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, irc::sockets::sockaddrs* 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         New->SetFd(socket);
  39         memcpy(&New->ip, ip, sizeof(*ip));
  40         // change the port number of their stored sockaddr to be the server port rather than the client port
  41         if (New->ip.sa.sa_family == AF_INET6)
  42                 New->ip.in6.sin6_port = port;
  43         else
  44                 New->ip.in4.sin_port = port;
  45
  46
  47         /* Give each of the modules an attempt to hook the user for I/O */
  48         FOREACH_MOD_I(Instance, I_OnHookUserIO, OnHookUserIO(New, targetip));
  49
  50         if (New->GetIOHook())
  51         {
  52                 try
  53                 {
  54                         New->GetIOHook()->OnRawSocketAccept(socket, New->GetIPString(), port);
  55                 }
  56                 catch (CoreException& modexcept)
  57                 {
  58                         ServerInstance->Logs->Log("SOCKET", DEBUG,"%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
  59                 }
  60         }
  61
  62         Instance->Logs->Log("USERS", DEBUG,"New user fd: %d", socket);
  63
  64         this->unregistered_count++;
  65
  66         (*(this->clientlist))[New->uuid] = New;
  67
  68         /* The users default nick is their UUID */
  69         New->nick.assign(New->uuid, 0, ServerInstance->Config->Limits.NickMax);
  70
  71         New->server = Instance->FindServerNamePtr(Instance->Config->ServerName);
  72         New->ident.assign("unknown");
  73
  74         New->registered = REG_NONE;
  75         New->signon = Instance->Time() + Instance->Config->dns_timeout;
  76         New->lastping = 1;
  77
  78         /* Smarter than your average bear^H^H^H^Hset of strlcpys. */
  79         New->dhost.assign(New->GetIPString(), 0, 64);
  80         New->host.assign(New->GetIPString(), 0, 64);
  81
  82         Instance->Users->AddLocalClone(New);
  83         Instance->Users->AddGlobalClone(New);
  84
  85         /*
  86          * First class check. We do this again in FullConnect after DNS is done, and NICK/USER is recieved.
  87          * See my note down there for why this is required. DO NOT REMOVE. :) -- w00t
  88          */
  89         ConnectClass* i = New->SetClass();
  90
  91         if (!i)
  92         {
  93                 this->QuitUser(New, "Access denied by configuration");
  94                 return;
  95         }
  96
  97         /*
  98          * Check connect class settings and initialise settings into User.
  99          * This will be done again after DNS resolution. -- w00t
 100          */
 101         New->CheckClass();
 102
 103         this->local_users.push_back(New);
 104
 105         if ((this->local_users.size() > Instance->Config->SoftLimit) || (this->local_users.size() >= (unsigned int)Instance->SE->GetMaxFds()))
 106         {
 107                 Instance->SNO->WriteToSnoMask('a', "Warning: softlimit value has been reached: %d clients", Instance->Config->SoftLimit);
 108                 this->QuitUser(New,"No more connections allowed");
 109                 return;
 110         }
 111
 112         /*
 113          * even with bancache, we still have to keep User::exempt current.
 114          * besides that, if we get a positive bancache hit, we still won't fuck
 115          * them over if they are exempt. -- w00t
 116          */
 117         New->exempt = (Instance->XLines->MatchesLine("E",New) != NULL);
 118
 119         if (BanCacheHit *b = Instance->BanCache->GetHit(New->GetIPString()))
 120         {
 121                 if (!b->Type.empty() && !New->exempt)
 122                 {
 123                         /* user banned */
 124                         Instance->Logs->Log("BANCACHE", DEBUG, std::string("BanCache: Positive hit for ") + New->GetIPString());
 125                         if (*Instance->Config->MoronBanner)
 126                                 New->WriteServ("NOTICE %s :*** %s", New->nick.c_str(), Instance->Config->MoronBanner);
 127                         this->QuitUser(New, b->Reason);
 128                         return;
 129                 }
 130                 else
 131                 {
 132                         Instance->Logs->Log("BANCACHE", DEBUG, std::string("BanCache: Negative hit for ") + New->GetIPString());
 133                 }
 134         }
 135         else
 136         {
 137                 if (!New->exempt)
 138                 {
 139                         XLine* r = Instance->XLines->MatchesLine("Z",New);
 140
 141                         if (r)
 142                         {
 143                                 r->Apply(New);
 144                                 return;
 145                         }
 146                 }
 147         }
 148
 149         if (!Instance->SE->AddFd(New))
 150         {
 151                 Instance->Logs->Log("USERS", DEBUG,"Internal error on new connection");
 152                 this->QuitUser(New, "Internal error handling connection");
 153         }
 154
 155         /* NOTE: even if dns lookups are *off*, we still need to display this.
 156          * BOPM and other stuff requires it.
 157          */
 158         New->WriteServ("NOTICE Auth :*** Looking up your hostname...");
 159
 160         if (Instance->Config->NoUserDns)
 161         {
 162                 New->WriteServ("NOTICE %s :*** Skipping host resolution (disabled by server administrator)", New->nick.c_str());
 163                 New->dns_done = true;
 164         }
 165         else
 166         {
 167                 New->StartDNSLookup();
 168         }
 169 }
 170
 171 void UserManager::QuitUser(User *user, const std::string &quitreason, const char* operreason)
 172 {
 173         if (user->quitting)
 174         {
 175                 ServerInstance->Logs->Log("CULLLIST",DEBUG, "*** Warning *** - You tried to quit a user (%s) twice. Did your module call QuitUser twice?", user->nick.c_str());
 176                 return;
 177         }
 178
 179         user->quitting = true;
 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
 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->ip.sa.sa_family)
 222         {
 223                 case AF_INET6:
 224                         range = ServerInstance->Config->c_ipv6_range;
 225                 break;
 226                 case AF_INET:
 227                         range = ServerInstance->Config->c_ipv4_range;
 228                 break;
 229         }
 230
 231         x = local_clones.find(user->GetCIDRMask(range));
 232         if (x != local_clones.end())
 233                 x->second++;
 234         else
 235                 local_clones[user->GetCIDRMask(range)] = 1;
 236 }
 237
 238 void UserManager::AddGlobalClone(User *user)
 239 {
 240         int range = 32;
 241         clonemap::iterator x;
 242         switch (user->ip.sa.sa_family)
 243         {
 244                 case AF_INET6:
 245                         range = ServerInstance->Config->c_ipv6_range;
 246                 break;
 247                 case AF_INET:
 248                         range = ServerInstance->Config->c_ipv4_range;
 249                 break;
 250         }
 251
 252         x = global_clones.find(user->GetCIDRMask(range));
 253         if (x != global_clones.end())
 254                 x->second++;
 255         else
 256                 global_clones[user->GetCIDRMask(range)] = 1;
 257 }
 258
 259 void UserManager::RemoveCloneCounts(User *user)
 260 {
 261         int range = 32;
 262         switch (user->ip.sa.sa_family)
 263         {
 264                 case AF_INET6:
 265                         range = ServerInstance->Config->c_ipv6_range;
 266                 break;
 267                 case AF_INET:
 268                         range = ServerInstance->Config->c_ipv4_range;
 269                 break;
 270         }
 271
 272         clonemap::iterator x = local_clones.find(user->GetCIDRMask(range));
 273         if (x != local_clones.end())
 274         {
 275                 x->second--;
 276                 if (!x->second)
 277                 {
 278                         local_clones.erase(x);
 279                 }
 280         }
 281
 282         clonemap::iterator y = global_clones.find(user->GetCIDRMask(range));
 283         if (y != global_clones.end())
 284         {
 285                 y->second--;
 286                 if (!y->second)
 287                 {
 288                         global_clones.erase(y);
 289                 }
 290         }
 291 }
 292
 293 unsigned long UserManager::GlobalCloneCount(User *user)
 294 {
 295         int range = 32;
 296         switch (user->ip.sa.sa_family)
 297         {
 298                 case AF_INET6:
 299                         range = ServerInstance->Config->c_ipv6_range;
 300                 break;
 301                 case AF_INET:
 302                         range = ServerInstance->Config->c_ipv4_range;
 303                 break;
 304         }
 305         clonemap::iterator x = global_clones.find(user->GetCIDRMask(range));
 306         if (x != global_clones.end())
 307                 return x->second;
 308         else
 309                 return 0;
 310 }
 311
 312 unsigned long UserManager::LocalCloneCount(User *user)
 313 {
 314         int range = 32;
 315         switch (user->ip.sa.sa_family)
 316         {
 317                 case AF_INET6:
 318                         range = ServerInstance->Config->c_ipv6_range;
 319                 break;
 320                 case AF_INET:
 321                         range = ServerInstance->Config->c_ipv4_range;
 322                 break;
 323         }
 324         clonemap::iterator x = local_clones.find(user->GetCIDRMask(range));
 325         if (x != local_clones.end())
 326                 return x->second;
 327         else
 328                 return 0;
 329 }
 330
 331 /* this function counts all users connected, wether they are registered or NOT. */
 332 unsigned int UserManager::UserCount()
 333 {
 334         /*
 335          * XXX: Todo:
 336          *  As part of this restructuring, move clientlist/etc fields into usermanager.
 337          *      -- w00t
 338          */
 339         return this->clientlist->size();
 340 }
 341
 342 /* this counts only registered users, so that the percentages in /MAP don't mess up */
 343 unsigned int UserManager::RegisteredUserCount()
 344 {
 345         return this->clientlist->size() - this->UnregisteredUserCount();
 346 }
 347
 348 /* return how many users are opered */
 349 unsigned int UserManager::OperCount()
 350 {
 351         return this->all_opers.size();
 352 }
 353
 354 /* return how many users are unregistered */
 355 unsigned int UserManager::UnregisteredUserCount()
 356 {
 357         return this->unregistered_count;
 358 }
 359
 360 /* return how many local registered users there are */
 361 unsigned int UserManager::LocalUserCount()
 362 {
 363         /* Doesnt count unregistered clients */
 364         return (this->local_users.size() - this->UnregisteredUserCount());
 365 }
 366
 367 void UserManager::ServerNoticeAll(const char* text, ...)
 368 {
 369         if (!text)
 370                 return;
 371
 372         char textbuffer[MAXBUF];
 373         char formatbuffer[MAXBUF];
 374         va_list argsPtr;
 375         va_start (argsPtr, text);
 376         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 377         va_end(argsPtr);
 378
 379         snprintf(formatbuffer,MAXBUF,"NOTICE $%s :%s", ServerInstance->Config->ServerName, textbuffer);
 380
 381         for (std::vector<User*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 382         {
 383                 User* t = *i;
 384                 t->WriteServ(std::string(formatbuffer));
 385         }
 386 }
 387
 388 void UserManager::ServerPrivmsgAll(const char* text, ...)
 389 {
 390         if (!text)
 391                 return;
 392
 393         char textbuffer[MAXBUF];
 394         char formatbuffer[MAXBUF];
 395         va_list argsPtr;
 396         va_start (argsPtr, text);
 397         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 398         va_end(argsPtr);
 399
 400         snprintf(formatbuffer,MAXBUF,"PRIVMSG $%s :%s", ServerInstance->Config->ServerName, textbuffer);
 401
 402         for (std::vector<User*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 403         {
 404                 User* t = *i;
 405                 t->WriteServ(std::string(formatbuffer));
 406         }
 407 }
 408
 409 void UserManager::WriteMode(const char* modes, int flags, const char* text, ...)
 410 {
 411         char textbuffer[MAXBUF];
 412         int modelen;
 413         va_list argsPtr;
 414
 415         if (!text || !modes || !flags)
 416         {
 417                 ServerInstance->Logs->Log("USERS", DEFAULT,"*** BUG *** WriteMode was given an invalid parameter");
 418                 return;
 419         }
 420
 421         va_start(argsPtr, text);
 422         vsnprintf(textbuffer, MAXBUF, text, argsPtr);
 423         va_end(argsPtr);
 424         modelen = strlen(modes);
 425
 426         if (flags == WM_AND)
 427         {
 428                 for (std::vector<User*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 429                 {
 430                         User* t = *i;
 431                         bool send_to_user = true;
 432
 433                         for (int n = 0; n < modelen; n++)
 434                         {
 435                                 if (!t->IsModeSet(modes[n]))
 436                                 {
 437                                         send_to_user = false;
 438                                         break;
 439                                 }
 440                         }
 441                         if (send_to_user)
 442                         {
 443                                 t->WriteServ("NOTICE %s :%s", t->nick.c_str(), textbuffer);
 444                         }
 445                 }
 446         }
 447         else if (flags == WM_OR)
 448         {
 449                 for (std::vector<User*>::const_iterator i = local_users.begin(); i != local_users.end(); i++)
 450                 {
 451                         User* t = *i;
 452                         bool send_to_user = false;
 453
 454                         for (int n = 0; n < modelen; n++)
 455                         {
 456                                 if (t->IsModeSet(modes[n]))
 457                                 {
 458                                         send_to_user = true;
 459                                         break;
 460                                 }
 461                         }
 462
 463                         if (send_to_user)
 464                         {
 465                                 t->WriteServ("NOTICE %s :%s", t->nick.c_str(), textbuffer);
 466                         }
 467                 }
 468         }
 469 }
 470
 471 /* return how many users have a given mode e.g. 'a' */
 472 int UserManager::ModeCount(const char mode)
 473 {
 474         ModeHandler* mh = this->ServerInstance->Modes->FindMode(mode, MODETYPE_USER);
 475
 476         if (mh)
 477                 return mh->GetCount();
 478         else
 479                 return 0;
 480 }