > a->GetMaxGlobal()))
1012         {
1013                 userrec::QuitUser(ServerInstance, this, "No more connections allowed from your host via this connect class (global)");
1014                 ServerInstance->WriteOpers("*** WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s", a->GetMaxGlobal(), this->GetIPString());
1015                 return;
1016         }
1017
1018         this->pingmax = a->GetPingTime();
1019         this->nping = ServerInstance->Time() + a->GetPingTime() + ServerInstance->Config->dns_timeout;
1020         this->timeout = ServerInstance->Time() + a->GetRegTimeout();
1021         this->flood = a->GetFlood();
1022         this->threshold = a->GetThreshold();
1023         this->sendqmax = a->GetSendqMax();
1024         this->recvqmax = a->GetRecvqMax();
1025         this->MaxChans = a->GetMaxChans();
1026 }
1027
1028 void userrec::FullConnect()
1029 {
1030         ServerInstance->stats->statsConnects++;
1031         this->idle_lastmsg = ServerInstance->Time();
1032
1033         /*
1034          * You may be thinking "wtf, we checked this in userrec::AddClient!" - and yes, we did, BUT.
1035          * At the time AddClient is called, we don't have a resolved host, by here we probably do - which
1036          * may put the user into a totally seperate class with different restrictions! so we *must* check again.
1037          * Don't remove this! -- w00t
1038          */
1039         this->CheckClass();
1040
1041         /* Check the password, if one is required by the user's connect class.
1042          * This CANNOT be in CheckClass(), because that is called prior to PASS as well!
1043          */
1044         if ((!this->GetClass()->GetPass().empty()) && (!this->haspassed))
1045         {
1046                 userrec::QuitUser(ServerInstance, this, "Invalid password");
1047                 return;
1048         }
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                         userrec::QuitUser(ServerInstance, 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                         userrec::QuitUser(ServerInstance, 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->WriteServ("042 %s %s :your unique ID", this->nick, this->uuid);
1088
1089
1090         this->ShowMOTD();
1091
1092         /* Now registered */
1093         if (ServerInstance->unregistered_count)
1094                 ServerInstance->unregistered_count--;
1095
1096         /* Trigger LUSERS output, give modules a chance too */
1097         int MOD_RESULT = 0;
1098         FOREACH_RESULT(I_OnPreCommand, OnPreCommand("LUSERS", NULL, 0, this, true, "LUSERS"));
1099         if (!MOD_RESULT)
1100                 ServerInstance->CallCommandHandler("LUSERS", NULL, 0, this);
1101
1102         /*
1103          * fix 3 by brain, move registered = 7 below these so that spurious modes and host
1104          * changes dont go out onto the network and produce 'fake direction'.
1105          */
1106         FOREACH_MOD(I_OnUserConnect,OnUserConnect(this));
1107
1108         this->registered = REG_ALL;
1109
1110         FOREACH_MOD(I_OnPostConnect,OnPostConnect(this));
1111
1112         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);
1113 }
1114
1115 /** userrec::UpdateNick()
1116  * re-allocates a nick in the user_hash after they change nicknames,
1117  * returns a pointer to the new user as it may have moved
1118  */
1119 userrec* userrec::UpdateNickHash(const char* New)
1120 {
1121         try
1122         {
1123                 //user_hash::iterator newnick;
1124                 user_hash::iterator oldnick = ServerInstance->clientlist->find(this->nick);
1125
1126                 if (!strcasecmp(this->nick,New))
1127                         return oldnick->second;
1128
1129                 if (oldnick == ServerInstance->clientlist->end())
1130                         return NULL; /* doesnt exist */
1131
1132                 userrec* olduser = oldnick->second;
1133                 (*(ServerInstance->clientlist))[New] = olduser;
1134                 ServerInstance->clientlist->erase(oldnick);
1135                 return olduser;
1136         }
1137
1138         catch (...)
1139         {
1140                 ServerInstance->Log(DEBUG,"Exception in userrec::UpdateNickHash()");
1141                 return NULL;
1142         }
1143 }
1144
1145 void userrec::InvalidateCache()
1146 {
1147         /* Invalidate cache */
1148         if (cached_fullhost)
1149                 free(cached_fullhost);
1150         if (cached_hostip)
1151                 free(cached_hostip);
1152         if (cached_makehost)
1153                 free(cached_makehost);
1154         if (cached_fullrealhost)
1155                 free(cached_fullrealhost);
1156         cached_fullhost = cached_hostip = cached_makehost = cached_fullrealhost = NULL;
1157 }
1158
1159 bool userrec::ForceNickChange(const char* newnick)
1160 {
1161         try
1162         {
1163                 int MOD_RESULT = 0;
1164
1165                 this->InvalidateCache();
1166
1167                 FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(this, newnick));
1168
1169                 if (MOD_RESULT)
1170                 {
1171                         ServerInstance->stats->statsCollisions++;
1172                         return false;
1173                 }
1174
1175                 if (ServerInstance->XLines->matches_qline(newnick))
1176                 {
1177                         ServerInstance->stats->statsCollisions++;
1178                         return false;
1179                 }
1180
1181                 if (this->registered == REG_ALL)
1182                 {
1183                         std::deque<classbase*> dummy;
1184                         command_t* nickhandler = ServerInstance->Parser->GetHandler("NICK");
1185                         if (nickhandler)
1186                         {
1187                                 nickhandler->HandleInternal(1, dummy);
1188                                 bool result = (ServerInstance->Parser->CallHandler("NICK", &newnick, 1, this) == CMD_SUCCESS);
1189                                 nickhandler->HandleInternal(0, dummy);
1190                                 return result;
1191                         }
1192                 }
1193                 return false;
1194         }
1195
1196         catch (...)
1197         {
1198                 ServerInstance->Log(DEBUG,"Exception in userrec::ForceNickChange()");
1199                 return false;
1200         }
1201 }
1202
1203 void userrec::SetSockAddr(int protocol_family, const char* ip, int port)
1204 {
1205         switch (protocol_family)
1206         {
1207 #ifdef SUPPORT_IP6LINKS
1208                 case AF_INET6:
1209                 {
1210                         sockaddr_in6* sin = new sockaddr_in6;
1211                         sin->sin6_family = AF_INET6;
1212                         sin->sin6_port = port;
1213                         inet_pton(AF_INET6, ip, &sin->sin6_addr);
1214                         this->ip = (sockaddr*)sin;
1215                 }
1216                 break;
1217 #endif
1218                 case AF_INET:
1219                 {
1220                         sockaddr_in* sin = new sockaddr_in;
1221                         sin->sin_family = AF_INET;
1222                         sin->sin_port = port;
1223                         inet_pton(AF_INET, ip, &sin->sin_addr);
1224                         this->ip = (sockaddr*)sin;
1225                 }
1226                 break;
1227                 default:
1228                         ServerInstance->Log(DEBUG,"Ut oh, I dont know protocol %d to be set on '%s'!", protocol_family, this->nick);
1229                 break;
1230         }
1231 }
1232
1233 int userrec::GetPort()
1234 {
1235         if (this->ip == NULL)
1236                 return 0;
1237
1238         switch (this->GetProtocolFamily())
1239         {
1240 #ifdef SUPPORT_IP6LINKS
1241                 case AF_INET6:
1242                 {
1243                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1244                         return sin->sin6_port;
1245                 }
1246                 break;
1247 #endif
1248                 case AF_INET:
1249                 {
1250                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1251                         return sin->sin_port;
1252                 }
1253                 break;
1254                 default:
1255                 break;
1256         }
1257         return 0;
1258 }
1259
1260 int userrec::GetProtocolFamily()
1261 {
1262         if (this->ip == NULL)
1263                 return 0;
1264
1265         sockaddr_in* sin = (sockaddr_in*)this->ip;
1266         return sin->sin_family;
1267 }
1268
1269 const char* userrec::GetIPString()
1270 {
1271         static char buf[1024];
1272
1273         if (this->ip == NULL)
1274                 return "";
1275
1276         switch (this->GetProtocolFamily())
1277         {
1278 #ifdef SUPPORT_IP6LINKS
1279                 case AF_INET6:
1280                 {
1281                         static char temp[1024];
1282
1283                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1284                         inet_ntop(sin->sin6_family, &sin->sin6_addr, buf, sizeof(buf));
1285                         /* IP addresses starting with a : on irc are a Bad Thing (tm) */
1286                         if (*buf == ':')
1287                         {
1288                                 strlcpy(&temp[1], buf, sizeof(temp) - 1);
1289                                 *temp = '0';
1290                                 return temp;
1291                         }
1292                         return buf;
1293                 }
1294                 break;
1295 #endif
1296                 case AF_INET:
1297                 {
1298                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1299                         inet_ntop(sin->sin_family, &sin->sin_addr, buf, sizeof(buf));
1300                         return buf;
1301                 }
1302                 break;
1303                 default:
1304                 break;
1305         }
1306         return "";
1307 }
1308
1309 const char* userrec::GetIPString(char* buf)
1310 {
1311         if (this->ip == NULL)
1312         {
1313                 *buf = 0;
1314                 return buf;
1315         }
1316
1317         switch (this->GetProtocolFamily())
1318         {
1319 #ifdef SUPPORT_IP6LINKS
1320                 case AF_INET6:
1321                 {
1322                         static char temp[1024];
1323
1324                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1325                         inet_ntop(sin->sin6_family, &sin->sin6_addr, buf, sizeof(buf));
1326                         /* IP addresses starting with a : on irc are a Bad Thing (tm) */
1327                         if (*buf == ':')
1328                         {
1329                                 strlcpy(&temp[1], buf, sizeof(temp) - 1);
1330                                 *temp = '0';
1331                                 strlcpy(buf, temp, sizeof(temp));
1332                         }
1333                         return buf;
1334                 }
1335                 break;
1336 #endif
1337                 case AF_INET:
1338                 {
1339                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1340                         inet_ntop(sin->sin_family, &sin->sin_addr, buf, sizeof(buf));
1341                         return buf;
1342                 }
1343                 break;
1344
1345                 default:
1346                 break;
1347         }
1348         return "";
1349 }
1350
1351 /** NOTE: We cannot pass a const reference to this method.
1352  * The string is changed by the workings of the method,
1353  * so that if we pass const ref, we end up copying it to
1354  * something we can change anyway. Makes sense to just let
1355  * the compiler do that copy for us.
1356  */
1357 void userrec::Write(std::string text)
1358 {
1359         if (!ServerInstance->SE->BoundsCheckFd(this))
1360                 return;
1361
1362         try
1363         {
1364                 /* ServerInstance->Log(DEBUG,"C[%d] <- %s", this->GetFd(), text.c_str());
1365                  * WARNING: The above debug line is VERY loud, do NOT
1366                  * enable it till we have a good way of filtering it
1367                  * out of the logs (e.g. 1.2 would be good).
1368                  */
1369                 text.append("\r\n");
1370         }
1371         catch (...)
1372         {
1373                 ServerInstance->Log(DEBUG,"Exception in userrec::Write() std::string::append");
1374                 return;
1375         }
1376
1377         if (ServerInstance->Config->GetIOHook(this->GetPort()))
1378         {
1379                 try
1380                 {
1381                         /* XXX: The lack of buffering here is NOT a bug, modules implementing this interface have to
1382                          * implement their own buffering mechanisms
1383                          */
1384                         ServerInstance->Config->GetIOHook(this->GetPort())->OnRawSocketWrite(this->fd, text.data(), text.length());
1385                 }
1386                 catch (CoreException& modexcept)
1387                 {
1388                         ServerInstance->Log(DEBUG, "%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
1389                 }
1390         }
1391         else
1392         {
1393                 this->AddWriteBuf(text);
1394         }
1395         ServerInstance->stats->statsSent += text.length();
1396         this->ServerInstance->SE->WantWrite(this);
1397 }
1398
1399 /** Write()
1400  */
1401 void userrec::Write(const char *text, ...)
1402 {
1403         va_list argsPtr;
1404         char textbuffer[MAXBUF];
1405
1406         va_start(argsPtr, text);
1407         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1408         va_end(argsPtr);
1409
1410         this->Write(std::string(textbuffer));
1411 }
1412
1413 void userrec::WriteServ(const std::string& text)
1414 {
1415         char textbuffer[MAXBUF];
1416
1417         snprintf(textbuffer,MAXBUF,":%s %s",ServerInstance->Config->ServerName,text.c_str());
1418         this->Write(std::string(textbuffer));
1419 }
1420
1421 /** WriteServ()
1422  *  Same as Write(), except `text' is prefixed with `:server.name '.
1423  */
1424 void userrec::WriteServ(const char* text, ...)
1425 {
1426         va_list argsPtr;
1427         char textbuffer[MAXBUF];
1428
1429         va_start(argsPtr, text);
1430         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1431         va_end(argsPtr);
1432
1433         this->WriteServ(std::string(textbuffer));
1434 }
1435
1436
1437 void userrec::WriteFrom(userrec *user, const std::string &text)
1438 {
1439         char tb[MAXBUF];
1440
1441         snprintf(tb,MAXBUF,":%s %s",user->GetFullHost(),text.c_str());
1442
1443         this->Write(std::string(tb));
1444 }
1445
1446
1447 /* write text from an originating user to originating user */
1448
1449 void userrec::WriteFrom(userrec *user, const char* text, ...)
1450 {
1451         va_list argsPtr;
1452         char textbuffer[MAXBUF];
1453
1454         va_start(argsPtr, text);
1455         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1456         va_end(argsPtr);
1457
1458         this->WriteFrom(user, std::string(textbuffer));
1459 }
1460
1461
1462 /* write text to an destination user from a source user (e.g. user privmsg) */
1463
1464 void userrec::WriteTo(userrec *dest, const char *data, ...)
1465 {
1466         char textbuffer[MAXBUF];
1467         va_list argsPtr;
1468
1469         va_start(argsPtr, data);
1470         vsnprintf(textbuffer, MAXBUF, data, argsPtr);
1471         va_end(argsPtr);
1472
1473         this->WriteTo(dest, std::string(textbuffer));
1474 }
1475
1476 void userrec::WriteTo(userrec *dest, const std::string &data)
1477 {
1478         dest->WriteFrom(this, data);
1479 }
1480
1481
1482 void userrec::WriteCommon(const char* text, ...)
1483 {
1484         char textbuffer[MAXBUF];
1485         va_list argsPtr;
1486
1487         if (this->registered != REG_ALL)
1488                 return;
1489
1490         va_start(argsPtr, text);
1491         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1492         va_end(argsPtr);
1493
1494         this->WriteCommon(std::string(textbuffer));
1495 }
1496
1497 void userrec::WriteCommon(const std::string &text)
1498 {
1499         try
1500         {
1501                 bool sent_to_at_least_one = false;
1502                 char tb[MAXBUF];
1503
1504                 if (this->registered != REG_ALL)
1505                         return;
1506
1507                 uniq_id++;
1508
1509                 /* We dont want to be doing this n times, just once */
1510                 snprintf(tb,MAXBUF,":%s %s",this->GetFullHost(),text.c_str());
1511                 std::string out = tb;
1512
1513                 for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1514                 {
1515                         CUList* ulist = v->first->GetUsers();
1516                         for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1517                         {
1518                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1519                                 {
1520                                         already_sent[i->first->fd] = uniq_id;
1521                                         i->first->Write(out);
1522                                         sent_to_at_least_one = true;
1523                                 }
1524                         }
1525                 }
1526
1527                 /*
1528                  * if the user was not in any channels, no users will receive the text. Make sure the user
1529                  * receives their OWN message for WriteCommon
1530                  */
1531                 if (!sent_to_at_least_one)
1532                 {
1533                         this->Write(std::string(tb));
1534                 }
1535         }
1536
1537         catch (...)
1538         {
1539                 ServerInstance->Log(DEBUG,"Exception in userrec::WriteCommon()");
1540         }
1541 }
1542
1543
1544 /* write a formatted string to all users who share at least one common
1545  * channel, NOT including the source user e.g. for use in QUIT
1546  */
1547
1548 void userrec::WriteCommonExcept(const char* text, ...)
1549 {
1550         char textbuffer[MAXBUF];
1551         va_list argsPtr;
1552
1553         va_start(argsPtr, text);
1554         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1555         va_end(argsPtr);
1556
1557         this->WriteCommonExcept(std::string(textbuffer));
1558 }
1559
1560 void userrec::WriteCommonQuit(const std::string &normal_text, const std::string &oper_text)
1561 {
1562         char tb1[MAXBUF];
1563         char tb2[MAXBUF];
1564
1565         if (this->registered != REG_ALL)
1566                 return;
1567
1568         uniq_id++;
1569         snprintf(tb1,MAXBUF,":%s QUIT :%s",this->GetFullHost(),normal_text.c_str());
1570         snprintf(tb2,MAXBUF,":%s QUIT :%s",this->GetFullHost(),oper_text.c_str());
1571         std::string out1 = tb1;
1572         std::string out2 = tb2;
1573
1574         for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1575         {
1576                 CUList *ulist = v->first->GetUsers();
1577                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1578                 {
1579                         if (this != i->first)
1580                         {
1581                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1582                                 {
1583                                         already_sent[i->first->fd] = uniq_id;
1584                                         i->first->Write(IS_OPER(i->first) ? out2 : out1);
1585                                 }
1586                         }
1587                 }
1588         }
1589 }
1590
1591 void userrec::WriteCommonExcept(const std::string &text)
1592 {
1593         char tb1[MAXBUF];
1594         std::string out1;
1595
1596         if (this->registered != REG_ALL)
1597                 return;
1598
1599         uniq_id++;
1600         snprintf(tb1,MAXBUF,":%s %s",this->GetFullHost(),text.c_str());
1601         out1 = tb1;
1602
1603         for (UCListIter v = this->chans.begin(); v != this->chans.end(); v++)
1604         {
1605                 CUList *ulist = v->first->GetUsers();
1606                 for (CUList::iterator i = ulist->begin(); i != ulist->end(); i++)
1607                 {
1608                         if (this != i->first)
1609                         {
1610                                 if ((IS_LOCAL(i->first)) && (already_sent[i->first->fd] != uniq_id))
1611                                 {
1612                                         already_sent[i->first->fd] = uniq_id;
1613                                         i->first->Write(out1);
1614                                 }
1615                         }
1616                 }
1617         }
1618
1619 }
1620
1621 void userrec::WriteWallOps(const std::string &text)
1622 {
1623         if (!IS_OPER(this) && IS_LOCAL(this))
1624                 return;
1625
1626         std::string wallop("WALLOPS :");
1627         wallop.append(text);
1628
1629         for (std::vector<userrec*>::const_iterator i = ServerInstance->local_users.begin(); i != ServerInstance->local_users.end(); i++)
1630         {
1631                 userrec* t = *i;
1632                 if (t->IsModeSet('w'))
1633                         this->WriteTo(t,wallop);
1634         }
1635 }
1636
1637 void userrec::WriteWallOps(const char* text, ...)
1638 {
1639         char textbuffer[MAXBUF];
1640         va_list argsPtr;
1641
1642         va_start(argsPtr, text);
1643         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1644         va_end(argsPtr);
1645
1646         this->WriteWallOps(std::string(textbuffer));
1647 }
1648
1649 /* return 0 or 1 depending if users u and u2 share one or more common channels
1650  * (used by QUIT, NICK etc which arent channel specific notices)
1651  *
1652  * The old algorithm in 1.0 for this was relatively inefficient, iterating over
1653  * the first users channels then the second users channels within the outer loop,
1654  * therefore it was a maximum of x*y iterations (upon returning 0 and checking
1655  * all possible iterations). However this new function instead checks against the
1656  * channel's userlist in the inner loop which is a std::map<userrec*,userrec*>
1657  * and saves us time as we already know what pointer value we are after.
1658  * Don't quote me on the maths as i am not a mathematician or computer scientist,
1659  * but i believe this algorithm is now x+(log y) maximum iterations instead.
1660  */
1661 bool userrec::SharesChannelWith(userrec *other)
1662 {
1663         if ((!other) || (this->registered != REG_ALL) || (other->registered != REG_ALL))
1664                 return false;
1665
1666         /* Outer loop */
1667         for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1668         {
1669                 /* Eliminate the inner loop (which used to be ~equal in size to the outer loop)
1670                  * by replacing it with a map::find which *should* be more efficient
1671                  */
1672                 if (i->first->HasUser(other))
1673                         return true;
1674         }
1675         return false;
1676 }
1677
1678 bool userrec::ChangeName(const char* gecos)
1679 {
1680         if (!strcmp(gecos, this->fullname))
1681                 return true;
1682
1683         if (IS_LOCAL(this))
1684         {
1685                 int MOD_RESULT = 0;
1686                 FOREACH_RESULT(I_OnChangeLocalUserGECOS,OnChangeLocalUserGECOS(this,gecos));
1687                 if (MOD_RESULT)
1688                         return false;
1689                 FOREACH_MOD(I_OnChangeName,OnChangeName(this,gecos));
1690         }
1691         strlcpy(this->fullname,gecos,MAXGECOS+1);
1692
1693         return true;
1694 }
1695
1696 bool userrec::ChangeDisplayedHost(const char* host)
1697 {
1698         if (!strcmp(host, this->dhost))
1699                 return true;
1700
1701         if (IS_LOCAL(this))
1702         {
1703                 int MOD_RESULT = 0;
1704                 FOREACH_RESULT(I_OnChangeLocalUserHost,OnChangeLocalUserHost(this,host));
1705                 if (MOD_RESULT)
1706                         return false;
1707                 FOREACH_MOD(I_OnChangeHost,OnChangeHost(this,host));
1708         }
1709         if (this->ServerInstance->Config->CycleHosts)
1710                 this->WriteCommonExcept("QUIT :Changing hosts");
1711
1712         /* Fix by Om: userrec::dhost is 65 long, this was truncating some long hosts */
1713         strlcpy(this->dhost,host,64);
1714
1715         this->InvalidateCache();
1716
1717         if (this->ServerInstance->Config->CycleHosts)
1718         {
1719                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1720                 {
1721                         i->first->WriteAllExceptSender(this, false, 0, "JOIN %s", i->first->name);
1722                         std::string n = this->ServerInstance->Modes->ModeString(this, i->first);
1723                         if (n.length() > 0)
1724                                 i->first->WriteAllExceptSender(this, true, 0, "MODE %s +%s", i->first->name, n.c_str());
1725                 }
1726         }
1727
1728         if (IS_LOCAL(this))
1729                 this->WriteServ("396 %s %s :is now your displayed host",this->nick,this->dhost);
1730
1731         return true;
1732 }
1733
1734 bool userrec::ChangeIdent(const char* newident)
1735 {
1736         if (!strcmp(newident, this->ident))
1737                 return true;
1738
1739         if (this->ServerInstance->Config->CycleHosts)
1740                 this->WriteCommonExcept("%s","QUIT :Changing ident");
1741
1742         strlcpy(this->ident, newident, IDENTMAX+2);
1743
1744         this->InvalidateCache();
1745
1746         if (this->ServerInstance->Config->CycleHosts)
1747         {
1748                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1749                 {
1750                         i->first->WriteAllExceptSender(this, false, 0, "JOIN %s", i->first->name);
1751                         std::string n = this->ServerInstance->Modes->ModeString(this, i->first);
1752                         if (n.length() > 0)
1753                                 i->first->WriteAllExceptSender(this, true, 0, "MODE %s +%s", i->first->name, n.c_str());
1754                 }
1755         }
1756
1757         return true;
1758 }
1759
1760 void userrec::SendAll(const char* command, char* text, ...)
1761 {
1762         char textbuffer[MAXBUF];
1763         char formatbuffer[MAXBUF];
1764         va_list argsPtr;
1765
1766         va_start(argsPtr, text);
1767         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
1768         va_end(argsPtr);
1769
1770         snprintf(formatbuffer,MAXBUF,":%s %s $* :%s", this->GetFullHost(), command, textbuffer);
1771         std::string fmt = formatbuffer;
1772
1773         for (std::vector<userrec*>::const_iterator i = ServerInstance->local_users.begin(); i != ServerInstance->local_users.end(); i++)
1774         {
1775                 (*i)->Write(fmt);
1776         }
1777 }
1778
1779
1780 std::string userrec::ChannelList(userrec* source)
1781 {
1782         try
1783         {
1784                 std::string list;
1785                 for (UCListIter i = this->chans.begin(); i != this->chans.end(); i++)
1786                 {
1787                         /* If the target is the same as the sender, let them see all their channels.
1788                          * If the channel is NOT private/secret OR the user shares a common channel
1789                          * If the user is an oper, and the <options:operspywhois> option is set.
1790                          */
1791                         if ((source == this) || (IS_OPER(source) && ServerInstance->Config->OperSpyWhois) || (((!i->first->IsModeSet('p')) && (!i->first->IsModeSet('s'))) || (i->first->HasUser(source))))
1792                         {
1793                                 list.append(i->first->GetPrefixChar(this)).append(i->first->name).append(" ");
1794                         }
1795                 }
1796                 return list;
1797         }
1798         catch (...)
1799         {
1800                 ServerInstance->Log(DEBUG,"Exception in userrec::ChannelList()");
1801                 return "";
1802         }
1803 }
1804
1805 void userrec::SplitChanList(userrec* dest, const std::string &cl)
1806 {
1807         std::string line;
1808         std::ostringstream prefix;
1809         std::string::size_type start, pos, length;
1810
1811         try
1812         {
1813                 prefix << this->nick << " " << dest->nick << " :";
1814                 line = prefix.str();
1815                 int namelen = strlen(ServerInstance->Config->ServerName) + 6;
1816
1817                 for (start = 0; (pos = cl.find(' ', start)) != std::string::npos; start = pos+1)
1818                 {
1819                         length = (pos == std::string::npos) ? cl.length() : pos;
1820
1821                         if (line.length() + namelen + length - start > 510)
1822                         {
1823                                 ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1824                                 line = prefix.str();
1825                         }
1826
1827                         if(pos == std::string::npos)
1828                         {
1829                                 line.append(cl.substr(start, length - start));
1830                                 break;
1831                         }
1832                         else
1833                         {
1834                                 line.append(cl.substr(start, length - start + 1));
1835                         }
1836                 }
1837
1838                 if (line.length())
1839                 {
1840                         ServerInstance->SendWhoisLine(this, dest, 319, "%s", line.c_str());
1841                 }
1842         }
1843
1844         catch (...)
1845         {
1846                 ServerInstance->Log(DEBUG,"Exception in userrec::SplitChanList()");
1847         }
1848 }
1849
1850 unsigned int userrec::GetMaxChans()
1851 {
1852         return this->MaxChans;
1853 }
1854
1855 /* looks up a users password for their connection class (<ALLOW>/<DENY> tags)
1856  * NOTE: If the <ALLOW> or <DENY> tag specifies an ip, and this user resolves,
1857  * then their ip will be taken as 'priority' anyway, so for example,
1858  * <connect allow="127.0.0.1"> will match joe!bloggs@localhost
1859  */
1860 ConnectClass* userrec::GetClass(const std::string &explicit_name)
1861 {
1862         if (!explicit_name.empty())
1863         {
1864                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1865                 {
1866                         if (explicit_name == i->GetName())
1867                                 return &(*i);
1868                 }
1869         }
1870         else
1871         {
1872                 for (ClassVector::iterator i = ServerInstance->Config->Classes.begin(); i != ServerInstance->Config->Classes.end(); i++)
1873                 {
1874                         if (((match(this->GetIPString(),i->GetHost().c_str(),true)) || (match(this->host,i->GetHost().c_str()))))
1875                         {
1876                                 if (i->GetPort())
1877                                 {
1878                                         if (this->GetPort() == i->GetPort())
1879                                                 return &(*i);
1880                                         else
1881                                                 continue;
1882                                 }
1883                                 else
1884                                         return &(*i);
1885                         }
1886                 }
1887         }
1888         return NULL;
1889 }
1890
1891 void userrec::PurgeEmptyChannels()
1892 {
1893         std::vector<chanrec*> to_delete;
1894
1895         // firstly decrement the count on each channel
1896         for (UCListIter f = this->chans.begin(); f != this->chans.end(); f++)
1897         {
1898                 f->first->RemoveAllPrefixes(this);
1899                 if (f->first->DelUser(this) == 0)
1900                 {
1901                         /* No users left in here, mark it for deletion */
1902                         try
1903                         {
1904                                 to_delete.push_back(f->first);
1905                         }
1906                         catch (...)
1907                         {
1908                                 ServerInstance->Log(DEBUG,"Exception in userrec::PurgeEmptyChannels to_delete.push_back()");
1909                         }
1910                 }
1911         }
1912
1913         for (std::vector<chanrec*>::iterator n = to_delete.begin(); n != to_delete.end(); n++)
1914         {
1915                 chanrec* thischan = *n;
1916                 chan_hash::iterator i2 = ServerInstance->chanlist->find(thischan->name);
1917                 if (i2 != ServerInstance->chanlist->end())
1918                 {
1919                         FOREACH_MOD(I_OnChannelDelete,OnChannelDelete(i2->second));
1920                         DELETE(i2->second);
1921                         ServerInstance->chanlist->erase(i2);
1922                         this->chans.erase(*n);
1923                 }
1924         }
1925
1926         this->UnOper();
1927 }
1928
1929 void userrec::ShowMOTD()
1930 {
1931         if (!ServerInstance->Config->MOTD.size())
1932         {
1933                 this->WriteServ("422 %s :Message of the day file is missing.",this->nick);
1934                 return;
1935         }
1936         this->WriteServ("375 %s :%s message of the day", this->nick, ServerInstance->Config->ServerName);
1937
1938         for (file_cache::iterator i = ServerInstance->Config->MOTD.begin(); i != ServerInstance->Config->MOTD.end(); i++)
1939                 this->WriteServ("372 %s :- %s",this->nick,i->c_str());
1940
1941         this->WriteServ("376 %s :End of message of the day.", this->nick);
1942 }
1943
1944 void userrec::ShowRULES()
1945 {
1946         if (!ServerInstance->Config->RULES.size())
1947         {
1948                 this->WriteServ("434 %s :RULES File is missing",this->nick);
1949                 return;
1950         }
1951
1952         this->WriteServ("308 %s :- %s Server Rules -",this->nick,ServerInstance->Config->ServerName);
1953
1954         for (file_cache::iterator i = ServerInstance->Config->RULES.begin(); i != ServerInstance->Config->RULES.end(); i++)
1955                 this->WriteServ("232 %s :- %s",this->nick,i->c_str());
1956
1957         this->WriteServ("309 %s :End of RULES command.",this->nick);
1958 }
1959
1960 void userrec::HandleEvent(EventType et, int errornum)
1961 {
1962         /* WARNING: May delete this user! */
1963         int thisfd = this->GetFd();
1964
1965         try
1966         {
1967                 switch (et)
1968                 {
1969                         case EVENT_READ:
1970                                 ServerInstance->ProcessUser(this);
1971                         break;
1972                         case EVENT_WRITE:
1973                                 this->FlushWriteBuf();
1974                         break;
1975                         case EVENT_ERROR:
1976                                 /** This should be safe, but dont DARE do anything after it -- Brain */
1977                                 this->SetWriteError(errornum ? strerror(errornum) : "EOF from client");
1978                         break;
1979                 }
1980         }
1981         catch (...)
1982         {
1983                 ServerInstance->Log(DEBUG,"Exception in userrec::HandleEvent intercepted");
1984         }
1985
1986         /* If the user has raised an error whilst being processed, quit them now we're safe to */
1987         if ((ServerInstance->SE->GetRef(thisfd) == this))
1988         {
1989                 if (!WriteError.empty())
1990                 {
1991                         userrec::QuitUser(ServerInstance, this, GetWriteError());
1992                 }
1993         }
1994 }
1995
1996 void userrec::SetOperQuit(const std::string &oquit)
1997 {
1998         if (operquit)
1999                 return;
2000
2001         operquit = strdup(oquit.c_str());
2002 }
2003
2004 const char* userrec::GetOperQuit()
2005 {
2006         return operquit ? operquit : "";
2007 }
2008
2009 VisData::VisData()
2010 {
2011 }
2012
2013 VisData::~VisData()
2014 {
2015 }
2016
2017 bool VisData::VisibleTo(userrec* user)
2018 {
2019         return true;
2020 }
2021