src/users.cpp

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