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, this->GetIPString(), 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 (this->bound_user->GetIPString() == result)
 177                 {
 178                         std::string hostname = this->bound_user->stored_host;
 179                         if (hostname.length() < 65)
 180                         {
 181                                 /* Hostnames starting with : are not a good thing (tm) */
 182                                 if (*(hostname.c_str()) == ':')
 183                                         hostname = "0" + hostname;
 184
 185                                 WriteServ(this->bound_fd, "NOTICE Auth :*** Found your hostname (%s)", hostname.c_str());
 186                                 this->bound_user->dns_done = true;
 187                                 strlcpy(this->bound_user->dhost, hostname.c_str(),64);
 188                                 strlcpy(this->bound_user->host, hostname.c_str(),64);
 189                         }
 190                         else
 191                         {
 192                                 WriteServ(this->bound_fd, "NOTICE Auth :*** Your hostname is longer than the maximum of 64 characters, using your IP address (%s) instead.", this->bound_user->GetIPString());
 193                         }
 194                 }
 195                 else
 196                 {
 197                         WriteServ(this->bound_fd, "NOTICE Auth :*** Your hostname does not match up with your IP address. Sorry, using your IP address (%s) instead.", this->bound_user->GetIPString());
 198                 }
 199         }
 200 }
 201
 202 void UserResolver::OnError(ResolverError e, const std::string &errormessage)
 203 {
 204         if (fd_ref_table[this->bound_fd] == this->bound_user)
 205         {
 206                 /* Error message here */
 207                 WriteServ(this->bound_fd, "NOTICE Auth :*** Could not resolve your hostname, using your IP address (%s) instead.", this->bound_user->GetIPString());
 208                 this->bound_user->dns_done = true;
 209         }
 210 }
 211
 212
 213 bool userrec::IsNoticeMaskSet(unsigned char sm)
 214 {
 215         return (snomasks[sm-65]);
 216 }
 217
 218 void userrec::SetNoticeMask(unsigned char sm, bool value)
 219 {
 220         snomasks[sm-65] = value;
 221 }
 222
 223 const char* userrec::FormatNoticeMasks()
 224 {
 225         static char data[MAXBUF];
 226         int offset = 0;
 227
 228         for (int n = 0; n < 64; n++)
 229         {
 230                 if (snomasks[n])
 231                         data[offset++] = n+65;
 232         }
 233
 234         data[offset] = 0;
 235         return data;
 236 }
 237
 238
 239
 240 bool userrec::IsModeSet(unsigned char m)
 241 {
 242         return (modes[m-65]);
 243 }
 244
 245 void userrec::SetMode(unsigned char m, bool value)
 246 {
 247         modes[m-65] = value;
 248 }
 249
 250 const char* userrec::FormatModes()
 251 {
 252         static char data[MAXBUF];
 253         int offset = 0;
 254         for (int n = 0; n < 64; n++)
 255         {
 256                 if (modes[n])
 257                         data[offset++] = n+65;
 258         }
 259         data[offset] = 0;
 260         return data;
 261 }
 262
 263 userrec::userrec()
 264 {
 265         // the PROPER way to do it, AVOID bzero at *ALL* costs
 266         *password = *nick = *ident = *host = *dhost = *fullname = *awaymsg = *oper = 0;
 267         server = (char*)FindServerNamePtr(Config->ServerName);
 268         reset_due = TIME;
 269         lines_in = fd = lastping = signon = idle_lastmsg = nping = registered = 0;
 270         timeout = flood = bytes_in = bytes_out = cmds_in = cmds_out = 0;
 271         haspassed = dns_done = false;
 272         recvq = "";
 273         sendq = "";
 274         WriteError = "";
 275         res_forward = res_reverse = NULL;
 276         ip = NULL;
 277         chans.clear();
 278         invites.clear();
 279         chans.resize(MAXCHANS);
 280         memset(modes,0,sizeof(modes));
 281
 282         for (unsigned int n = 0; n < MAXCHANS; n++)
 283         {
 284                 ucrec* x = new ucrec();
 285                 chans[n] = x;
 286                 x->channel = NULL;
 287                 x->uc_modes = 0;
 288         }
 289 }
 290
 291 userrec::~userrec()
 292 {
 293         for (std::vector<ucrec*>::iterator n = chans.begin(); n != chans.end(); n++)
 294         {
 295                 ucrec* x = (ucrec*)*n;
 296                 delete x;
 297         }
 298
 299         if (ip)
 300         {
 301                 if (this->GetProtocolFamily() == AF_INET)
 302                 {
 303                         delete (sockaddr_in*)ip;
 304                 }
 305 #ifdef SUPPORT_IP6LINKS
 306                 else
 307                 {
 308                         delete (sockaddr_in6*)ip;
 309                 }
 310 #endif
 311         }
 312 }
 313
 314 /* XXX - minor point, other *Host functions return a char *, this one creates it. Might be nice to be consistant? */
 315 void userrec::MakeHost(char* nhost)
 316 {
 317         /* This is much faster than snprintf */
 318         char* t = nhost;
 319         for(char* n = ident; *n; n++)
 320                 *t++ = *n;
 321         *t++ = '@';
 322         for(char* n = host; *n; n++)
 323                 *t++ = *n;
 324         *t = 0;
 325 }
 326
 327 void userrec::CloseSocket()
 328 {
 329         shutdown(this->fd,2);
 330         close(this->fd);
 331 }
 332
 333 char* userrec::GetFullHost()
 334 {
 335         static char result[MAXBUF];
 336         char* t = result;
 337         for(char* n = nick; *n; n++)
 338                 *t++ = *n;
 339         *t++ = '!';
 340         for(char* n = ident; *n; n++)
 341                 *t++ = *n;
 342         *t++ = '@';
 343         for(char* n = dhost; *n; n++)
 344                 *t++ = *n;
 345         *t = 0;
 346         return result;
 347 }
 348
 349 char* userrec::MakeWildHost()
 350 {
 351         static char nresult[MAXBUF];
 352         char* t = nresult;
 353         *t++ = '*';     *t++ = '!';
 354         *t++ = '*';     *t++ = '@';
 355         for(char* n = dhost; *n; n++)
 356                 *t++ = *n;
 357         *t = 0;
 358         return nresult;
 359 }
 360
 361 int userrec::ReadData(void* buffer, size_t size)
 362 {
 363         if (this->fd > -1)
 364         {
 365                 return read(this->fd, buffer, size);
 366         }
 367         else
 368                 return 0;
 369 }
 370
 371
 372 char* userrec::GetFullRealHost()
 373 {
 374         static char fresult[MAXBUF];
 375         char* t = fresult;
 376         for(char* n = nick; *n; n++)
 377                 *t++ = *n;
 378         *t++ = '!';
 379         for(char* n = ident; *n; n++)
 380                 *t++ = *n;
 381         *t++ = '@';
 382         for(char* n = host; *n; n++)
 383                 *t++ = *n;
 384         *t = 0;
 385         return fresult;
 386 }
 387
 388 bool userrec::IsInvited(irc::string &channel)
 389 {
 390         for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 391         {
 392                 irc::string compare = i->channel;
 393
 394                 if (compare == channel)
 395                 {
 396                         return true;
 397                 }
 398         }
 399         return false;
 400 }
 401
 402 InvitedList* userrec::GetInviteList()
 403 {
 404         return &invites;
 405 }
 406
 407 void userrec::InviteTo(irc::string &channel)
 408 {
 409         Invited i;
 410         i.channel = channel;
 411         invites.push_back(i);
 412 }
 413
 414 void userrec::RemoveInvite(irc::string &channel)
 415 {
 416         log(DEBUG,"Removing invites");
 417
 418         if (invites.size())
 419         {
 420                 for (InvitedList::iterator i = invites.begin(); i != invites.end(); i++)
 421                 {
 422                         irc::string compare = i->channel;
 423
 424                         if (compare == channel)
 425                         {
 426                                 invites.erase(i);
 427                                 return;
 428                         }
 429                 }
 430         }
 431 }
 432
 433 bool userrec::HasPermission(const std::string &command)
 434 {
 435         char* mycmd;
 436         char* savept;
 437         char* savept2;
 438
 439         /*
 440          * users on remote servers can completely bypass all permissions based checks.
 441          * This prevents desyncs when one server has different type/class tags to another.
 442          * That having been said, this does open things up to the possibility of source changes
 443          * allowing remote kills, etc - but if they have access to the src, they most likely have
 444          * access to the conf - so it's an end to a means either way.
 445          */
 446         if (!IS_LOCAL(this))
 447                 return true;
 448
 449         // are they even an oper at all?
 450         if (*this->oper)
 451         {
 452                 opertype_t::iterator iter_opertype = opertypes.find(this->oper);
 453                 if (iter_opertype != opertypes.end())
 454                 {
 455                         char* Classes = strdup(iter_opertype->second);
 456                         char* myclass = strtok_r(Classes," ",&savept);
 457                         while (myclass)
 458                         {
 459                                 operclass_t::iterator iter_operclass = operclass.find(myclass);
 460                                 if (iter_operclass != operclass.end())
 461                                 {
 462                                         char* CommandList = strdup(iter_operclass->second);
 463                                         mycmd = strtok_r(CommandList," ",&savept2);
 464                                         while (mycmd)
 465                                         {
 466                                                 if ((!strcasecmp(mycmd,command.c_str())) || (*mycmd == '*'))
 467                                                 {
 468                                                         free(Classes);
 469                                                         free(CommandList);
 470                                                         return true;
 471                                                 }
 472                                                 mycmd = strtok_r(NULL," ",&savept2);
 473                                         }
 474                                         free(CommandList);
 475                                 }
 476                                 myclass = strtok_r(NULL," ",&savept);
 477                         }
 478                         free(Classes);
 479                 }
 480         }
 481         return false;
 482 }
 483
 484
 485 bool userrec::AddBuffer(const std::string &a)
 486 {
 487         std::string b = "";
 488
 489         /* NB: std::string is arsey about \r and \n and tries to translate them
 490          * somehow, so we CANNOT use std::string::find() here :(
 491          */
 492         for (std::string::const_iterator i = a.begin(); i != a.end(); i++)
 493         {
 494                 if (*i != '\r')
 495                         b += *i;
 496         }
 497
 498         if (b.length())
 499                 recvq.append(b);
 500
 501         if (recvq.length() > (unsigned)this->recvqmax)
 502         {
 503                 this->SetWriteError("RecvQ exceeded");
 504                 WriteOpers("*** User %s RecvQ of %d exceeds connect class maximum of %d",this->nick,recvq.length(),this->recvqmax);
 505                 return false;
 506         }
 507
 508         return true;
 509 }
 510
 511 bool userrec::BufferIsReady()
 512 {
 513         return (recvq.find('\n') != std::string::npos);
 514 }
 515
 516 void userrec::ClearBuffer()
 517 {
 518         recvq = "";
 519 }
 520
 521 std::string userrec::GetBuffer()
 522 {
 523         if (!recvq.length())
 524                 return "";
 525
 526         /* Strip any leading \r or \n off the string.
 527          * Usually there are only one or two of these,
 528          * so its is computationally cheap to do.
 529          */
 530         while ((*recvq.begin() == '\r') || (*recvq.begin() == '\n'))
 531                 recvq.erase(recvq.begin());
 532
 533         for (std::string::iterator x = recvq.begin(); x != recvq.end(); x++)
 534         {
 535                 /* Find the first complete line, return it as the
 536                  * result, and leave the recvq as whats left
 537                  */
 538                 if (*x == '\n')
 539                 {
 540                         std::string ret = std::string(recvq.begin(), x);
 541                         recvq.erase(recvq.begin(), x + 1);
 542                         return ret;
 543                 }
 544         }
 545         return "";
 546 }
 547
 548 void userrec::AddWriteBuf(const std::string &data)
 549 {
 550         if (*this->GetWriteError())
 551                 return;
 552
 553         if (sendq.length() + data.length() > (unsigned)this->sendqmax)
 554         {
 555                 /*
 556                  * Fix by brain - Set the error text BEFORE calling writeopers, because
 557                  * if we dont it'll recursively  call here over and over again trying
 558                  * to repeatedly add the text to the sendq!
 559                  */
 560                 this->SetWriteError("SendQ exceeded");
 561                 WriteOpers("*** User %s SendQ of %d exceeds connect class maximum of %d",this->nick,sendq.length() + data.length(),this->sendqmax);
 562                 return;
 563         }
 564
 565         if (data.length() > 512)
 566         {
 567                 std::string newdata(data);
 568                 newdata.resize(510);
 569                 newdata.append("\r\n");
 570                 sendq.append(newdata);
 571         }
 572         else
 573         {
 574                 sendq.append(data);
 575         }
 576 }
 577
 578 // send AS MUCH OF THE USERS SENDQ as we are able to (might not be all of it)
 579 void userrec::FlushWriteBuf()
 580 {
 581         if ((sendq.length()) && (this->fd != FD_MAGIC_NUMBER))
 582         {
 583                 const char* tb = this->sendq.c_str();
 584                 int n_sent = write(this->fd,tb,this->sendq.length());
 585                 if (n_sent == -1)
 586                 {
 587                         if (errno != EAGAIN)
 588                                 this->SetWriteError(strerror(errno));
 589                 }
 590                 else
 591                 {
 592                         // advance the queue
 593                         tb += n_sent;
 594                         this->sendq = tb;
 595                         // update the user's stats counters
 596                         this->bytes_out += n_sent;
 597                         this->cmds_out++;
 598                 }
 599         }
 600 }
 601
 602 void userrec::SetWriteError(const std::string &error)
 603 {
 604         log(DEBUG,"SetWriteError: %s",error.c_str());
 605         // don't try to set the error twice, its already set take the first string.
 606         if (!this->WriteError.length())
 607         {
 608                 log(DEBUG,"Setting error string for %s to '%s'",this->nick,error.c_str());
 609                 this->WriteError = error;
 610         }
 611 }
 612
 613 const char* userrec::GetWriteError()
 614 {
 615         return this->WriteError.c_str();
 616 }
 617
 618 void AddOper(userrec* user)
 619 {
 620         log(DEBUG,"Oper added to optimization list");
 621         all_opers.push_back(user);
 622 }
 623
 624 void DeleteOper(userrec* user)
 625 {
 626         for (std::vector<userrec*>::iterator a = all_opers.begin(); a < all_opers.end(); a++)
 627         {
 628                 if (*a == user)
 629                 {
 630                         log(DEBUG,"Oper removed from optimization list");
 631                         all_opers.erase(a);
 632                         return;
 633                 }
 634         }
 635 }
 636
 637 void kill_link(userrec *user,const char* r)
 638 {
 639         user_hash::iterator iter = clientlist.find(user->nick);
 640
 641 /*
 642  * I'm pretty sure returning here is causing a desync when part of the net thinks a user is gone,
 643  * and another part doesn't. We want to broadcast the quit/kill before bailing so the net stays in sync.
 644  *
 645  * I can't imagine this blowing up, so I'm commenting it out. We still check
 646  * before playing with a bad iterator below in our if(). DISCUSS THIS BEFORE YOU DO ANYTHING. --w00t
 647  *
 648  *      if (iter == clientlist.end())
 649  *              return;
 650  */
 651
 652         char reason[MAXBUF];
 653
 654         strlcpy(reason,r,MAXQUIT-1);
 655         log(DEBUG,"kill_link: %s %d '%s'",user->nick,user->fd,reason);
 656
 657         if (IS_LOCAL(user))
 658                 Write(user->fd,"ERROR :Closing link (%s@%s) [%s]",user->ident,user->host,reason);
 659
 660         if (user->registered == REG_ALL)
 661         {
 662                 purge_empty_chans(user);
 663                 FOREACH_MOD(I_OnUserQuit,OnUserQuit(user,reason));
 664                 WriteCommonExcept(user,"QUIT :%s",reason);
 665         }
 666
 667         if (IS_LOCAL(user))
 668                 user->FlushWriteBuf();
 669
 670         FOREACH_MOD(I_OnUserDisconnect,OnUserDisconnect(user));
 671
 672         if (IS_LOCAL(user))
 673         {
 674                 if (Config->GetIOHook(user->GetPort()))
 675                 {
 676                         try
 677                         {
 678                                 Config->GetIOHook(user->GetPort())->OnRawSocketClose(user->fd);
 679                         }
 680                         catch (ModuleException& modexcept)
 681                         {
 682                                 log(DEBUG,"Module exception cought: %s",modexcept.GetReason());
 683                         }
 684                 }
 685
 686                 ServerInstance->SE->DelFd(user->fd);
 687                 user->CloseSocket();
 688         }
 689
 690         /*
 691          * this must come before the WriteOpers so that it doesnt try to fill their buffer with anything
 692          * if they were an oper with +s.
 693          *
 694          * XXX -
 695          * In the current implementation, we only show local quits, as we only show local connects. With
 696          * the proposed implmentation of snomasks however, this will likely change in the (near?) future.
 697          */
 698         if (user->registered == REG_ALL)
 699         {
 700                 if (IS_LOCAL(user))
 701                         WriteOpers("*** Client exiting: %s!%s@%s [%s]",user->nick,user->ident,user->host,reason);
 702                 AddWhoWas(user);
 703         }
 704
 705         if (iter != clientlist.end())
 706         {
 707                 log(DEBUG,"deleting user hash value %lx",(unsigned long)user);
 708                 if (IS_LOCAL(user))
 709                 {
 710                         fd_ref_table[user->fd] = NULL;
 711                         if (find(local_users.begin(),local_users.end(),user) != local_users.end())
 712                         {
 713                                 local_users.erase(find(local_users.begin(),local_users.end(),user));
 714                                 log(DEBUG,"Delete local user");
 715                         }
 716                 }
 717                 clientlist.erase(iter);
 718                 DELETE(user);
 719         }
 720 }
 721
 722 WhoWasGroup::WhoWasGroup(userrec* user) : host(NULL), dhost(NULL), ident(NULL), server(NULL), gecos(NULL), signon(user->signon)
 723 {
 724         this->host = strdup(user->host);
 725         this->dhost = strdup(user->dhost);
 726         this->ident = strdup(user->ident);
 727         this->server = user->server;
 728         this->gecos = strdup(user->fullname);
 729 }
 730
 731 WhoWasGroup::~WhoWasGroup()
 732 {
 733         if (host)
 734                 free(host);
 735         if (dhost)
 736                 free(dhost);
 737         if (ident)
 738                 free(ident);
 739         if (gecos)
 740                 free(gecos);
 741 }
 742
 743 /* adds or updates an entry in the whowas list */
 744 void AddWhoWas(userrec* u)
 745 {
 746         whowas_users::iterator iter = whowas.find(u->nick);
 747
 748         if (iter == whowas.end())
 749         {
 750                 whowas_set* n = new whowas_set;
 751                 WhoWasGroup *a = new WhoWasGroup(u);
 752                 n->push_back(a);
 753                 whowas[u->nick] = n;
 754         }
 755         else
 756         {
 757                 whowas_set* group = (whowas_set*)iter->second;
 758
 759                 if (group->size() > 10)
 760                 {
 761                         WhoWasGroup *a = (WhoWasGroup*)*(group->begin());
 762                         DELETE(a);
 763                         group->pop_front();
 764                 }
 765
 766                 WhoWasGroup *a = new WhoWasGroup(u);
 767                 group->push_back(a);
 768         }
 769 }
 770
 771 /* every hour, run this function which removes all entries over 3 days */
 772 void MaintainWhoWas(time_t TIME)
 773 {
 774         for (whowas_users::iterator iter = whowas.begin(); iter != whowas.end(); iter++)
 775         {
 776                 whowas_set* n = (whowas_set*)iter->second;
 777                 if (n->size())
 778                 {
 779                         while ((n->begin() != n->end()) && ((*n->begin())->signon < TIME - 259200)) // 3 days
 780                         {
 781                                 WhoWasGroup *a = *(n->begin());
 782                                 DELETE(a);
 783                                 n->erase(n->begin());
 784                         }
 785                 }
 786         }
 787 }
 788
 789 /* add a client connection to the sockets list */
 790 void AddClient(int socket, int port, bool iscached, insp_inaddr ip)
 791 {
 792         std::string tempnick = ConvToStr(socket) + "-unknown";
 793         user_hash::iterator iter = clientlist.find(tempnick);
 794         const char *ipaddr = insp_ntoa(ip);
 795         userrec* _new;
 796         int j = 0;
 797
 798         /*
 799          * fix by brain.
 800          * as these nicknames are 'RFC impossible', we can be sure nobody is going to be
 801          * using one as a registered connection. As they are per fd, we can also safely assume
 802          * that we wont have collisions. Therefore, if the nick exists in the list, its only
 803          * used by a dead socket, erase the iterator so that the new client may reclaim it.
 804          * this was probably the cause of 'server ignores me when i hammer it with reconnects'
 805          * issue in earlier alphas/betas
 806          */
 807         if (iter != clientlist.end())
 808         {
 809                 userrec* goner = iter->second;
 810                 DELETE(goner);
 811                 clientlist.erase(iter);
 812         }
 813
 814         log(DEBUG,"AddClient: %d %d %s",socket,port,ipaddr);
 815
 816         _new = new userrec();
 817         clientlist[tempnick] = _new;
 818         _new->fd = socket;
 819         strlcpy(_new->nick,tempnick.c_str(),NICKMAX-1);
 820
 821         _new->server = FindServerNamePtr(Config->ServerName);
 822         /* We don't need range checking here, we KNOW 'unknown\0' will fit into the ident field. */
 823         strcpy(_new->ident, "unknown");
 824
 825         _new->registered = REG_NONE;
 826         _new->signon = TIME + Config->dns_timeout;
 827         _new->lastping = 1;
 828
 829         log(DEBUG,"Setting socket addresses");
 830         _new->SetSockAddr(AF_FAMILY, ipaddr, port);
 831         log(DEBUG,"Socket addresses set.");
 832
 833         /* Smarter than your average bear^H^H^H^Hset of strlcpys. */
 834         for (const char* temp = _new->GetIPString(); *temp && j < 64; temp++, j++)
 835                 _new->dhost[j] = _new->host[j] = *temp;
 836         _new->dhost[j] = _new->host[j] = 0;
 837
 838         // set the registration timeout for this user
 839         unsigned long class_regtimeout = 90;
 840         int class_flood = 0;
 841         long class_threshold = 5;
 842         long class_sqmax = 262144;      // 256kb
 843         long class_rqmax = 4096;        // 4k
 844
 845         for (ClassVector::iterator i = Config->Classes.begin(); i != Config->Classes.end(); i++)
 846         {
 847                 if ((i->type == CC_ALLOW) && (match(ipaddr,i->host.c_str(),true)))
 848                 {
 849                         class_regtimeout = (unsigned long)i->registration_timeout;
 850                         class_flood = i->flood;
 851                         _new->pingmax = i->pingtime;
 852                         class_threshold = i->threshold;
 853                         class_sqmax = i->sendqmax;
 854                         class_rqmax = i->recvqmax;
 855                         break;
 856                 }
 857         }
 858
 859         _new->nping = TIME + _new->pingmax + Config->dns_timeout;
 860         _new->timeout = TIME+class_regtimeout;
 861         _new->flood = class_flood;
 862         _new->threshold = class_threshold;
 863         _new->sendqmax = class_sqmax;
 864         _new->recvqmax = class_rqmax;
 865
 866         fd_ref_table[socket] = _new;
 867         local_users.push_back(_new);
 868
 869         if (local_users.size() > Config->SoftLimit)
 870         {
 871                 kill_link(_new,"No more connections allowed");
 872                 return;
 873         }
 874
 875         if (local_users.size() >= MAXCLIENTS)
 876         {
 877                 kill_link(_new,"No more connections allowed");
 878                 return;
 879         }
 880
 881         /*
 882          * XXX -
 883          * this is done as a safety check to keep the file descriptors within range of fd_ref_table.
 884          * its a pretty big but for the moment valid assumption:
 885          * file descriptors are handed out starting at 0, and are recycled as theyre freed.
 886          * therefore if there is ever an fd over 65535, 65536 clients must be connected to the
 887          * irc server at once (or the irc server otherwise initiating this many connections, files etc)
 888          * which for the time being is a physical impossibility (even the largest networks dont have more
 889          * than about 10,000 users on ONE server!)
 890          */
 891         if ((unsigned)socket >= MAX_DESCRIPTORS)
 892         {
 893                 kill_link(_new,"Server is full");
 894                 return;
 895         }
 896         char* e = matches_exception(ipaddr);
 897         if (!e)
 898         {
 899                 char* r = matches_zline(ipaddr);
 900                 if (r)
 901                 {
 902                         char reason[MAXBUF];
 903                         snprintf(reason,MAXBUF,"Z-Lined: %s",r);
 904                         kill_link(_new,reason);
 905                         return;
 906                 }
 907         }
 908
 909         if (socket > -1)
 910         {
 911                 if (!ServerInstance->SE->AddFd(socket,true,X_ESTAB_CLIENT))
 912                 {
 913                         kill_link(_new, "Internal error handling connection");
 914                         return;
 915                 }
 916         }
 917
 918         WriteServ(_new->fd,"NOTICE Auth :*** Looking up your hostname...");
 919 }
 920
 921 long FindMatchingGlobal(userrec* user)
 922 {
 923         char u1[1024];
 924         char u2[1024];
 925         long x = 0;
 926         for (user_hash::const_iterator a = clientlist.begin(); a != clientlist.end(); a++)
 927         {
 928                 /* We have to match ip's as strings - we don't know what protocol
 929                  * a remote user may be using
 930                  */
 931                 if (!strcasecmp(a->second->GetIPString(u1), user->GetIPString(u2)))
 932                                 x++;
 933         }
 934         return x;
 935 }
 936
 937 long FindMatchingLocal(userrec* user)
 938 {
 939         long x = 0;
 940         for (std::vector<userrec*>::const_iterator a = local_users.begin(); a != local_users.end(); a++)
 941         {
 942                 userrec* comp = *a;
 943 #ifdef IPV6
 944                 /* I dont think theres any faster way of matching two ipv6 addresses than memcmp */
 945                 in6_addr* s1 = &(((sockaddr_in6*)comp->ip)->sin6_addr);
 946                 in6_addr* s2 = &(((sockaddr_in6*)user->ip)->sin6_addr);
 947                 if (!memcmp(s1->s6_addr, s2->s6_addr, sizeof(in6_addr)))
 948                         x++;
 949 #else
 950                 in_addr* s1 = &((sockaddr_in*)comp->ip)->sin_addr;
 951                 in_addr* s2 = &((sockaddr_in*)user->ip)->sin_addr;
 952                 if (s1->s_addr == s2->s_addr)
 953                         x++;
 954 #endif
 955         }
 956         return x;
 957 }
 958
 959 void FullConnectUser(userrec* user, CullList* Goners)
 960 {
 961         ServerInstance->stats->statsConnects++;
 962         user->idle_lastmsg = TIME;
 963         log(DEBUG,"ConnectUser: %s",user->nick);
 964
 965         ConnectClass a = GetClass(user);
 966
 967         if (a.type == CC_DENY)
 968         {
 969                 Goners->AddItem(user,"Unauthorised connection");
 970                 return;
 971         }
 972
 973         if ((*(a.pass.c_str())) && (!user->haspassed))
 974         {
 975                 Goners->AddItem(user,"Invalid password");
 976                 return;
 977         }
 978
 979         if (FindMatchingLocal(user) > a.maxlocal)
 980         {
 981                 Goners->AddItem(user,"No more connections allowed from your host via this connect class (local)");
 982                 WriteOpers("*** WARNING: maximum LOCAL connections (%ld) exceeded for IP %s",a.maxlocal,user->GetIPString());
 983                 return;
 984         }
 985         else if (FindMatchingGlobal(user) > a.maxglobal)
 986         {
 987                 Goners->AddItem(user,"No more connections allowed from your host via this connect class (global)");
 988                 WriteOpers("*** WARNING: maximum GLOBAL connections (%ld) exceeded for IP %s",a.maxglobal,user->GetIPString());
 989                 return;
 990         }
 991
 992         char match_against[MAXBUF];
 993         snprintf(match_against,MAXBUF,"%s@%s",user->ident,user->host);
 994         char* e = matches_exception(match_against);
 995
 996         if (!e)
 997         {
 998                 char* r = matches_gline(match_against);
 999
1000                 if (r)
1001                 {
1002                         char reason[MAXBUF];
1003                         snprintf(reason,MAXBUF,"G-Lined: %s",r);
1004                         Goners->AddItem(user,reason);
1005                         return;
1006                 }
1007
1008                 r = matches_kline(match_against);
1009
1010                 if (r)
1011                 {
1012                         char reason[MAXBUF];
1013                         snprintf(reason,MAXBUF,"K-Lined: %s",r);
1014                         Goners->AddItem(user,reason);
1015                         return;
1016                 }
1017         }
1018
1019
1020         WriteServ(user->fd,"NOTICE Auth :Welcome to \002%s\002!",Config->Network);
1021         WriteServ(user->fd,"001 %s :Welcome to the %s IRC Network %s!%s@%s",user->nick,Config->Network,user->nick,user->ident,user->host);
1022         WriteServ(user->fd,"002 %s :Your host is %s, running version %s",user->nick,Config->ServerName,VERSION);
1023         WriteServ(user->fd,"003 %s :This server was created %s %s",user->nick,__TIME__,__DATE__);
1024         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());
1025
1026         // anfl @ #ratbox, efnet reminded me that according to the RFC this cant contain more than 13 tokens per line...
1027         // so i'd better split it :)
1028         std::stringstream out(Config->data005);
1029         std::string token = "";
1030         std::string line5 = "";
1031         int token_counter = 0;
1032
1033         while (!out.eof())
1034         {
1035                 out >> token;
1036                 line5 = line5 + token + " ";
1037                 token_counter++;
1038
1039                 if ((token_counter >= 13) || (out.eof() == true))
1040                 {
1041                         WriteServ(user->fd,"005 %s %s:are supported by this server",user->nick,line5.c_str());
1042                         line5 = "";
1043                         token_counter = 0;
1044                 }
1045         }
1046
1047         ShowMOTD(user);
1048
1049         /*
1050          * fix 3 by brain, move registered = 7 below these so that spurious modes and host
1051          * changes dont go out onto the network and produce 'fake direction'.
1052          */
1053         FOREACH_MOD(I_OnUserConnect,OnUserConnect(user));
1054         FOREACH_MOD(I_OnGlobalConnect,OnGlobalConnect(user));
1055         user->registered = REG_ALL;
1056         WriteOpers("*** Client connecting on port %d: %s!%s@%s [%s]",user->GetPort(),user->nick,user->ident,user->host,user->GetIPString());
1057 }
1058
1059 /** ReHashNick()
1060  * re-allocates a nick in the user_hash after they change nicknames,
1061  * returns a pointer to the new user as it may have moved
1062  */
1063 userrec* ReHashNick(const char* Old, const char* New)
1064 {
1065         //user_hash::iterator newnick;
1066         user_hash::iterator oldnick = clientlist.find(Old);
1067
1068         log(DEBUG,"ReHashNick: %s %s",Old,New);
1069
1070         if (!strcasecmp(Old,New))
1071         {
1072                 log(DEBUG,"old nick is new nick, skipping");
1073                 return oldnick->second;
1074         }
1075
1076         if (oldnick == clientlist.end())
1077                 return NULL; /* doesnt exist */
1078
1079         log(DEBUG,"ReHashNick: Found hashed nick %s",Old);
1080
1081         userrec* olduser = oldnick->second;
1082         clientlist[New] = olduser;
1083         clientlist.erase(oldnick);
1084
1085         log(DEBUG,"ReHashNick: Nick rehashed as %s",New);
1086
1087         return clientlist[New];
1088 }
1089
1090 void force_nickchange(userrec* user,const char* newnick)
1091 {
1092         char nick[MAXBUF];
1093         int MOD_RESULT = 0;
1094
1095         *nick = 0;
1096
1097         FOREACH_RESULT(I_OnUserPreNick,OnUserPreNick(user,newnick));
1098
1099         if (MOD_RESULT)
1100         {
1101                 ServerInstance->stats->statsCollisions++;
1102                 kill_link(user,"Nickname collision");
1103                 return;
1104         }
1105
1106         if (matches_qline(newnick))
1107         {
1108                 ServerInstance->stats->statsCollisions++;
1109                 kill_link(user,"Nickname collision");
1110                 return;
1111         }
1112
1113         if (user)
1114         {
1115                 if (newnick)
1116                 {
1117                         strlcpy(nick,newnick,MAXBUF-1);
1118                 }
1119
1120                 if (user->registered == REG_ALL)
1121                 {
1122                         const char* pars[1];
1123                         pars[0] = nick;
1124                         std::string cmd = "NICK";
1125
1126                         ServerInstance->Parser->CallHandler(cmd,pars,1,user);
1127                 }
1128         }
1129 }
1130
1131 void userrec::SetSockAddr(int protocol_family, const char* ip, int port)
1132 {
1133         switch (protocol_family)
1134         {
1135 #ifdef SUPPORT_IP6LINKS
1136                 case AF_INET6:
1137                 {
1138                         log(DEBUG,"Set inet6 protocol address");
1139                         sockaddr_in6* sin = new sockaddr_in6;
1140                         sin->sin6_family = AF_INET6;
1141                         sin->sin6_port = port;
1142                         inet_pton(AF_INET6, ip, &sin->sin6_addr);
1143                         this->ip = (sockaddr*)sin;
1144                 }
1145                 break;
1146 #endif
1147                 case AF_INET:
1148                 {
1149                         log(DEBUG,"Set inet4 protocol address");
1150                         sockaddr_in* sin = new sockaddr_in;
1151                         sin->sin_family = AF_INET;
1152                         sin->sin_port = port;
1153                         inet_pton(AF_INET, ip, &sin->sin_addr);
1154                         this->ip = (sockaddr*)sin;
1155                 }
1156                 break;
1157                 default:
1158                         log(DEBUG,"Ut oh, I dont know protocol %d to be set on '%s'!", protocol_family, this->nick);
1159                 break;
1160         }
1161 }
1162
1163 int userrec::GetPort()
1164 {
1165         if (this->ip == NULL)
1166                 return 0;
1167
1168         switch (this->GetProtocolFamily())
1169         {
1170 #ifdef SUPPORT_IP6LINKS
1171                 case AF_INET6:
1172                 {
1173                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1174                         return sin->sin6_port;
1175                 }
1176                 break;
1177 #endif
1178                 case AF_INET:
1179                 {
1180                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1181                         return sin->sin_port;
1182                 }
1183                 break;
1184                 default:
1185                         log(DEBUG,"Ut oh, '%s' has an unknown protocol family!",this->nick);
1186                 break;
1187         }
1188         return 0;
1189 }
1190
1191 int userrec::GetProtocolFamily()
1192 {
1193         if (this->ip == NULL)
1194                 return 0;
1195
1196         sockaddr_in* sin = (sockaddr_in*)this->ip;
1197         return sin->sin_family;
1198 }
1199
1200 const char* userrec::GetIPString()
1201 {
1202         static char buf[1024];
1203         static char temp[1024];
1204
1205         if (this->ip == NULL)
1206                 return "";
1207
1208         switch (this->GetProtocolFamily())
1209         {
1210 #ifdef SUPPORT_IP6LINKS
1211                 case AF_INET6:
1212                 {
1213                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1214                         inet_ntop(sin->sin6_family, &sin->sin6_addr, buf, sizeof(buf));
1215                         /* IP addresses starting with a : on irc are a Bad Thing (tm) */
1216                         if (*buf == ':')
1217                         {
1218                                 strlcpy(&temp[1], buf, sizeof(temp));
1219                                 *temp = '0';
1220                                 return temp;
1221                         }
1222                         return buf;
1223                 }
1224                 break;
1225 #endif
1226                 case AF_INET:
1227                 {
1228                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1229                         inet_ntop(sin->sin_family, &sin->sin_addr, buf, sizeof(buf));
1230                         return buf;
1231                 }
1232                 break;
1233                 default:
1234                         log(DEBUG,"Ut oh, '%s' has an unknown protocol family!",this->nick);
1235                 break;
1236         }
1237         return "";
1238 }
1239
1240 const char* userrec::GetIPString(char* buf)
1241 {
1242         static char temp[1024];
1243
1244         if (this->ip == NULL)
1245         {
1246                 *buf = 0;
1247                 return buf;
1248         }
1249
1250         switch (this->GetProtocolFamily())
1251         {
1252 #ifdef SUPPORT_IP6LINKS
1253                 case AF_INET6:
1254                 {
1255                         sockaddr_in6* sin = (sockaddr_in6*)this->ip;
1256                         inet_ntop(sin->sin6_family, &sin->sin6_addr, buf, sizeof(buf));
1257                         /* IP addresses starting with a : on irc are a Bad Thing (tm) */
1258                         if (*buf == ':')
1259                         {
1260                                 strlcpy(&temp[1], buf, sizeof(temp));
1261                                 *temp = '0';
1262                                 strlcpy(buf, temp, sizeof(temp));
1263                         }
1264                         return buf;
1265                 }
1266                 break;
1267 #endif
1268                 case AF_INET:
1269                 {
1270                         sockaddr_in* sin = (sockaddr_in*)this->ip;
1271                         inet_ntop(sin->sin_family, &sin->sin_addr, buf, sizeof(buf));
1272                         return buf;
1273                 }
1274                 break;
1275
1276                 default:
1277                         log(DEBUG,"Ut oh, '%s' has an unknown protocol family!",this->nick);
1278                 break;
1279         }
1280         return "";
1281 }
1282