src/users.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
   6  *                       E-mail:
   7  *                <brain@chatspike.net>
   8  *                <Craig@chatspike.net>
   9  *
  10  * Written by Craig Edwards, Craig McLure, and others.
  11  * This program is free but copyrighted software; see
  12  *            the file COPYING for details.
  13  *
  14  * ---------------------------------------------------
  15  */
  16
  17 #include "inspircd_config.h"
  18 #include "configreader.h"
  19 #include "channels.h"
  20 #include "connection.h"
  21 #include "users.h"
  22 #include "inspircd.h"
  23 #include <stdio.h>
  24 #include "inspstring.h"
  25 #include "commands.h"
  26 #include "helperfuncs.h"
  27 #include "typedefs.h"
  28 #include "socketengine.h"
  29 #include "hashcomp.h"
  30 #include "message.h"
  31 #include "wildcard.h"
  32 #include "xline.h"
  33 #include "cull_list.h"
  34
  35 extern InspIRCd* ServerInstance;
  36 extern int WHOWAS_STALE;
  37 extern int WHOWAS_MAX;
  38 extern std::vector<Module*> modules;
  39 extern std::vector<ircd_module*> factory;
  40 extern std::vector<InspSocket*> module_sockets;
  41 extern int MODCOUNT;
  42 extern InspSocket* socket_ref[MAX_DESCRIPTORS];
  43 extern time_t TIME;
  44 extern userrec* fd_ref_table[MAX_DESCRIPTORS];
  45 extern ServerConfig *Config;
  46 extern user_hash clientlist;
  47 extern Server* MyServer;
  48
  49 whowas_users whowas;
  50
  51 extern std::vector<userrec*> local_users;
  52
  53 std::vector<userrec*> all_opers;
  54
  55 typedef std::map<irc::string,char*> opertype_t;
  56 typedef opertype_t operclass_t;
  57
  58 opertype_t opertypes;
  59 operclass_t operclass;
  60
  61 bool InitTypes(const char* tag)
  62 {
  63         for (opertype_t::iterator n = opertypes.begin(); n != opertypes.end(); n++)
  64         {
  65                 if (n->second)
  66                         delete[] n->second;
  67         }
  68
  69         opertypes.clear();
  70         return true;
  71 }
  72
  73 bool InitClasses(const char* tag)
  74 {
  75         for (operclass_t::iterator n = operclass.begin(); n != operclass.end(); n++)
  76         {
  77                 if (n->second)
  78                         delete[] n->second;
  79         }
  80
  81         operclass.clear();
  82         return true;
  83 }
  84
  85 bool DoType(const char* tag, char** entries, void** values, int* types)
  86 {
  87         char* TypeName = (char*)values[0];
  88         char* Classes = (char*)values[1];
  89
  90         opertypes[TypeName] = strdup(Classes);
  91         log(DEBUG,"Read oper TYPE '%s' with classes '%s'",TypeName,Classes);
  92         return true;
  93 }
  94
  95 bool DoClass(const char* tag, char** entries, void** values, int* types)
  96 {
  97         char* ClassName = (char*)values[0];
  98         char* CommandList = (char*)values[1];
  99
 100         operclass[ClassName] = strdup(CommandList);
 101         log(DEBUG,"Read oper CLASS '%s' with commands '%s'",ClassName,CommandList);
 102         return true;
 103 }
 104
 105 bool DoneClassesAndTypes(const char* tag)
 106 {
 107         return true;
 108 }
 109
 110 bool userrec::ProcessNoticeMasks(const char *sm)
 111 {
 112         bool adding = true;
 113         const char *c = sm;
 114
 115         while (c && *c)
 116         {
 117                 switch (*c)
 118                 {
 119                         case '+':
 120                                 adding = true;
 121                                 break;
 122                         case '-':
 123                                 adding = false;
 124                                 break;
 125                         default:
 126                                 if ((*c >= 'A') && (*c <= 'z'))
 127                                         this->SetNoticeMask(*c, adding);
 128                                 break;
 129                 }
 130
 131                 *c++;
 132         }
 133
 134         return true;
 135 }
 136
 137 void userrec::StartDNSLookup()
 138 {
 139         log(DEBUG,"Commencing reverse lookup");
 140         try
 141         {
 142                 res_reverse = new UserResolver(this, insp_ntoa(this->ip4), false);
 143                 MyServer->AddResolver(res_reverse);
 144         }
 145         catch (ModuleException& e)
 146         {
 147                 log(DEBUG,"Error in resolver: %s",e.GetReason());
 148         }
 149 }
 150
 151 UserResolver::UserResolver(userrec* user, std::string to_resolve, bool forward) : Resolver(to_resolve, forward ? DNS_QUERY_FORWARD : DNS_QUERY_REVERSE), bound_user(user)
 152 {
 153         this->fwd = forward;
 154         this->bound_fd = user->fd;
 155 }
 156
 157 void UserResolver::OnLookupComplete(const std::string &result)
 158 {
 159         if ((!this->fwd) && (fd_ref_table[this->bound_fd] == this->bound_user))
 160         {
 161                 log(DEBUG,"Commencing forward lookup");
 162                 this->bound_user->stored_host = result;
 163                 try
 164                 {
 165                         bound_user->res_forward = new UserResolver(this->bound_user, result, true);
 166                         MyServer->AddResolver(bound_user->res_forward);
 167                 }
 168                 catch (ModuleException& e)
 169                 {
 170                         log(DEBUG,"Error in resolver: %s",e.GetReason());
 171                 }
 172         }
 173         else if ((this->fwd) && (fd_ref_table[this->bound_fd] == this->bound_user))
 174         {
 175                 /* Both lookups completed */
 176                 if (insp_ntoa(this->bound_user->ip4) == result)
 177                 {
 178                         std::string hostname = this->bound_user->stored_host;
 179                         if (hostname.length() < 65)
 180                         {
 181                                 WriteServ(this->bound_fd, "NOTICE Auth :*** Found your hostname (%s)", this->bound_user->stored_host.c_str());
 182                                 this->bound_user->dns_done = true;
 183                                 strlcpy(this->bound_user->dhost, hostname.c_str(),64);
 184                                 strlcpy(this->bound_user->host, hostname.c_str(),64);
 185                         }
 186                         else
 187                         {
 188                                 WriteServ(this->bound_fd, "NOTICE Auth :*** Your hostname is longer than the maximum of 64 characters, using your IP address (%s) instead.", insp_ntoa(this->bound_user->ip4));
 189                         }
 190                 }
 191                 else
 192                 {
 193                         WriteServ(this->bound_fd, "NOTICE Auth :*** Your hostname does not match up with your IP address. Sorry, using your IP address (%s) instead.", insp_ntoa(this->bound_user->ip4));
 194                 }
 195         }
 196 }
 197
 198 void UserResolver::OnError(ResolverError e, const std::string &errormessage)
 199 {
 200         if (fd_ref_table[this->bound_fd] == this->bound_user)
 201         {
 202                 /* Error message here */
 203                 WriteServ(this->bound_fd, "NOTICE Auth :*** Could not resolve your hostname, using your IP address (%s) instead.", insp_ntoa(this->bound_user->ip4));
 204                 this->bound_user->dns_done = true;
 205         }
 206 }
 207
 208
 209 bool userrec::IsNoticeMaskSet(unsigned char sm)
 210 {
 211         return (snomasks[sm-65]);
 212 }
 213
 214 void userrec::SetNoticeMask(unsigned char sm, bool value)
 215 {
 216         snomasks[sm-65] = value;
 217 }
 218
 219 const char* userrec::FormatNoticeMasks()
 220 {
 221         static char data[MAXBUF];
 222         int offset = 0;
 223
 224         for (int n = 0; n < 64; n++)
 225         {
 226                 if (snomasks[n])
 227                         data[offset++] = n+65;
 228         }
 229
 230         data[offset] = 0;
 231         return data;
 232 }
 233
 234
 235
 236 bool userrec::IsModeSet(unsigned char m)
 237 {
 238         return (modes[m-65]);
 239 }
 240
 241 void userrec::SetMode(unsigned char m, bool value)
 242 {
 243         modes[m-65] = value;
 244 }
 245
 246 const char* userrec::FormatModes()
 247 {
 248         static char data[MAXBUF];
 249         int offset = 0;
 250         for (int n = 0; n < 64; n++)
 251         {
 252                 if (modes[n])
 253                         data[offset++] = n+65;
 254         }
 255         data[offset] = 0;
 256         return data;
 257 }
 258
 259 userrec::userrec()
 260 {
 261         // the PROPER way to do it, AVOID bzero at *ALL* costs
 262         *password = *nick = *ident = *host = *dhost = *fullname = *awaymsg = *oper = 0;
 263         server = (char*)FindServerNamePtr(Config->ServerName);
 264         reset_due = TIME;
 265         lines_in = fd = lastping = signon = idle_lastmsg = nping = registered = 0;
 266         timeout = flood = port = bytes_in = bytes_out = cmds_in = cmds_out = 0;
 267         haspassed = dns_done = false;
 268         recvq = "";
 269         sendq = "";
 270         res_forward = res_reverse = NULL;
 271         chans.clear();
 272         invites.clear();
 273         chans.resize(MAXCHANS);
 274         memset(modes,0,sizeof(modes));
 275
 276         for (unsigned int n = 0; n < MAXCHANS; n++)
 277         {
 278                 ucrec* x = new ucrec();
 279                 chans[n] = x;
 280                 x->channel = NULL;
 281                 x->uc_modes = 0;
 282         }
 283 }
 284
 285 userrec::~userrec()
 286 {
 287         for (std::vector<ucrec*>::iterator n = chans.begin(); n != chans.end(); n++)
 288         {
 289                 ucrec* x = (ucrec*)*n;
 290                 delete x;
 291         }
 292 }
 293
 294 /* XXX - minor point, other *Host functions return a char *, this one creates it. Might be nice to be consistant? */
 295 void userrec::MakeHost(char* nhost)
 296 {
 297         /* This is much faster than snprintf */
 298         char* t = nhost;
 299         for(char* n = ident; *n; n++)
 300                 *t++ = *n;
 301         *t++ = '@';
 302         for(char* n = host; *n; n++)
 303                 *t++ = *n;
 304         *t = 0;
 305 }
 306
 307 void userrec::CloseSocket()
 308 {
 309         shutdown(this->fd,2);
 310         close(this->fd);
 311 }
 312
 313 char* userrec::GetFullHost()
 314 {
 315         static char result[MAXBUF];
 316         char* t = result;
 317         for(char* n = nick; *n; n++)
 318                 *t++ = *n;
 319         *t++ = '!';
 320         for(char* n = ident; *n; n++)
 321                 *t++ = *n;
 322         *t++ = '@';
 323         for(char* n = dhost; *n; n++)
 324                 *t++ = *n;
 325         *t = 0;
 326         return result;
 327 }
 328
 329 char* userrec::MakeWildHost()
 330 {
 331         static char nresult[MAXBUF];
 332         char* t = nresult;
 333         *t++ = '*';     *t++ = '!';
 334         *t++ = '*';     *t++ = '@';
 335         for(char* n = dhost; *n; n++)
 336                 *t++ = *n;
 337         *t = 0;
 338         return nresult;
 339 }
 340
 341 int userrec::ReadData(void* buffer, size_t size)
 342 {
 343         if (this->fd > -1)
 344         {
 345                 return read(this->fd, buffer, size);
 346         }
 347         else
 348                 return 0;
 349 }
 350
 351
 352 char* userrec::GetFullRealHost()
 353 {
 354         static char fresult[MAXBUF];
 355         char* t = fresult;
 356         for(char* n = nick; *n; n++)
 357                 *t++ = *n;
 358         *t++ = '!';
 359         for(char* n = ident; *n; n++)
 360                 *t++ = *n;
 361         *t++ = '@';
 362         for(char* n = host; *n; n++)
 363                 *t++ = *n;
 364         *t = 0;
 365         return fresult;
 366 }
 367
 368 bool userrec::IsInvited(irc::string &channel)
 369 {
 370         for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 371         {
 372                 irc::string compare = i->channel;
 373
 374                 if (compare == channel)
 375                 {
 376                         return true;
 377                 }
 378         }
 379         return false;
 380 }
 381
 382 InvitedList* userrec::GetInviteList()
 383 {
 384         return &invites;
 385 }
 386
 387 void userrec::InviteTo(irc::string &channel)
 388 {
 389         Invited i;
 390         i.channel = channel;
 391         invites.push_back(i);
 392 }
 393
 394 void userrec::RemoveInvite(irc::string &channel)
 395 {
 396         log(DEBUG,"Removing invites");
 397
 398         if (invites.size())
 399         {
 400                 for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 401                 {
 402                         irc::string compare = i->channel;
 403
 404                         if (compare == channel)
 405                         {
 406                                 invites.erase(i);
 407                                 return;
 408                         }
 409                 }
 410         }
 411 }
 412
 413 bool userrec::HasPermission(const std::string &command)
 414 {
 415         char* mycmd;
 416         char* savept;
 417         char* savept2;
 418
 419         /*
 420          * users on remote servers can completely bypass all permissions based checks.
 421          * This prevents desyncs when one server has different type/class tags to another.
 422          * That having been said, this does open things up to the possibility of source changes
 423          * allowing remote kills, etc - but if they have access to the src, they most likely have
 424          * access to the conf - so it's an end to a means either way.
 425          */
 426         if (!IS_LOCAL(this))
 427                 return true;
 428
 429         // are they even an oper at all?
 430         if (*this->oper)
 431         {
 432                 opertype_t::iterator iter_opertype = opertypes.find(this->oper);
 433                 if (iter_opertype != opertypes.end())
 434                 {
 435                         char* Classes = strdup(iter_opertype->second);
 436                         char* myclass = strtok_r(Classes," ",&savept);
 437                         while (myclass)
 438                         {
 439                                 operclass_t::iterator iter_operclass = operclass.find(myclass);
 440                                 if (iter_operclass != operclass.end())
 441                                 {
 442                                         char* CommandList = strdup(iter_operclass->second);
 443                                         mycmd = strtok_r(CommandList," ",&savept2);
 444                                         while (mycmd)
 445                                         {
 446                                                 if ((!strcasecmp(mycmd,command.c_str())) || (*mycmd == '*'))
 447                                                 {
 448                                                         free(Classes);
 449                                                         free(CommandList);
 450                                                         return true;
 451                                                 }
 452                                                 mycmd = strtok_r(NULL," ",&savept2);
 453                                         }
 454                                         free(CommandList);
 455                                 }
 456                                 myclass = strtok_r(NULL," ",&savept);
 457                         }
 458                         free(Classes);
 459                 }
 460         }
 461         return false;
 462 }
 463
 464
 465 bool userrec::AddBuffer(const std::string &a)
 466 {
 467         std::string b = "";
 468
 469         /* NB: std::string is arsey about \r and \n and tries to translate them
 470          * somehow, so we CANNOT use std::string::find() here :(
 471          */
 472         for (std::string::const_iterator i = a.begin(); i != a.end(); i++)
 473         {
 474                 if (*i != '\r')
 475                         b += *i;
 476         }
 477
 478         if (b.length())
 479                 recvq.append(b);
 480
 481         if (recvq.length() > (unsigned)this->recvqmax)
 482         {
 483                 this->SetWriteError("RecvQ exceeded");
 484                 WriteOpers("*** User %s RecvQ of %d exceeds connect class maximum of %d",this->nick,recvq.length(),this->recvqmax);
 485                 return false;
 486         }
 487
 488         return true;
 489 }
 490
 491 bool userrec::BufferIsReady()
 492 {
 493         return (recvq.find('\n') != std::string::npos);
 494 }
 495
 496 void userrec::ClearBuffer()
 497 {
 498         recvq = "";
 499 }
 500
 501 std::string userrec::GetBuffer()
 502 {
 503         if (!recvq.length())
 504                 return "";
 505
 506         /* Strip any leading \r or \n off the string.
 507          * Usually there are only one or two of these,
 508          * so its is computationally cheap to do.
 509          */
 510         while ((*recvq.begin() == '\r') || (*recvq.begin() == '\n'))
 511                 recvq.erase(recvq.begin());
 512
 513         for (std::string::iterator x = recvq.begin(); x != recvq.end(); x++)
 514         {
 515                 /* Find the first complete line, return it as the
 516                  * result, and leave the recvq as whats left
 517                  */
 518                 if (*x == '\n')
 519                 {
 520                         std::string ret = std::string(recvq.begin(), x);
 521                         recvq.erase(recvq.begin(), x + 1);
 522                         return ret;
 523                 }
 524         }
 525         return "";
 526 }
 527
 528 void userrec::AddWriteBuf(const std::string &data)
 529 {
 530         if (*this->GetWriteError())
 531                 return;
 532
 533         if (sendq.length() + data.length() > (unsigned)this->sendqmax)
 534         {
 535                 /*
 536                  * Fix by brain - Set the error text BEFORE calling writeopers, because
 537                  * if we dont it'll recursively  call here over and over again trying
 538                  * to repeatedly add the text to the sendq!
 539                  */
 540                 this->SetWriteError("SendQ exceeded");
 541                 WriteOpers("*** User %s SendQ of %d exceeds connect class maximum of %d",this->nick,sendq.length() + data.length(),this->sendqmax);
 542                 return;
 543         }
 544
 545         if (data.length() > 512)
 546         {
 547                 std::string newdata(data);
 548                 newdata.resize(510);
 549                 newdata.append("\r\n");
 550                 sendq.append(newdata);
 551         }
 552         else
 553         {
 554                 sendq.append(data);
 555         }
 556 }
 557
 558 // send AS MUCH OF THE USERS SENDQ as we are able to (might not be all of it)
 559 void userrec::FlushWriteBuf()
 560 {
 561         if ((sendq.length()) && (this->fd != FD_MAGIC_NUMBER))
 562         {
 563                 const char* tb = this->sendq.c_str();
 564                 int n_sent = write(this->fd,tb,this->sendq.length());
 565                 if (n_sent == -1)
 566                 {
 567                         if (errno != EAGAIN)
 568                                 this->SetWriteError(strerror(errno));
 569                 }
 570                 else
 571                 {
 572                         // advance the queue
 573                         tb += n_sent;
 574                         this->sendq = tb;
 575                         // update the user's stats counters
 576                         this->bytes_out += n_sent;
 577                         this->cmds_out++;
 578                 }
 579         }
 580 }
 581
 582 void userrec::SetWriteError(const std::string &error)
 583 {
 584         // don't try to set the error twice, its already set take the first string.
 585         if (!this->WriteError.length())
 586         {
 587                 log(DEBUG,"Setting error string for %s to '%s'",this->nick,error.c_str());
 588                 this->WriteError = error;
 589         }
 590 }
 591
 592 const char* userrec::GetWriteError()
 593 {
 594         return this->WriteError.c_str();
 595 }
 596
 597 void AddOper(userrec* user)
 598 {
 599         log(DEBUG,"Oper added to optimization list");
 600         all_opers.push_back(user);
 601 }
 602
 603 void DeleteOper(userrec* user)
 604 {
 605         for (std::vector<userrec*>::iterator a = all_opers.begin(); a < all_opers.end(); a++)
 606         {
 607                 if (*a == user)
 608                 {
 609                         log(DEBUG,"Oper removed from optimization list");
 610                         all_opers.erase(a);
 611                         return;
 612                 }
 613         }
 614 }
 615
 616 void kill_link(userrec *user,const char* r)
 617 {
 618         user_hash::iterator iter = clientlist.find(user->nick);
 619
 620 /*
 621  * I'm pretty sure returning here is causing a desync when part of the net thinks a user is gone,
 622  * and another part doesn't. We want to broadcast the quit/kill before bailing so the net stays in sync.
 623  *
 624  * I can't imagine this blowing up, so I'm commenting it out. We still check
 625  * before playing with a bad iterator below in our if(). DISCUSS THIS BEFORE YOU DO ANYTHING. --w00t
 626  *
 627  *      if (iter == clientlist.end())
 628  *              return;
 629  */
 630
 631         char reason[MAXBUF];
 632
 633         strlcpy(reason,r,MAXQUIT-1);
 634         log(DEBUG,"kill_link: %s %d '%s'",user->nick,user->fd,reason);
 635
 636         if (IS_LOCAL(user))
 637                 Write(user->fd,"ERROR :Closing link (%s@%s) [%s]",user->ident,user->host,reason);
 638
 639         if (user->registered == REG_ALL)
 640         {
 641                 purge_empty_chans(user);
 642                 FOREACH_MOD(I_OnUserQuit,OnUserQuit(user,reason));
 643                 WriteCommonExcept(user,"QUIT :%s",reason);
 644         }
 645
 646         if (IS_LOCAL(user))
 647                 user->FlushWriteBuf();
 648
 649         FOREACH_MOD(I_OnUserDisconnect,OnUserDisconnect(user));
 650
 651         if (IS_LOCAL(user))
 652         {
 653                 if (Config->GetIOHook(user->port))
 654                 {
 655                         try
 656                         {
 657                                 Config->GetIOHook(user->port)->OnRawSocketClose(user->fd);
 658                         }
 659                         catch (ModuleException& modexcept)
 660                         {
 661                                 log(DEBUG,"Module exception cought: %s",modexcept.GetReason());
 662                         }
 663                 }
 664
 665                 ServerInstance->SE->DelFd(user->fd);
 666                 user->CloseSocket();
 667         }
 668
 669         /*
 670          * this must come before the WriteOpers so that it doesnt try to fill their buffer with anything
 671          * if they were an oper with +s.
 672          *
 673          * XXX -
 674          * In the current implementation, we only show local quits, as we only show local connects. With
 675          * the proposed implmentation of snomasks however, this will likely change in the (near?) future.
 676          */
 677         if (user->registered == REG_ALL)
 678         {
 679                 if (IS_LOCAL(user))
 680                         WriteOpers("*** Client exiting: %s!%s@%s [%s]",user->nick,user->ident,user->host,reason);
 681                 AddWhoWas(user);
 682         }
 683
 684         if (iter != clientlist.end())
 685         {
 686                 log(DEBUG,"deleting user hash value %lx",(unsigned long)user);
 687                 if (IS_LOCAL(user))
 688                 {
 689                         fd_ref_table[user->fd] = NULL;
 690                         if (find(local_users.begin(),local_users.end(),user) != local_users.end())
 691                         {
 692                                 local_users.erase(find(local_users.begin(),local_users.end(),user));
 693                                 log(DEBUG,"Delete local user");
 694                         }
 695                 }
 696                 clientlist.erase(iter);
 697                 DELETE(user);
 698         }
 699 }
 700
 701 WhoWasGroup::WhoWasGroup(userrec* user) : host(NULL), dhost(NULL), ident(NULL), server(NULL), gecos(NULL), signon(user->signon)
 702 {
 703         this->host = strdup(user->host);
 704         this->dhost = strdup(user->dhost);
 705         this->ident = strdup(user->ident);
 706         this->server = user->server;
 707         this->gecos = strdup(user->fullname);
 708 }
 709
 710 WhoWasGroup::~WhoWasGroup()
 711 {
 712         if (host)
 713                 free(host);
 714         if (dhost)
 715                 free(dhost);
 716         if (ident)
 717                 free(ident);
 718         if (gecos)
 719                 free(gecos);
 720 }
 721
 722 /* adds or updates an entry in the whowas list */
 723 void AddWhoWas(userrec* u)
 724 {
 725         whowas_users::iterator iter = whowas.find(u->nick);
 726
 727         if (iter == whowas.end())
 728         {
 729                 whowas_set* n = new whowas_set;
 730                 WhoWasGroup *a = new WhoWasGroup(u);
 731                 n->push_back(a);
 732                 whowas[u->nick] = n;
 733         }
 734         else
 735         {
 736                 whowas_set* group = (whowas_set*)iter->second;
 737
 738                 if (group->size() > 10)
 739                 {
 740                         WhoWasGroup *a = (WhoWasGroup*)*(group->begin());
 741                         DELETE(a);
 742                         group->pop_front();
 743                 }
 744
 745                 WhoWasGroup *a = new WhoWasGroup(u);
 746                 group->push_back(a);
 747         }
 748 }
 749
 750 /* every hour, run this function which removes all entries over 3 days */
 751 void MaintainWhoWas(time_t TIME)
 752 {
 753         for (whowas_users::iterator iter = whowas.begin(); iter != whowas.end(); iter++)
 754         {
 755                 whowas_set* n = (whowas_set*)iter->second;
 756                 if (n->size())
 757                 {
 758                         while ((n->begin() != n->end()) && ((*n->begin())->signon < TIME - 259200)) // 3 days
 759                         {
 760                                 WhoWasGroup *a = *(n->begin());
 761                                 DELETE(a);
 762                                 n->erase(n->begin());
 763                         }
 764                 }
 765         }
 766 }
 767
 768 /* add a client connection to the sockets list */
 769 void AddClient(int socket, int port, bool iscached, insp_inaddr ip4)
 770 {
 771         std::string tempnick = ConvToStr(socket) + "-unknown";
 772         user_hash::iterator iter = clientlist.find(tempnick);
 773         const char *ipaddr = insp_ntoa(ip4);
 774         userrec* _new;
 775         int j = 0;
 776
 777         /*
 778          * fix by brain.
 779          * as these nicknames are 'RFC impossible', we can be sure nobody is going to be
 780          * using one as a registered connection. As they are per fd, we can also safely assume
 781          * that we wont have collisions. Therefore, if the nick exists in the list, its only
 782          * used by a dead socket, erase the iterator so that the new client may reclaim it.
 783          * this was probably the cause of 'server ignores me when i hammer it with reconnects'
 784          * issue in earlier alphas/betas
 785          */
 786         if (iter != clientlist.end())
 787         {
 788                 userrec* goner = iter->second;
 789                 DELETE(goner);
 790                 clientlist.erase(iter);
 791         }
 792
 793         log(DEBUG,"AddClient: %d %d %s",socket,port,ipaddr);
 794
 795         _new = new userrec();
 796         clientlist[tempnick] = _new;
 797         _new->fd = socket;
 798         strlcpy(_new->nick,tempnick.c_str(),NICKMAX-1);
 799
 800         /* Smarter than your average bear^H^H^H^Hset of strlcpys. */
 801         for (const char* temp = ipaddr; *temp && j < 64; temp++, j++)
 802                 _new->dhost[j] = _new->host[j] = *temp;
 803         _new->dhost[j] = _new->host[j] = 0;
 804
 805         _new->server = FindServerNamePtr(Config->ServerName);
 806         /* We don't need range checking here, we KNOW 'unknown\0' will fit into the ident field. */
 807         strcpy(_new->ident, "unknown");
 808
 809         _new->registered = REG_NONE;
 810         _new->signon = TIME + Config->dns_timeout;
 811         _new->lastping = 1;
 812         _new->ip4 = ip4;
 813         _new->port = port;
 814
 815         // set the registration timeout for this user
 816         unsigned long class_regtimeout = 90;
 817         int class_flood = 0;
 818         long class_threshold = 5;
 819         long class_sqmax = 262144;      // 256kb
 820         long class_rqmax = 4096;        // 4k
 821
 822         for (ClassVector::iterator i = Config->Classes.begin(); i != Config->Classes.end(); i++)
 823         {
 824                 if ((i->type == CC_ALLOW) && (match(ipaddr,i->host.c_str())))
 825                 {
 826                         class_regtimeout = (unsigned long)i->registration_timeout;
 827                         class_flood = i->flood;
 828                         _new->pingmax = i->pingtime;
 829                         class_threshold = i->threshold;
 830                         class_sqmax = i->sendqmax;
 831                         class_rqmax = i->recvqmax;
 832                         break;
 833                 }
 834         }
 835
 836         _new->nping = TIME + _new->pingmax + Config->dns_timeout;
 837         _new->timeout = TIME+class_regtimeout;
 838         _new->flood = class_flood;
 839         _new->threshold = class_threshold;
 840         _new->sendqmax = class_sqmax;
 841         _new->recvqmax = class_rqmax;
 842
 843         fd_ref_table[socket] = _new;
 844         local_users.push_back(_new);
 845
 846         if (local_users.size() > Config->SoftLimit)
 847         {
 848                 kill_link(_new,"No more connections allowed");
 849                 return;
 850         }
 851
 852         if (local_users.size() >= MAXCLIENTS)
 853         {
 854                 kill_link(_new,"No more connections allowed");
 855                 return;
 856         }
 857
 858         /*
 859          * XXX -
 860          * this is done as a safety check to keep the file descriptors within range of fd_ref_table.
 861          * its a pretty big but for the moment valid assumption:
 862          * file descriptors are handed out starting at 0, and are recycled as theyre freed.
 863          * therefore if there is ever an fd over 65535, 65536 clients must be connected to the
 864          * irc server at once (or the irc server otherwise initiating this many connections, files etc)
 865          * which for the time being is a physical impossibility (even the largest networks dont have more
 866          * than about 10,000 users on ONE server!)
 867          */
 868         if ((unsigned)socket >= MAX_DESCRIPTORS)
 869         {
 870                 kill_link(_new,"Server is full");
 871                 return;
 872         }
 873         char* e = matches_exception(ipaddr);
 874         if (!e)
 875         {
 876                 char* r = matches_zline(ipaddr);
 877                 if (r)
 878                 {
 879                         char reason[MAXBUF];
 880                         snprintf(reason,MAXBUF,"Z-Lined: %s",r);
 881                         kill_link(_new,reason);
 882                         return;
 883                 }
 884         }
 885
 886         if (socket > -1)
 887         {
 888                 ServerInstance->SE->AddFd(socket,true,X_ESTAB_CLIENT);
 889         }
 890
 891         WriteServ(_new->fd,"NOTICE Auth :*** Looking up your hostname...");
 892 }
 893
 894 long FindMatchingGlobal(userrec* user)
 895 {
 896         long x = 0;
 897         for (user_hash::const_iterator a = clientlist.begin(); a != clientlist.end(); a++)
 898         {
 899 #ifdef IPV6
 900                 /* I dont think theres any faster way of matching two ipv6 addresses than memcmp
 901                  * Let me know if you think of one.
 902                   */
 903                 if (!memcmp(a->second->ip4.s6_addr, user->ip4.s6_addr, sizeof(in6_addr)))
 904                         x++;
 905 #else
 906                 if (a->second->ip4.s_addr == user->ip4.s_addr)
 907                         x++;
 908 #endif
 909         }
 910         return x;
 911 }
 912
 913 long FindMatchingLocal(userrec* user)
 914 {
 915         long x = 0;
 916         for (std::vector<userrec*>::const_iterator a = local_users.begin(); a != local_users.end(); a++)
 917         {
 918                 userrec* comp = *a;
 919 #ifdef IPV6
 920                 /* I dont think theres any faster way of matching two ipv6 addresses than memcmp */
 921                 if (!memcmp(comp->ip4.s6_addr, user->ip4.s6_addr, sizeof(in6_addr)))
 922                         x++;
 923 #else
 924                 if (comp->ip4.s_addr == user->ip4.s_addr)
 925                         x++;
 926 #endif
 927         }
 928         return x;
 929 }
 930
 931 void FullConnectUser(userrec* user, CullList* Goners)
 932 {
 933         ServerInstance->stats->statsConnects++;
 934         user->idle_lastmsg = TIME;
 935         log(DEBUG,"ConnectUser: %s",user->nick);
 936
 937         ConnectClass a = GetClass(user);
 938
 939         if (a.type == CC_DENY)
 940         {
 941                 Goners->AddItem(user,"Unauthorised connection");
 942                 return;
 943         }
 944
 945         if ((*(a.pass.c_str())) && (!user->haspassed))
 946         {
 947                 Goners->AddItem(user,"Invalid password");
 948                 return;
 949         }
 950
 951         if (FindMatchingLocal(user) > a.maxlocal)
 952         {
 953                 Goners->AddItem(user,"No more connections allowed from your host via this connect class (local)");
 954                 WriteOpers("*** WARNING: maximum LOCAL connections (%ld) exceeded for IP %s",a.maxlocal,insp_ntoa(user->ip4));
 955                 return;
 956         }
 957         else if (FindMatchingGlobal(user) > a.maxglobal)
 958         {
 959                 Goners->AddItem(user,"No more connections allowed from your host via this connect class (global)");
 960                 WriteOpers("*** WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s",a.maxglobal,insp_ntoa(user->ip4));
 961                 return;
 962         }
 963
 964         char match_against[MAXBUF];
 965         snprintf(match_against,MAXBUF,"%s@%s",user->ident,user->host);
 966         char* e = matches_exception(match_against);
 967
 968         if (!e)
 969         {
 970                 char* r = matches_gline(match_against);
 971
 972                 if (r)
 973                 {
 974                         char reason[MAXBUF];
 975                         snprintf(reason,MAXBUF,"G-Lined: %s",r);
 976                         Goners->AddItem(user,reason);
 977                         return;
 978                 }
 979
 980                 r = matches_kline(match_against);
 981
 982                 if (r)
 983                 {
 984                         char reason[MAXBUF];
 985                         snprintf(reason,MAXBUF,"K-Lined: %s",r);
 986                         Goners->AddItem(user,reason);
 987                         return;
 988                 }
 989         }
 990
 991
 992         WriteServ(user->fd,"NOTICE Auth :Welcome to \002%s\002!",Config->Network);
 993         WriteServ(user->fd,"001 %s :Welcome to the %s IRC Network %s!%s@%s",user->nick,Config->Network,user->nick,user->ident,user->host);
 994         WriteServ(user->fd,"002 %s :Your host is %s, running version %s",user->nick,Config->ServerName,VERSION);
 995         WriteServ(user->fd,"003 %s :This server was created %s %s",user->nick,__TIME__,__DATE__);
 996         WriteServ(user->fd,"004 %s %s %s %s %s %s",user->nick,Config->ServerName,VERSION,ServerInstance->ModeGrok->UserModeList().c_str(),ServerInstance->ModeGrok->ChannelModeList().c_str(),+ServerInstance->ModeGrok->ParaModeList().c_str());
 997
 998         // anfl @ #ratbox, efnet reminded me that according to the RFC this cant contain more than 13 tokens per line...
 999         // so i'd better split it :)
1000         std::stringstream out(Config->data005);
1001         std::string token = "";
1002         std::string line5 = "";
1003         int token_counter = 0;
1004
1005         while (!out.eof())
1006         {
1007                 out >> token;
1008                 line5 = line5 + token + " ";
1009                 token_counter++;
1010
1011                 if ((token_counter >= 13) || (out.eof() == true))
1012                 {
1013                         WriteServ(user->fd,"005 %s %s:are supported by this server",user->nick,line5.c_str());
1014                         line5 = "";
1015                         token_counter = 0;
1016                 }
1017         }
1018
1019         ShowMOTD(user);
1020
1021         /*
1022          * fix 3 by brain, move registered = 7 below these so that spurious modes and host
1023          * changes dont go out onto the network and produce 'fake direction'.
1024          */
1025         FOREACH_MOD(I_OnUserConnect,OnUserConnect(user));
1026         FOREACH_MOD(I_OnGlobalConnect,OnGlobalConnect(user));
1027         user->registered = REG_ALL;
1028         WriteOpers("*** Client connecting on port %lu: %s!%s@%s [%s]",(unsigned long)user->port,user->nick,user->ident,user->host,insp_ntoa(user->ip4));
1029 }
1030
1031 /** ReHashNick()
1032  * re-allocates a nick in the user_hash after they change nicknames,
1033  * returns a pointer to the new user as it may have moved
1034  */
1035 userrec* ReHashNick(const char* Old, const char* New)
1036 {
1037         //user_hash::iterator newnick;
1038         user_hash::iterator oldnick = clientlist.find(Old);
1039
1040         log(DEBUG,"ReHashNick: %s %s",Old,New);
1041
1042         if (!strcasecmp(Old,New))
1043         {
1044                 log(DEBUG,"old nick is new nick, skipping");
1045                 return oldnick->second;
1046         }
1047
1048         if (oldnick == clientlist.end())
1049                 return NULL; /* doesnt exist */
1050
1051         log(DEBUG,"ReHashNick: Found hashed nick %s",Old);
1052
1053         userrec* olduser = oldnick->second;
1054         clientlist[New] = olduser;
1055         clientlist.erase(oldnick);
1056
1057         log(DEBUG,"ReHashNick: Nick rehashed as %s",New);
1058
1059         return clientlist[New];
1060 }
1061
1062 void force_nickchange(userrec* user,const char* newnick)
1063 {
1064         char nick[MAXBUF];
1065         int MOD_RESULT = 0;
1066
1067         *nick = 0;
1068
1069         FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(user,newnick));
1070
1071         if (MOD_RESULT)
1072         {
1073                 ServerInstance->stats->statsCollisions++;
1074                 kill_link(user,"Nickname collision");
1075                 return;
1076         }
1077
1078         if (matches_qline(newnick))
1079         {
1080                 ServerInstance->stats->statsCollisions++;
1081                 kill_link(user,"Nickname collision");
1082                 return;
1083         }
1084
1085         if (user)
1086         {
1087                 if (newnick)
1088                 {
1089                         strlcpy(nick,newnick,MAXBUF-1);
1090                 }
1091
1092                 if (user->registered == REG_ALL)
1093                 {
1094                         const char* pars[1];
1095                         pars[0] = nick;
1096                         std::string cmd = "NICK";
1097
1098                         ServerInstance->Parser->CallHandler(cmd,pars,1,user);
1099                 }
1100         }
1101 }