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(InspIRCd* Instance, int socket, int port, bool iscached, sockaddr* ip, const std::string &targetip)
  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         User* New = NULL;
  27         try
  28         {
  29                 New = new User(Instance);
  30         }
  31         catch (...)
  32         {
  33                 Instance->Logs->Log("USERS", DEFAULT,"*** WTF *** Duplicated UUID! -- Crack smoking monkies have been unleashed.");
  34                 Instance->SNO->WriteToSnoMask('A', "WARNING *** Duplicate UUID allocated!");
  35                 return;
  36         }
  37
  38         char ipaddr[MAXBUF];
  39 #ifdef IPV6
  40         if (ip->sa_family == AF_INET6)
  41                 inet_ntop(AF_INET6, &((const sockaddr_in6*)ip)->sin6_addr, ipaddr, sizeof(ipaddr));
  42         else
  43 #endif
  44                 inet_ntop(AF_INET, &((const sockaddr_in*)ip)->sin_addr, ipaddr, sizeof(ipaddr));
  45
  46         New->SetFd(socket);
  47         New->SetSockAddr(ip->sa_family, ipaddr, port);
  48
  49         /* Give each of the modules an attempt to hook the user for I/O */
  50         FOREACH_MOD_I(Instance, I_OnHookUserIO, OnHookUserIO(New, targetip));
  51
  52         if (New->GetIOHook())
  53         {
  54                 try
  55                 {
  56                         New->GetIOHook()->OnRawSocketAccept(socket, ipaddr, port);
  57                 }
  58                 catch (CoreException& modexcept)
  59                 {
  60                         ServerInstance->Logs->Log("SOCKET", DEBUG,"%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
  61                 }
  62         }
  63
  64         Instance->Logs->Log("USERS", DEBUG,"New user fd: %d", socket);
  65
  66         this->unregistered_count++;
  67
  68         (*(this->clientlist))[New->uuid] = New;
  69
  70         /* The users default nick is their UUID */
  71         New->nick.assign(New->uuid, 0, ServerInstance->Config->Limits.NickMax);
  72
  73         New->server = Instance->FindServerNamePtr(Instance->Config->ServerName);
  74         New->ident.assign("unknown");
  75
  76         New->registered = REG_NONE;
  77         New->signon = Instance->Time() + Instance->Config->dns_timeout;
  78         New->lastping = 1;
  79
  80         /* Smarter than your average bear^H^H^H^Hset of strlcpys. */
  81         New->dhost.assign(New->GetIPString(), 0, 64);
  82         New->host.assign(New->GetIPString(), 0, 64);
  83
  84         Instance->Users->AddLocalClone(New);
  85         Instance->Users->AddGlobalClone(New);
  86
  87         /*
  88          * First class check. We do this again in FullConnect after DNS is done, and NICK/USER is recieved.
  89          * See my note down there for why this is required. DO NOT REMOVE. :) -- w00t
  90          */
  91         ConnectClass* i = New->SetClass();
  92
  93         if (!i)
  94         {
  95                 this->QuitUser(New, "Access denied by configuration");
  96                 return;
  97         }
  98
  99         /*
 100          * Check connect class settings and initialise settings into User.
 101          * This will be done again after DNS resolution. -- w00t
 102          */
 103         New->CheckClass();
 104
 105         this->local_users.push_back(New);
 106
 107         if ((this->local_users.size() > Instance->Config->SoftLimit) || (this->local_users.size() >= (unsigned int)Instance->SE->GetMaxFds()))
 108         {
 109                 Instance->SNO->WriteToSnoMask('A', "Warning: softlimit value has been reached: %d clients", Instance->Config->SoftLimit);
 110                 this->QuitUser(New,"No more connections allowed");
 111                 return;
 112         }
 113
 114         /*
 115          * even with bancache, we still have to keep User::exempt current.
 116          * besides that, if we get a positive bancache hit, we still won't fuck
 117          * them over if they are exempt. -- w00t
 118          */
 119         New->exempt = (Instance->XLines->MatchesLine("E",New) != NULL);
 120
 121         if (BanCacheHit *b = Instance->BanCache->GetHit(New->GetIPString()))
 122         {
 123                 if (!b->Type.empty() && !New->exempt)
 124                 {
 125                         /* user banned */
 126                         Instance->Logs->Log("BANCACHE", DEBUG, std::string("BanCache: Positive hit for ") + New->GetIPString());
 127                         if (*Instance->Config->MoronBanner)
 128                                 New->WriteServ("NOTICE %s :*** %s", New->nick.c_str(), Instance->Config->MoronBanner);
 129                         this->QuitUser(New, b->Reason);
 130                         return;
 131                 }
 132                 else
 133                 {
 134                         Instance->Logs->Log("BANCACHE", DEBUG, std::string("BanCache: Negative hit for ") + New->GetIPString());
 135                 }
 136         }
 137         else
 138         {
 139                 if (!New->exempt)
 140                 {
 141                         XLine* r = Instance->XLines->MatchesLine("Z",New);
 142
 143                         if (r)
 144                         {
 145                                 r->Apply(New);
 146                                 return;
 147                         }
 148                 }
 149         }
 150
 151         if (!Instance->SE->AddFd(New))
 152         {
 153                 Instance->Logs->Log("USERS", DEBUG,"Internal error on new connection");
 154                 this->QuitUser(New, "Internal error handling connection");
 155         }
 156
 157         /* NOTE: even if dns lookups are *off*, we still need to display this.
 158          * BOPM and other stuff requires it.
 159          */
 160         New->WriteServ("NOTICE Auth :*** Looking up your hostname...");
 161
 162         if (Instance->Config->NoUserDns)
 163         {
 164                 New->WriteServ("NOTICE %s :*** Skipping host resolution (disabled by server administrator)", New->nick.c_str());
 165                 New->dns_done = true;
 166         }
 167         else
 168         {
 169                 New->StartDNSLookup();
 170         }
 171 }
 172
 173 void UserManager::QuitUser(User *user, const std::string &quitreason, const char* operreason)
 174 {
 175         if (user->quitting)
 176         {
 177                 ServerInstance->Logs->Log("CULLLIST",DEBUG, "*** Warning *** - You tried to quit a user (%s) twice. Did your module call QuitUser twice?", user->nick.c_str());
 178                 return;
 179         }
 180
 181         ServerInstance->Logs->Log("USERS", DEBUG,"QuitUser: %s '%s'", user->nick.c_str(), quitreason.c_str());
 182         user->Write("ERROR :Closing link: (%s@%s) [%s]", user->ident.c_str(), user->host.c_str(), *operreason ? operreason : quitreason.c_str());
 183         user->quitting = true;
 184         user->quietquit = false;
 185         user->quitmsg = quitreason;
 186
 187         std::string reason;
 188         std::string oper_reason;
 189         reason.assign(quitreason, 0, ServerInstance->Config->Limits.MaxQuit);
 190         if (!*operreason)
 191         {
 192                 user->operquitmsg = quitreason;
 193                 oper_reason.assign(quitreason, 0, ServerInstance->Config->Limits.MaxQuit);
 194         }
 195         else
 196         {
 197                 user->operquitmsg = operreason;
 198                 oper_reason.assign(operreason, 0, ServerInstance->Config->Limits.MaxQuit);
 199         }
 200
 201         ServerInstance->GlobalCulls.AddItem(user);
 202
 203         if (user->registered == REG_ALL)
 204         {
 205                 FOREACH_MOD_I(ServerInstance,I_OnUserQuit,OnUserQuit(user, reason, oper_reason));
 206                 user->PurgeEmptyChannels();
 207                 user->WriteCommonQuit(reason, oper_reason);
 208         }
 209
 210         FOREACH_MOD_I(ServerInstance,I_OnUserDisconnect,OnUserDisconnect(user));
 211
 212         // Move the user onto their UID, to allow nick to be reused immediately
 213         user->UpdateNickHash(user->uuid.c_str());
 214 }
 215
 216
 217 void UserManager::AddLocalClone(User *user)
 218 {
 219         int range = 32;
 220         clonemap::iterator x;
 221         switch (user->GetProtocolFamily())
 222         {
 223 #ifdef SUPPORT_IP6LINKS
 224                 case AF_INET6:
 225                 {
 226                         range = ServerInstance->Config->c_ipv6_range;
 227                 }
 228                 break;
 229 #endif
 230                 case AF_INET:
 231                 {
 232                         range = ServerInstance->Config->c_ipv4_range;
 233                 }
 234                 break;
 235         }
 236
 237         x = local_clones.find(user->GetCIDRMask(range));
 238         if (x != local_clones.end())
 239                 x->second++;
 240         else
 241                 local_clones[user->GetCIDRMask(range)] = 1;
 242 }
 243
 244 void UserManager::AddGlobalClone(User *user)
 245 {
 246         int range = 32;
 247         clonemap::iterator x;
 248         switch (user->GetProtocolFamily())
 249         {
 250 #ifdef SUPPORT_IP6LINKS
 251                 case AF_INET6:
 252                 {
 253                         range = ServerInstance->Config->c_ipv6_range;
 254                 }
 255                 break;
 256 #endif
 257                 case AF_INET:
 258                 {
 259                         range = ServerInstance->Config->c_ipv4_range;
 260                 }
 261                 break;
 262         }
 263
 264         x = global_clones.find(user->GetCIDRMask(range));
 265         if (x != global_clones.end())
 266                 x->second++;
 267         else
 268                 global_clones[user->GetCIDRMask(range)] = 1;
 269 }
 270
 271 void UserManager::RemoveCloneCounts(User *user)
 272 {
 273         int range = 32;
 274         switch (user->GetProtocolFamily())
 275         {
 276 #ifdef SUPPORT_IP6LINKS
 277                 case AF_INET6:
 278                 {
 279                         range = ServerInstance->Config->c_ipv6_range;
 280                 }
 281                 break;
 282 #endif
 283                 case AF_INET:
 284                 {
 285                         range = ServerInstance->Config->c_ipv4_range;
 286                 }
 287                 break;
 288         }
 289
 290         clonemap::iterator x = local_clones.find(user->GetCIDRMask(range));
 291         if (x != local_clones.end())
 292         {
 293                 x->second--;
 294                 if (!x->second)
 295                 {
 296                         local_clones.erase(x);
 297                 }
 298         }
 299
 300         clonemap::iterator y = global_clones.find(user->GetCIDRMask(range));
 301         if (y != global_clones.end())
 302         {
 303                 y->second--;
 304                 if (!y->second)
 305                 {
 306                         global_clones.erase(y);
 307                 }
 308         }
 309 }
 310
 311 unsigned long UserManager::GlobalCloneCount(User *user)
 312 {
 313         int range = 32;
 314         switch (user->GetProtocolFamily())
 315         {
 316 #ifdef SUPPORT_IP6LINKS
 317                 case AF_INET6:
 318                 {
 319                         range = ServerInstance->Config->c_ipv6_range;
 320                 }
 321                 break;
 322 #endif
 323                 case AF_INET:
 324                 {
 325                         range = ServerInstance->Config->c_ipv4_range;
 326                 }
 327                 break;
 328         }
 329         clonemap::iterator x = global_clones.find(user->GetCIDRMask(range));
 330         if (x != global_clones.end())
 331                 return x->second;
 332         else
 333                 return 0;
 334 }
 335
 336 unsigned long UserManager::LocalCloneCount(User *user)
 337 {
 338         int range = 32;
 339         switch (user->GetProtocolFamily())
 340         {
 341 #ifdef SUPPORT_IP6LINKS
 342                 case AF_INET6:
 343                 {
 344                         range = ServerInstance->Config->c_ipv6_range;
 345                 }
 346                 break;
 347 #endif
 348                 case AF_INET:
 349                 {
 350                         range = ServerInstance->Config->c_ipv4_range;
 351                 }
 352                 break;
 353         }
 354         clonemap::iterator x = local_clones.find(user->GetCIDRMask(range));
 355         if (x != local_clones.end())
 356                 return x->second;
 357         else
 358                 return 0;
 359 }
 360
 361 /* this function counts all users connected, wether they are registered or NOT. */
 362 unsigned int UserManager::UserCount()
 363 {
 364         /*
 365          * XXX: Todo:
 366          *  As part of this restructuring, move clientlist/etc fields into usermanager.
 367          *      -- w00t
 368          */
 369         return this->clientlist->size();
 370 }
 371
 372 /* this counts only registered users, so that the percentages in /MAP don't mess up */
 373 unsigned int UserManager::RegisteredUserCount()
 374 {
 375         return this->clientlist->size() - this->UnregisteredUserCount();
 376 }
 377
 378 /* return how many users are opered */
 379 unsigned int UserManager::OperCount()
 380 {
 381         return this->all_opers.size();
 382 }
 383
 384 /* return how many users are unregistered */
 385 unsigned int UserManager::UnregisteredUserCount()
 386 {
 387         return this->unregistered_count;
 388 }
 389
 390 /* return how many local registered users there are */
 391 unsigned int UserManager::LocalUserCount()
 392 {
 393         /* Doesnt count unregistered clients */
 394         return (this->local_users.size() - this->UnregisteredUserCount());
 395 }
 396
 397 void UserManager::ServerNoticeAll(const char* text, ...)
 398 {
 399         if (!text)
 400                 return;
 401
 402         char textbuffer[MAXBUF];
 403         char formatbuffer[MAXBUF];
 404         va_list argsPtr;
 405         va_start (argsPtr, text);
 406         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 407         va_end(argsPtr);
 408
 409         snprintf(formatbuffer,MAXBUF,"NOTICE $%s :%s", ServerInstance->Config->ServerName, textbuffer);
 410
 411         for (std::vector<User*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 412         {
 413                 User* t = *i;
 414                 t->WriteServ(std::string(formatbuffer));
 415         }
 416 }
 417
 418 void UserManager::ServerPrivmsgAll(const char* text, ...)
 419 {
 420         if (!text)
 421                 return;
 422
 423         char textbuffer[MAXBUF];
 424         char formatbuffer[MAXBUF];
 425         va_list argsPtr;
 426         va_start (argsPtr, text);
 427         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 428         va_end(argsPtr);
 429
 430         snprintf(formatbuffer,MAXBUF,"PRIVMSG $%s :%s", ServerInstance->Config->ServerName, textbuffer);
 431
 432         for (std::vector<User*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 433         {
 434                 User* t = *i;
 435                 t->WriteServ(std::string(formatbuffer));
 436         }
 437 }
 438
 439 void UserManager::WriteMode(const char* modes, int flags, const char* text, ...)
 440 {
 441         char textbuffer[MAXBUF];
 442         int modelen;
 443         va_list argsPtr;
 444
 445         if (!text || !modes || !flags)
 446         {
 447                 ServerInstance->Logs->Log("USERS", DEFAULT,"*** BUG *** WriteMode was given an invalid parameter");
 448                 return;
 449         }
 450
 451         va_start(argsPtr, text);
 452         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 453         va_end(argsPtr);
 454         modelen = strlen(modes);
 455
 456         if (flags == WM_AND)
 457         {
 458                 for (std::vector<User*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 459                 {
 460                         User* t = *i;
 461                         bool send_to_user = true;
 462
 463                         for (int n = 0; n < modelen; n++)
 464                         {
 465                                 if (!t->IsModeSet(modes[n]))
 466                                 {
 467                                         send_to_user = false;
 468                                         break;
 469                                 }
 470                         }
 471                         if (send_to_user)
 472                         {
 473                                 t->WriteServ("NOTICE %s :%s", t->nick.c_str(), textbuffer);
 474                         }
 475                 }
 476         }
 477         else if (flags == WM_OR)
 478         {
 479                 for (std::vector<User*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 480                 {
 481                         User* t = *i;
 482                         bool send_to_user = false;
 483
 484                         for (int n = 0; n < modelen; n++)
 485                         {
 486                                 if (t->IsModeSet(modes[n]))
 487                                 {
 488                                         send_to_user = true;
 489                                         break;
 490                                 }
 491                         }
 492
 493                         if (send_to_user)
 494                         {
 495                                 t->WriteServ("NOTICE %s :%s", t->nick.c_str(), textbuffer);
 496                         }
 497                 }
 498         }
 499 }
 500
 501 /* return how many users have a given mode e.g. 'a' */
 502 int UserManager::ModeCount(const char mode)
 503 {
 504         ModeHandler* mh = this->ServerInstance->Modes->FindMode(mode, MODETYPE_USER);
 505
 506         if (mh)
 507                 return mh->GetCount();
 508         else
 509                 return 0;
 510 }