src/usermanager.cpp

   1 /*       +------------------------------------+
   2  *       | Inspire Internet Relay Chat Daemon |
   3  *       +------------------------------------+
   4  *
   5  *  InspIRCd: (C) 2002-2009 InspIRCd Development Team
   6  * See: http://wiki.inspircd.org/Credits
   7  *
   8  * This program is free but copyrighted software; see
   9  *          the file COPYING for details.
  10  *
  11  * ---------------------------------------------------
  12  */
  13
  14 /* $Core */
  15
  16 #include "inspircd.h"
  17 #include "xline.h"
  18 #include "bancache.h"
  19
  20 /* add a client connection to the sockets list */
  21 void UserManager::AddUser(int socket, ListenSocket* via, irc::sockets::sockaddrs* client, irc::sockets::sockaddrs* server)
  22 {
  23         /* NOTE: Calling this one parameter constructor for User automatically
  24          * allocates a new UUID and places it in the hash_map.
  25          */
  26         LocalUser* New = NULL;
  27         try
  28         {
  29                 New = new LocalUser();
  30         }
  31         catch (...)
  32         {
  33                 ServerInstance->Logs->Log("USERS", DEFAULT,"*** WTF *** Duplicated UUID! -- Crack smoking monkies have been unleashed.");
  34                 ServerInstance->SNO->WriteToSnoMask('a', "WARNING *** Duplicate UUID allocated!");
  35                 return;
  36         }
  37
  38         New->SetFd(socket);
  39         memcpy(&New->client_sa, client, sizeof(irc::sockets::sockaddrs));
  40         memcpy(&New->server_sa, server, sizeof(irc::sockets::sockaddrs));
  41
  42         /* Give each of the modules an attempt to hook the user for I/O */
  43         FOREACH_MOD(I_OnHookIO, OnHookIO(New, via));
  44
  45         if (New->GetIOHook())
  46         {
  47                 try
  48                 {
  49                         New->GetIOHook()->OnStreamSocketAccept(New, client, server);
  50                 }
  51                 catch (CoreException& modexcept)
  52                 {
  53                         ServerInstance->Logs->Log("SOCKET", DEBUG,"%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
  54                 }
  55         }
  56
  57         ServerInstance->Logs->Log("USERS", DEBUG,"New user fd: %d", socket);
  58
  59         this->unregistered_count++;
  60
  61         (*(this->clientlist))[New->uuid] = New;
  62
  63         /* The users default nick is their UUID */
  64         New->nick.assign(New->uuid, 0, ServerInstance->Config->Limits.NickMax);
  65
  66         New->server = ServerInstance->Config->ServerName;
  67         New->ident.assign("unknown");
  68
  69         New->registered = REG_NONE;
  70         New->signon = ServerInstance->Time() + ServerInstance->Config->dns_timeout;
  71         New->lastping = 1;
  72
  73         /* Smarter than your average bear^H^H^H^Hset of strlcpys. */
  74         New->dhost.assign(New->GetIPString(), 0, 64);
  75         New->host.assign(New->GetIPString(), 0, 64);
  76
  77         ServerInstance->Users->AddLocalClone(New);
  78         ServerInstance->Users->AddGlobalClone(New);
  79
  80         /*
  81          * First class check. We do this again in FullConnect after DNS is done, and NICK/USER is recieved.
  82          * See my note down there for why this is required. DO NOT REMOVE. :) -- w00t
  83          */
  84         New->SetClass();
  85
  86         /*
  87          * Check connect class settings and initialise settings into User.
  88          * This will be done again after DNS resolution. -- w00t
  89          */
  90         New->CheckClass();
  91
  92         this->local_users.push_back(New);
  93
  94         if ((this->local_users.size() > ServerInstance->Config->SoftLimit) || (this->local_users.size() >= (unsigned int)ServerInstance->SE->GetMaxFds()))
  95         {
  96                 ServerInstance->SNO->WriteToSnoMask('a', "Warning: softlimit value has been reached: %d clients", ServerInstance->Config->SoftLimit);
  97                 this->QuitUser(New,"No more connections allowed");
  98                 return;
  99         }
 100
 101         /*
 102          * even with bancache, we still have to keep User::exempt current.
 103          * besides that, if we get a positive bancache hit, we still won't fuck
 104          * them over if they are exempt. -- w00t
 105          */
 106         New->exempt = (ServerInstance->XLines->MatchesLine("E",New) != NULL);
 107
 108         if (BanCacheHit *b = ServerInstance->BanCache->GetHit(New->GetIPString()))
 109         {
 110                 if (!b->Type.empty() && !New->exempt)
 111                 {
 112                         /* user banned */
 113                         ServerInstance->Logs->Log("BANCACHE", DEBUG, std::string("BanCache: Positive hit for ") + New->GetIPString());
 114                         if (!ServerInstance->Config->MoronBanner.empty())
 115                                 New->WriteServ("NOTICE %s :*** %s", New->nick.c_str(), ServerInstance->Config->MoronBanner.c_str());
 116                         this->QuitUser(New, b->Reason);
 117                         return;
 118                 }
 119                 else
 120                 {
 121                         ServerInstance->Logs->Log("BANCACHE", DEBUG, std::string("BanCache: Negative hit for ") + New->GetIPString());
 122                 }
 123         }
 124         else
 125         {
 126                 if (!New->exempt)
 127                 {
 128                         XLine* r = ServerInstance->XLines->MatchesLine("Z",New);
 129
 130                         if (r)
 131                         {
 132                                 r->Apply(New);
 133                                 return;
 134                         }
 135                 }
 136         }
 137
 138         if (!ServerInstance->SE->AddFd(New, FD_WANT_FAST_READ | FD_WANT_EDGE_WRITE))
 139         {
 140                 ServerInstance->Logs->Log("USERS", DEBUG,"Internal error on new connection");
 141                 this->QuitUser(New, "Internal error handling connection");
 142         }
 143
 144         /* NOTE: even if dns lookups are *off*, we still need to display this.
 145          * BOPM and other stuff requires it.
 146          */
 147         New->WriteServ("NOTICE Auth :*** Looking up your hostname...");
 148
 149         if (ServerInstance->Config->NoUserDns)
 150         {
 151                 New->WriteServ("NOTICE %s :*** Skipping host resolution (disabled by server administrator)", New->nick.c_str());
 152                 New->dns_done = true;
 153         }
 154         else
 155         {
 156                 New->StartDNSLookup();
 157         }
 158 }
 159
 160 void UserManager::QuitUser(User *user, const std::string &quitreason, const char* operreason)
 161 {
 162         if (user->quitting)
 163         {
 164                 ServerInstance->Logs->Log("CULLLIST",DEBUG, "*** Warning *** - You tried to quit a user (%s) twice. Did your module call QuitUser twice?", user->nick.c_str());
 165                 return;
 166         }
 167
 168         if (IS_SERVER(user))
 169         {
 170                 ServerInstance->Logs->Log("CULLLIST",DEBUG, "*** Warning *** - You tried to quit a fake user (%s)", user->nick.c_str());
 171                 return;
 172         }
 173
 174         user->quitting = true;
 175
 176         ServerInstance->Logs->Log("USERS", DEBUG, "QuitUser: %s=%s '%s'", user->uuid.c_str(), user->nick.c_str(), quitreason.c_str());
 177         user->Write("ERROR :Closing link: (%s@%s) [%s]", user->ident.c_str(), user->host.c_str(), *operreason ? operreason : quitreason.c_str());
 178
 179         std::string reason;
 180         std::string oper_reason;
 181         reason.assign(quitreason, 0, ServerInstance->Config->Limits.MaxQuit);
 182         if (operreason && *operreason)
 183                 oper_reason.assign(operreason, 0, ServerInstance->Config->Limits.MaxQuit);
 184         else
 185                 oper_reason = quitreason;
 186
 187         ServerInstance->GlobalCulls.AddItem(user);
 188
 189         if (user->registered == REG_ALL)
 190         {
 191                 FOREACH_MOD(I_OnUserQuit,OnUserQuit(user, reason, oper_reason));
 192                 user->WriteCommonQuit(reason, oper_reason);
 193         }
 194
 195         if (user->registered != REG_ALL)
 196                 if (ServerInstance->Users->unregistered_count)
 197                         ServerInstance->Users->unregistered_count--;
 198
 199         if (IS_LOCAL(user))
 200         {
 201                 FOREACH_MOD(I_OnUserDisconnect,OnUserDisconnect(IS_LOCAL(user)));
 202                 user->DoWrite();
 203                 if (user->GetIOHook())
 204                 {
 205                         try
 206                         {
 207                                 user->GetIOHook()->OnStreamSocketClose(user);
 208                         }
 209                         catch (CoreException& modexcept)
 210                         {
 211                                 ServerInstance->Logs->Log("USERS",DEBUG, "%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
 212                         }
 213                 }
 214
 215                 ServerInstance->SE->DelFd(user);
 216                 user->Close();
 217                 // user->Close() will set fd to -1; this breaks IS_LOCAL. Fix
 218                 user->SetFd(INT_MAX);
 219         }
 220
 221         /*
 222          * this must come before the ServerInstance->SNO->WriteToSnoMaskso that it doesnt try to fill their buffer with anything
 223          * if they were an oper with +sn +qQ.
 224          */
 225         if (user->registered == REG_ALL)
 226         {
 227                 if (IS_LOCAL(user))
 228                 {
 229                         if (!user->quietquit)
 230                         {
 231                                 ServerInstance->SNO->WriteToSnoMask('q',"Client exiting: %s!%s@%s [%s]",
 232                                         user->nick.c_str(), user->ident.c_str(), user->host.c_str(), oper_reason.c_str());
 233                         }
 234                 }
 235                 else
 236                 {
 237                         if ((!ServerInstance->SilentULine(user->server)) && (!user->quietquit))
 238                         {
 239                                 ServerInstance->SNO->WriteToSnoMask('Q',"Client exiting on server %s: %s!%s@%s [%s]",
 240                                         user->server.c_str(), user->nick.c_str(), user->ident.c_str(), user->host.c_str(), oper_reason.c_str());
 241                         }
 242                 }
 243                 user->AddToWhoWas();
 244         }
 245
 246         user_hash::iterator iter = this->clientlist->find(user->nick);
 247
 248         if (iter != this->clientlist->end())
 249                 this->clientlist->erase(iter);
 250         else
 251                 ServerInstance->Logs->Log("USERS", DEBUG, "iter == clientlist->end, can't remove them from hash... problematic..");
 252 }
 253
 254
 255 void UserManager::AddLocalClone(User *user)
 256 {
 257         int range = 32;
 258         clonemap::iterator x;
 259         switch (user->client_sa.sa.sa_family)
 260         {
 261                 case AF_INET6:
 262                         range = ServerInstance->Config->c_ipv6_range;
 263                 break;
 264                 case AF_INET:
 265                         range = ServerInstance->Config->c_ipv4_range;
 266                 break;
 267         }
 268
 269         x = local_clones.find(user->GetCIDRMask(range));
 270         if (x != local_clones.end())
 271                 x->second++;
 272         else
 273                 local_clones[user->GetCIDRMask(range)] = 1;
 274 }
 275
 276 void UserManager::AddGlobalClone(User *user)
 277 {
 278         int range = 32;
 279         clonemap::iterator x;
 280         switch (user->client_sa.sa.sa_family)
 281         {
 282                 case AF_INET6:
 283                         range = ServerInstance->Config->c_ipv6_range;
 284                 break;
 285                 case AF_INET:
 286                         range = ServerInstance->Config->c_ipv4_range;
 287                 break;
 288         }
 289
 290         x = global_clones.find(user->GetCIDRMask(range));
 291         if (x != global_clones.end())
 292                 x->second++;
 293         else
 294                 global_clones[user->GetCIDRMask(range)] = 1;
 295 }
 296
 297 void UserManager::RemoveCloneCounts(User *user)
 298 {
 299         int range = 32;
 300         switch (user->client_sa.sa.sa_family)
 301         {
 302                 case AF_INET6:
 303                         range = ServerInstance->Config->c_ipv6_range;
 304                 break;
 305                 case AF_INET:
 306                         range = ServerInstance->Config->c_ipv4_range;
 307                 break;
 308         }
 309
 310         clonemap::iterator x = local_clones.find(user->GetCIDRMask(range));
 311         if (x != local_clones.end())
 312         {
 313                 x->second--;
 314                 if (!x->second)
 315                 {
 316                         local_clones.erase(x);
 317                 }
 318         }
 319
 320         clonemap::iterator y = global_clones.find(user->GetCIDRMask(range));
 321         if (y != global_clones.end())
 322         {
 323                 y->second--;
 324                 if (!y->second)
 325                 {
 326                         global_clones.erase(y);
 327                 }
 328         }
 329 }
 330
 331 unsigned long UserManager::GlobalCloneCount(User *user)
 332 {
 333         int range = 32;
 334         switch (user->client_sa.sa.sa_family)
 335         {
 336                 case AF_INET6:
 337                         range = ServerInstance->Config->c_ipv6_range;
 338                 break;
 339                 case AF_INET:
 340                         range = ServerInstance->Config->c_ipv4_range;
 341                 break;
 342         }
 343         clonemap::iterator x = global_clones.find(user->GetCIDRMask(range));
 344         if (x != global_clones.end())
 345                 return x->second;
 346         else
 347                 return 0;
 348 }
 349
 350 unsigned long UserManager::LocalCloneCount(User *user)
 351 {
 352         int range = 32;
 353         switch (user->client_sa.sa.sa_family)
 354         {
 355                 case AF_INET6:
 356                         range = ServerInstance->Config->c_ipv6_range;
 357                 break;
 358                 case AF_INET:
 359                         range = ServerInstance->Config->c_ipv4_range;
 360                 break;
 361         }
 362         clonemap::iterator x = local_clones.find(user->GetCIDRMask(range));
 363         if (x != local_clones.end())
 364                 return x->second;
 365         else
 366                 return 0;
 367 }
 368
 369 /* this function counts all users connected, wether they are registered or NOT. */
 370 unsigned int UserManager::UserCount()
 371 {
 372         /*
 373          * XXX: Todo:
 374          *  As part of this restructuring, move clientlist/etc fields into usermanager.
 375          *      -- w00t
 376          */
 377         return this->clientlist->size();
 378 }
 379
 380 /* this counts only registered users, so that the percentages in /MAP don't mess up */
 381 unsigned int UserManager::RegisteredUserCount()
 382 {
 383         return this->clientlist->size() - this->UnregisteredUserCount();
 384 }
 385
 386 /* return how many users are opered */
 387 unsigned int UserManager::OperCount()
 388 {
 389         return this->all_opers.size();
 390 }
 391
 392 /* return how many users are unregistered */
 393 unsigned int UserManager::UnregisteredUserCount()
 394 {
 395         return this->unregistered_count;
 396 }
 397
 398 /* return how many local registered users there are */
 399 unsigned int UserManager::LocalUserCount()
 400 {
 401         /* Doesnt count unregistered clients */
 402         return (this->local_users.size() - this->UnregisteredUserCount());
 403 }
 404
 405 void UserManager::ServerNoticeAll(const char* text, ...)
 406 {
 407         if (!text)
 408                 return;
 409
 410         char textbuffer[MAXBUF];
 411         char formatbuffer[MAXBUF];
 412         va_list argsPtr;
 413         va_start (argsPtr, text);
 414         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 415         va_end(argsPtr);
 416
 417         snprintf(formatbuffer,MAXBUF,"NOTICE $%s :%s", ServerInstance->Config->ServerName.c_str(), textbuffer);
 418
 419         for (std::vector<LocalUser*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 420         {
 421                 User* t = *i;
 422                 t->WriteServ(std::string(formatbuffer));
 423         }
 424 }
 425
 426 void UserManager::ServerPrivmsgAll(const char* text, ...)
 427 {
 428         if (!text)
 429                 return;
 430
 431         char textbuffer[MAXBUF];
 432         char formatbuffer[MAXBUF];
 433         va_list argsPtr;
 434         va_start (argsPtr, text);
 435         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 436         va_end(argsPtr);
 437
 438         snprintf(formatbuffer,MAXBUF,"PRIVMSG $%s :%s", ServerInstance->Config->ServerName.c_str(), textbuffer);
 439
 440         for (std::vector<LocalUser*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 441         {
 442                 User* t = *i;
 443                 t->WriteServ(std::string(formatbuffer));
 444         }
 445 }
 446
 447 void UserManager::WriteMode(const char* modes, int flags, const char* text, ...)
 448 {
 449         char textbuffer[MAXBUF];
 450         int modelen;
 451         va_list argsPtr;
 452
 453         if (!text || !modes || !flags)
 454         {
 455                 ServerInstance->Logs->Log("USERS", DEFAULT,"*** BUG *** WriteMode was given an invalid parameter");
 456                 return;
 457         }
 458
 459         va_start(argsPtr, text);
 460         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 461         va_end(argsPtr);
 462         modelen = strlen(modes);
 463
 464         if (flags == WM_AND)
 465         {
 466                 for (std::vector<LocalUser*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 467                 {
 468                         User* t = *i;
 469                         bool send_to_user = true;
 470
 471                         for (int n = 0; n < modelen; n++)
 472                         {
 473                                 if (!t->IsModeSet(modes[n]))
 474                                 {
 475                                         send_to_user = false;
 476                                         break;
 477                                 }
 478                         }
 479                         if (send_to_user)
 480                         {
 481                                 t->WriteServ("NOTICE %s :%s", t->nick.c_str(), textbuffer);
 482                         }
 483                 }
 484         }
 485         else if (flags == WM_OR)
 486         {
 487                 for (std::vector<LocalUser*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 488                 {
 489                         User* t = *i;
 490                         bool send_to_user = false;
 491
 492                         for (int n = 0; n < modelen; n++)
 493                         {
 494                                 if (t->IsModeSet(modes[n]))
 495                                 {
 496                                         send_to_user = true;
 497                                         break;
 498                                 }
 499                         }
 500
 501                         if (send_to_user)
 502                         {
 503                                 t->WriteServ("NOTICE %s :%s", t->nick.c_str(), textbuffer);
 504                         }
 505                 }
 506         }
 507 }
 508
 509 /* return how many users have a given mode e.g. 'a' */
 510 int UserManager::ModeCount(const char mode)
 511 {
 512         ModeHandler* mh = ServerInstance->Modes->FindMode(mode, MODETYPE_USER);
 513
 514         if (mh)
 515                 return mh->GetCount();
 516         else
 517                 return 0;
 518 }